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PS2 KEYBOARD CONTROLLER
EC3648
Preliminary
FEATURE
Low cost - eliminate need external components. Phantom key detects. Support scan code set 1 ,2 and 3. Support PC AT and PS/2 keyboard . Low power CMOS device technology. Internal pull-up resistor. Tri-state outputs for easy board application. Built-in 8-bit's CPU. 5K bytes of ROM. 128 bytes of RAM. Support WINDOWS TM 95, 98, 2000, ME, XP keys. Normal operation frequency is 4 MHz. Built-in RC type oscillator with external resister On chip general 8 bit preload timer
DESCRIPTION
The EC3648 is a single chip CMOS micro-controller for keyboard application, specially for IBM PC AT and all compatible machines. It incorporate a 8-bit's CPU core, 5K bytes of ROM, and 128 bytes of RAM used as working RAM and stack area. The EC3648 control all scan codes, scan timing and communications between the keyboard and PC. It is easy to implement a high performance, low cost keyboard with the minimal external components.
APPLICATION
* IBM PC AT or compatible machine keyboard. * IBM PS/2 model 30,50,60,80 or compatible machine keyboard. * Japanese keyboard. * Korean keyboard. * Brazilian keyboard. * European keyboard.
Rev 01 Page 1 of 21
PS2 KEYBOARD CONTROLLER
EC3648
Preliminary
PIN ASSIGNMENT
TMODE DATA ROUT Scroll
37
GND
5
4
3
2
1
41
40
39
PC1 PA1 N/C N/C N/C PA2 PA3 PA4 PB6 PB5
6 36 7 35 8 34 9
VDD
38
CLK
RIN
PC0
PC3
CAPS NUM PD7 PD0 PD1 PD2 PD6 PD4 PD3 PD5
10
C O B -0 2 0 9 -1 E
33
32 11 31 12 30 13 29 14 28 15 27 16 17 18 19 20 21 22 23 24 25 26
PA7
PA6
PA5
PA0
PB4
PB3
PB2
PB7
PC2
PB0
PB1
Rev 01 Page 2 of 21
PS2 KEYBOARD CONTROLLER PIN DESCRIPTION
Pin Name PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 PB0 PB1 PB2 PB3 PB4 PB5 PB6 PB7 PC0 PC1 PC2 PC3 PD0 PD1 PD2 PD3 PD4 PD5 PD6 PD7 CLK DATA SCROLL NUM CAPS VDD VSS Rout Rin Pad No. 23 7 11 12 13 21 20 19 18 26 22 17 16 15 14 24 5 6 25 40 33 32 31 28 29 27 30 34 4 3 37 35 36 38 1 2 39 I/O O O O O O O O O O O O O O O O O O O O O I I I I I I I I I/O I/O O O O I I O
I FUNCTION KEYBOARD MATRIX DRIVE AND SENSE INTERFACE
EC3648
Preliminary
Column 1 Low output scan line Column 2 Low output scan line Column 3 Low output scan line Column 4 Low output scan line Column 5 Low output scan line Column 6 Low output scan line Column 7 Low output scan line Column 8 Low output scan line Column 9 Low output scan line Column 10 Low output scan line Column 11 Low output scan line Column 12 Low output scan line Column 13 Low output scan line Column 14 Low output scan line Column 15 Low output scan line Column 16 Low output scan line Column 17 Low output scan line Column 18 Low output scan line Column 19 Low output scan line Reserved for Column 20 Low output scan line Row 0 Input scan line, internal pull high (18K) Row 1 Input scan line, internal pull high (18K) Row 2 Input scan line, internal pull high (18K) Row 3 Input scan line, internal pull high (18K) Row 4 Input scan line, internal pull high (18K) Row 5 Input scan line, internal pull high (18K) Row 6 Input scan line, internal pull high (18K) Row 7 Input scan line, internal pull high (18K) CLOCK line for IBM communication, internal pull high (5K) DATA line for IBM communication, internal pull high (5K) Scroll Lock Indicator NUM Lock Indicator Caps Lock Indicator +5V Power Supply Ground CLOCK output Connect 47K OHM resistor for 4 MHz oscillation
KEYBOARD PS2 INTERFACE (2 PINS)
KEYBOARD LED INTERFACE( 3 PINS )
SYSTEM CLOCK AND POWER SUPPLY( 4 PINS )
Rev 01 Page 3 of 21
PS2 KEYBOARD CONTROLLER FUNCTION DESCRIPTION
Command from the system
EC3648
Preliminary
The system can send commands to the controller at any time. The controller needs to respond within 20 milliseconds, unless the system prevents controller output, when doing self test or executing a RESET. The following are the controller input commands and he actions that controller needs to take.
Set/Reset Status indicators (Hex ED)
Responds ACK. Receives option byte. Responds ACK. Updates status indicators. Return to previous scanning state.
Echo (Hex EE)
Responds with EE hex. Returns to previous scanning state.
Invalid commands (Hex EF and F1)
Responds with EE hex. Returns to previous scanning state.
Select Alternate Scan Code (Hex F0)
Responds ACK. Clears output buffer. Sets the default typematic rate/delay. Clears last typematic key. Receives options key. Responds ACK. Option byte = 01: selects scan code set 1 02: selects scan code set 2 03: selects scan code set 3 - Returns to previous scanning state.
Read ID (Hex F2)
-
Responds with ACK. Discontinues scanning. Sends two ID Bytes. The second byte will be sent within 500 S after first byte. Resumes scanning.
Set Typematic Rate/Delay (Hex F3)
- Responds ACK. - Receives rate/delay value byte. - Responds ACK. - Set rate/delay (* Note1) - Returns to previous scanning state. *Note 1 1. Repeat period = (8+A) x (2B) x 0.00417 seconds A: binary value of bits 2, 1, and 0. B: binary value of bits 4 and 3. 2. Delay = (C+1) x 250 milliseconds
Rev 01 Page 4 of 21
PS2 KEYBOARD CONTROLLER
C: binary value of bits 6 and 5. Bit 7 is always 0.
Bit 4 ~ bit 0 00000 00001 00010 00011 00100 00101 00110 00111 01000 01001 01010 01011 01100 01101 01110 01111 Typematic rate 20% 30.0 26.7 24.0 21.8 20.0 18.5 17.1 16.0 15.0 13.3 12.0 10.9 10.0 9.2 8.6 8.0 bit 4 ~ bit 0 10000 10001 10010 10011 10100 10101 10110 10111 11000 11001 11010 11011 11100 11101 11110 11111
EC3648
Preliminary
3. default rate = 10.9 chars/sec 20% Default delay = 500 mS 20%
Typematic rate 20% 7.5 6.7 6.0 5.5 5.0 4.6 4.3 4.0 3.7 3.3 3.0 2.7 2.5 2.3 2.1 2.0
Enable (Hex F4)
-
Responds with ACK. Clears output buffer. Clears last typematic key. Start scanning. Responds with ACK. Reset all conditions to power-on state. Clears output buffer. Sets the default key type( scan code set 3 only) Set the default typematic rate/delay. Clears last typematic key. Stops scanning. Responds with ACK. Resets all conditions to power-on state. Clears output buffer. Sets the default key type (scan code set 3 only) Set the default typematic rate/delay. Clears last typematic key. Continues scanning. Responds ACK. Clear output buffer. Set all key type (affect only code set 3 operation). F7 : Typematic F8 : Make/Break F9 : Make FA : Typematic/Make/Break Returns to previous scanning rate.
Rev 01 Page 5 of 21
Default Disable ( Hex F5)
Set Default (Hex F6)
Set All Keys (Hex F7, F8, F9, FA)
-
PS2 KEYBOARD CONTROLLER
Set Key Type ( Hex FB,FC,FD )
Responds ACK. Clears output buffer. Receives key ID byte Responds ACK. Sets key ID type (affect only scan code set 3 operation). FB : Typematic FC : Make/Break FD : Make Returns to previous scanning rate.
EC3648
Preliminary
-
Resend ( Hex FE )
- Sends the previous output again. If the previous byte is RESEND, the last byte before RESEND shall be sent.
Reset ( Hex FF )
- Responds ACK. - Checks clock and data lines in the high state for at least 500 microseconds or receives another command. - Default to scan code set 2 .
Command to the system
The following are the keyboard output commands.
Acknowledge ( Hex FA )
The keyboard sends an acknowledge in response to any valid command from the system except for RESEND and ECHO.
BAT Completion Code ( Hex AA )
This command is issued after successful completion of keyboard self test.
BAT Failure Code ( Hex FC )
If a BAT failure occurs, the keyboard sends this code , discontinues scanning, and waits for a system response or reset.
Echo ( Hex EE )
The keyboard sends this code in response to an ECHO command.
Keyboards ID ( Hex 83AB )
The 2 byte ID is issued to respond to READ ID command. The low byte is sent first, followed by the high byte.
Rev 01 Page 6 of 21
PS2 KEYBOARD CONTROLLER
Keyboard buffer Overrun ( Hex 00 or FF )
EC3648
Preliminary
If keyboard buffer overflows, the overrun code will replace the last byte in the buffer. If the keyboard is using scan code set 1 , the code is hex FF. For sets 2 and 3, the code is hex 00.
Resend ( Hex FE )
When the keyboard receives an invalid input or any input with incorrect parity, the RESEND command is sent.
FUNCTION DESCRIPTION Keyboard Scan Code Table
The keyboard contains 3 scan code sets. The system defaults to scan set 2. It's can be switched to set 1 or set 3 . The following tables show the key and three scan code sets in hexadecimal values. All the keys are typematics except for the pause key. When a controller receive the make key frame from RF receiver, the make scan code is sent to the system. When receive the break key frame, its break code is sent. If receives two or more keys frame, only the last key pressed repeats at the typematic rate. Typematic operation stops when receives the break frame, even if other keys are being released or some other keys are still held down.
Rev 01 Page 7 of 21
PS2 KEYBOARD CONTROLLER
The following table shows three scan code sets used in the keyboard.
EC3648
Preliminary
scan code set 1
Key Number And Symbol
1 ~
Make/Break code 29/A9 02/82 03/83 04/84 05/85 06/86 07/87 08/88 09/89 0A/8A 0B/8B 0C/8C 0D/8D 56 7D/D6 FD 0E/8E 0F/8F 10/90 11/91 12/92 13/93 14/94 15/95 16/96 17/97 18/98 19/99 1A/9A 1B/9B 2B/AB 3A/BA 1E/9E 1F/9F 20/A0 21/A1 22/A2 23/A3 24/A4 25/A5 26/A6
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 *29 30 31 32 33 34 35 36 37 38 39
! @ # $ % ^ & * ( ) _ +
1 2 3 4 5 6 7 8 9 0 =
Back Space Tab Q W E R T Y U I O P { [ } ] | \ Caps Lock A S D F G H J K L
Key Number and Symbol 47 X 48 C 49 V 50 B 51 N 52 M 53 < , 54 > . 55 ? / 57 Shift(R) 58 Ctrl(L) 60 Alt(L) 61 Space 62 Alt(R) 64 Ctrl(R) 90 Num Lock 91 7 Home 92 4 93 1 End 96 8 97 5 98 2 99 0 Ins 100 * 101 9 PgUp 102 6 103 3 PgDn 104 . Del 105 106 + 107 108 Enter 110 ESC 112 F1 113 F2 114 F3 115 F4 116 F5 117 F6
Make/Break code 2D/AD 2E/AE 2F/AF 30/B0 31/B1 32/B2 33/B3 34/B4 35/B5 36/B6 1D/9D 38/B8 39/B9 E0 38/E0 B8 E0 1D/E0 9D 45/C5 47/C7 4B/CB 4F/CF 48/C8 4C/CC 50/D0 52/D2 37/B7 49/C9 4D/CD 51/D1 53/D3 4A/CA 4E/CE 7E/FE E0 1C/E0 9C 01/81 3B/BB 3C/BC 3D/BD 3E/BE 3F/BF 40/C0
Rev 01
Page 8 of 21
PS2 KEYBOARD CONTROLLER
40 : ; 41 " ` **42 | \ 43 Enter 44 Shift(L) **45 Macro 46 Z *101-Key Keyboard Only **102-Key Keyboard Only 27/A7 28/A8 2B/AB 1C/9C 2A/AA 56/D6 2C/AC 118 119 120 121 122 123 125 F7 F8 F9 F10 F11 F12 Scroll Lock
EC3648
Preliminary
41/C1 42/C2 43/C3 44/C4 57/D7 58/D8 46/C6
E0 52 /E0 D2 76 Delete E0 53 /E0 D3 79 E0 4B /E0 CB 80 Home E0 47 /E0 C7 81 End E0 4F /E0 CF 83 E0 48 /E0 C8 84 E0 50 /E0 D0 85 PgUp E0 49 /E0 C9 86 PgDn E0 51 /E0 D1 89 E0 4D /E0 CD 59 L-WIN E0 5B /E0 DB 63 R-WIN E0 5C /E0 DC 127 APP E0 5D /E0 DD When both shift keys are held down Key number : 75
Key Number And Symbol 75 Insert
Base case Shift+Num
Left-Shift
Right-Shift
Num Lock E0 2A E0 52 /E0 D2 E0 AA E0 2A E0 53 /E0 D3 E0 AA E0 2A E0 4B /E0 CB E0 AA E0 2A E0 47 /E0 C7 E0 AA E0 2A E0 4F /E0 CF E0 AA E0 2A E0 48 /E0 C8 E0 AA E0 2A E0 50 /E0 D0 E0 AA E0 2A E0 49 /E0 C9 E0 AA E0 2A E0 51 /E0 D1 E0 AA E0 2A E0 4D /E0 CD E0 AA E0 2A E0 5B /E0 DB E0 AA E0 2A E0 5C /E0 DC E0 AA E0 2A E0 5D /E0 DD E0 AA
E0 AA E0 52 E0 B6 E0 52 /E0 D2 E0 2A /E0 D2 E0 36 E0 AA E0 53 E0 B6 E0 53 /E0 D3 E0 2A /E0 D3 E0 36 E0 AA E0 4B E0 B6 E0 4B /E0 CB E0 2A /E0 CB E0 36 E0 AA E0 47 E0 B6 E0 47 /E0 C7 E0 2A /E0 C7 E0 36 E0 AA E0 4F E0 B6 E0 4F /E0 CF E0 2A /E0 CF E0 36 E0 AA E0 48 E0 B6 E0 48 /E0 C8 E0 2A /E0 C8 E0 36 E0 AA E0 50 E0 B6 E0 50 /E0 D0 E0 2A /E0 D0 E0 36 E0 AA E0 49 E0 B6 E0 49 /E0 C9 E0 2A /E0 C9 E0 36 E0 AA E0 51 E0 B6 E0 51 /E0 D1 E0 2A /E0 D1 E0 36 E0 AA E0 4D E0 B6 E0 4D /E0 CD E0 2A /E0 CD E0 36 E0 AA E0 5B E0 B6 E0 5B /E0 DB E0 2A /E0 DB E0 36 E0 AA E0 5C E0 B6 E0 5C /E0 DC E0 2A /E0 DC E0 36 E0 AA E0 5D E0 B6 E0 5D /E0 DD E0 2A /E0 DD E0 36 Both Shift E0 AA E0 B6 E0 52 /E0 D2 E0 2A E0 36
Rev 01 Page 9 of 21
PS2 KEYBOARD CONTROLLER
EC3648
Preliminary
Base E0 35 /E0 B5 When both shift keys are held down Key number: 95
Key Number And Symbol 95 /
Left-Shift E0 AA E0 35 /E0 B5 E0 2A
Right-Shift E0 B6 E0 35 /E0 B5 E0 36 Both Shift E0 AA E0 B6 E0 35 /E0 B5 E0 2A E0 36
Key Number And Symbol 124 Print Screen
Base E0 2A E0 37 /E0 B7 E0 AA
Shift/Ctrl E0 37 /E0 B7
Alt 54 /D4
Key Number And Symbol 126
Base
Ctrl
Pause E1 1D 45 E1 9D C5 E0 46 E0 C6 This key is not typematic,all associated scan codes occur on the make code.
Key Number Make/Break code
And Function
Default Make/Break Make/Break Make/Break Default MAKE MAKE TYPEMATIC TYPEMATIC
ACPI ACPI ACPI
Power Sleep Wake up
E0 5E/E0 DE E0 5F/E0 DF E0 63/E0 E3 Make/Break code
Key Number
Korea KOR0 Korea KOR1 Brazil BA0 Brazil BA1
F1/F0/73/F3 7E/FE
Rev 01 Page 10 of 21
PS2 KEYBOARD CONTROLLER scan code set 2
Key Number And Symbol
1 ~
EC3648
Preliminary
Make/Break code 0E/F0 0E 16/F0 16 1E/F0 1E 26/F0 26 25/F0 25 2E/F0 2E 36/F0 36 3D/F0 3D 3E/F0 3E 46/F0 46 45/F0 45 4E/F0 4E 55/F0 55 6A/F0 6A 66/F0 66 0D/F0 0D 15/F0 15 1D/F0 1D 24/F0 24 2D/F0 2D 2C/F0 2C 35/F0 35 3C/F0 3C 43/F0 43 44/F0 44 4D/F0 4D 54/F0 54 5B/F0 5B 5D/F0 5D 58/F0 58 1C/F0 1C 1B/F0 1B 23/F0 23 2B/F0 2B 34/F0 34 33/F0 33 3B/F0 3B 42/F0 42 4B/F0 4B 4C/F0 4C 52/F0 52 5D/F0 5D
Key Number and Symbol 47 48 49 50 51 52 53 54 55 57 58 60 61 62 64 90 91 92 93 96 97 98 99 100 101 102 103 104 105 106 107 108 110 112 113 114 115 116 117 118 119 120 X C V B N M < > ? , . / Shift(R) Ctrl(L) Alt(L) Space Alt(R) Ctrl(R) Num Lock 7 Home 4 1 End 8 5 2 0 Ins * 9 PgUp 6 3 PgDn . Del + Enter ESC F1 F2 F3 F4 F5 F6 F7 F8 F9
Make/Break code 22/F0 22 21/F0 21 2A/F0 2A 32/F0 32 31/F0 31 3A/F0 3A 41/F0 41 49/F0 49 4A/F0 4A 59/F0 59 14/F0 14 11/F0 11 29/F0 29 E0 11/E0 F0 11 E0 14/E0 F0 14 77/F0 77 6C/F0 6C 6B/F0 6B 69/F0 69 75/F0 75 73/F0 73 72/F0 72 70/F0 70 7C/F0 7C 7D/F0 7D 74/F0 74 7A/F0 7A 71/F0 71 7B/F0 7B 79/F0 79 6D/F0 6D E0 5A/E0 F0 5A 76/F0 76 05/F0 05 06/F0 06 04/F0 04 0C/F0 0C 03/F0 03 0B/F0 0B 83/F0 83 0A/F0 0A 01/F0 01
Rev 01
2 ! 1 3 @ 2 4 # 3 5 $ 4 6 % 5 7 ^ 6 8 & 7 9 * 8 10 ( 9 11 ) 0 12 _ 13 + = 14 15 Back Space 16 Tab 17 Q 18 W 19 E 20 R 21 T 22 Y 23 U 24 I 25 O 26 P 27 { [ 28 } ] *29 | \ 30 Caps Lock 31 A 32 S 33 D 34 F 35 G 36 H 37 J 38 K 39 L 40 : ; 41 " ` **42 | \
Page 11 of 21
PS2 KEYBOARD CONTROLLER
43 Enter 5A/F0 5A 44 Shift(L) 12/F0 12 **45 Macro 61/F0 61 46 Z 1A/F0 1A *101-Key Keyboard Only **102-Key Keyboard Only 121 122 123 125 F10 F11 F12 Scroll Lock
EC3648
Preliminary
09/F0 09 78/F0 78 07/F0 07 7E/F0 7E
Key Number And Symbol 75 Insert 76 79 80 81 83 84 85 86 89 59 63 127 Delete Home End PgUp PgDn L-WIN R-WIN APP
Base case Shift+Num E0 70 /E0 F0 70 E0 71 /E0 F0 71 E0 6B /E0 F0 6B E0 6C /E0 F0 6C E0 69 /E0 F0 69 E0 75 /E0 F0 75 E0 72 /E0 F0 72 E0 7D /E0 F0 7D E0 7A /E0 F0 7A E0 74 /E0 F0 74 E0 1F /E0 F0 1F E0 27 /E0 F0 27 E0 2F /E0 F0 2F
Left-Shift
Right-Shift
Num Lock E0 12 E0 70 /E0 F0 70 E0 F0 12 E0 12 E0 71 /E0 F0 71 E0 F0 12 E0 12 E0 6B
/E0 F0 6B E0 F012
E0 F0 12 E0 70 E0 F0 59 E0 70 /E0 F0 70 E0 12 /E0 F0 70 E0 59 E0 F0 12 E0 71 /E0 F0 71 E0 12 E0 F0 12 E0 6B /E0 F0 6B E0 12 E0 F0 12 E0 6C /E0 F0 6C E0 12 E0 F0 12 E0 69 /E0 F0 69 E0 12 E0 F0 12 E0 75 /E0 F0 75 E0 12 E0 F0 12 E0 72 /E0 F0 72 E0 12 E0 F0 12 E0 7D
/E0 F0 7D E0 12
E0 F0 59 E0 71 /E0 F0 71 E0 59 E0 F0 59 E0 6B /E0 F0 6B E0 59 E0 F0 59 E0 6C /E0 F0 6C E0 59 E0 F0 59 E0 69 /E0 F0 69 E0 59 E0 F0 59 E0 75 /E0 F0 75 E0 59 E0 F0 59 E0 72 /E0 F0 72 E0 59 E0 F0 59 E0 7D
/E0 F0 7D E0 59
E0 12 E0 6C
/E0 F0 6C E0 F0 12
E0 12 E0 69 /E0 F0 69 E0 F0 12 E0 12 E0 75 /E0 F0 75 E0 F0 12 E0 12 E0 72 /E0 F0 72 E0 F0 12 E0 12 E0 7D
/E0 F0 7D E0 F0 12
E0 F0 12 E0 7A
/E0 F0 7A E0 12
E0 F0 59 E0 7A
/E0 F0 7A E0 59
E0 12 E0 7A
/E0 F0 7A E0 F0 12
When both shift keys are held down key number :75
E0 F0 12 E0 74 E0 F0 59 E0 74 /E0 F0 74 E0 12 /E0 F0 74 E0 59 E0 F0 12 E0 1F E0 F0 59 E0 1F /E0 F0 1F E0 12 /E0 F0 1F E0 59 E0 F0 12 E0 27 E0 F0 59 E0 27 /E0 F0 27 E0 12 /E0 F0 27 E0 59 E0 F0 12 E0 2F E0 F0 59 E0 2F /E0 F0 2F E0 12 /E0 F0 2F E0 59 Both Shift E0 F0 12 E0 F0 59 E0 70 /E0 F0 70 E0 12 E0 59
E0 12 E0 74 /E0 F0 74 E0 F0 12 E0 12 E0 1F /E0 F0 1F E0 F0 12 E0 12 E0 27 /E0 F0 27 E0 F0 12 E0 12 E0 2F /E0 F0 2F E0 F0 12
Rev 01 Page 12 of 21
PS2 KEYBOARD CONTROLLER
EC3648
Preliminary
E0 4A /E0 F0 4A When both shift keys are held down Key number: 95 Key Number And Symbol 124 Print Screen
Key Number And Symbol 95 /
Base
Left-Shift
Right-Shift
E0 F0 12 E0 4A E0 F0 59 E0 4A /E0 F0 4A E0 12 /E0 F0 4A E0 59 Both Shift E0 F0 12 E0 F0 59 E0 4A /E0 F0 4A E0 12 E0 59
Base E0 12 E0 7C /E0 F0 7C E0 F0 12
Shift/Ctrl E0 7C /E0 F0 7C
Alt 84 /F0 84
Key Number And Symbol Base Ctrl 126 Pause E1 14 77 E1 F0 14 F0 77 E0 7E E0 F0 7E This key is not typematic , all associated scan codes occur on the make code.
Key Number Make/Break code
And Function
Default Make/Break Make/Break Make/Break Default MAKE MAKE TYPEMATIC TYPEMATIC
ACPI ACPI ACPI
Power Sleep Wake up
E0 37/E0 F0 37 E0 3F/E0 F0 3F E0 5E/E0 F0 5E Make/Break code
Key Number
Korea KOR0 Korea KOR1 Brazil BA0 Brazil BA1
F1/F2/51/F0 51 6D/F0 6D
Rev 01 Page 13 of 21
PS2 KEYBOARD CONTROLLER scan code set 3
Key Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 *29 30 31 32 33 34 35 36 37 38 39 40 41 **42 43 Make /Break code 0E/F0 0E 16/F0 16 1E/F0 1E 26/F0 26 25/F0 25 2E/F0 2E 36/F0 36 3D/F0 3D 3E/F0 3E 46/F0 46 45/F0 45 4E/F0 4E 55/F0 55 5D/F0 5D 66/F0 66 0D/F0 0D 15/F0 15 1D/F0 1D 24/F0 24 2D/F0 2D 2C/F0 2C 35/F0 35 3C/F0 3C 43/F0 43 44/F0 44 4D/F0 4D 54/F0 54 5B/F0 5B 5C/F0 5C 14/F0 14 1C/F0 1C 1B/F0 1B 23/F0 23 2B/F0 2B 34/F0 34 33/F0 33 3B/F0 3B 42/F0 42 4B/F0 4B 4C/F0 4C 52/F0 52 53/F0 53 5A/F0 5A Default Key State Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Make/Break Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Key Number 55 57 58 59 60 61 62 63 64 75 76 79 80 81 83 84 85 86 89 90 91 92 93 95 96 97 98 99 100 101 102 103 104 105 106 107 108 110 112 113 114 115 116 Make /Break code 4A/F0 4A 59/F0 59 11/F0 11 8B/F0 8B 19/F0 19 29/F0 29 39/F0 39 8C/F0 8C 58/F0 58 67/F0 67 64/F0 64 61/F0 61 6E/F0 6E 65/F0 65 63/F0 63 60/F0 60 6F/F0 6F 6D/F0 6D 6A/F0 6A 76/F0 76 6C/F0 6C 6B/F0 6B 69/F0 69 77/F0 77 75/F0 75 73/F0 73 72/F0 72 70/F0 70 7E/F0 7E 7D/F0 7D 74/F0 74 7A/F0 7A 71/F0 71 84/F0 84 7C/F0 7C 7B/F0 7B 79/F0 79 08/F0 08 07/F0 07 0F/F0 0F 17/F0 17 1F/F0 1F 27/F0 27
EC3648
Preliminary
Default Key State Typematic Make/Break Make/Break Make/Break Make/Break Typematic Make Only Make/Break Make Only Make Only Typematic Typematic Make Only Make Only Typematic Typematic Make Only Make Only Typematic Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Typematic Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only
Rev 01
Page 14 of 21
PS2 KEYBOARD CONTROLLER
44 12/F0 12 **45 13/F0 13 46 1A/F0 1A 47 22/F0 22 48 21/F0 21 49 2A/F0 2A 50 32/F0 32 51 31/F0 31 52 3A/F0 3A 53 41/F0 41 54 49/F0 49 *101-Key Keyboard Only **102-Key Keyboard Only Make/Break Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic 117 118 119 120 121 122 123 124 125 126 127 2F/F0 2F 37/F0 37 3F/F0 3F 47/F0 47 4F/F0 4F 56/F0 56 5E/F0 5E 57/F0 57 5F/F0 5F 62/F0 62 8D/F0 8D
EC3648
Preliminary
Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make/Break
Make/Break code
Key Number
Default MAKE MAKE TYPEMATIC TYPEMATIC
Korea KOR0 Korea KOR1 Brazil BA0 Brazil BA1
F1/F2/51/F0 51 7B/F0 7B
KEY CODE
Key mark and Key no Code Set 2
Code Set 1
Code Set 3 Make/Break 5D/F0 5D 51/F0 51 85/F0 85 86/F0 86 87/F0 87
DEFAULT
Make/Break
Make/Break
Japannese J14 Japannese J56 Japannese J131 Japannese J132 Japannese J133
56 7D/D6 FD 73/F3 7B/FB 79/F9 70/F0
6A/F0 6A 51/F0 51 67/F0 67 64/F0 64 13/F0 13
TYPEMATIC TYPEMATIC MAKE MAKE MAKE
Rev 01 Page 15 of 21
PS2 KEYBOARD CONTROLLER
WIN 2K MEDIA CODES
Item
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
EC3648
Preliminary
Extra Key Function Set1 Name MAKE
BACK FORWARD STOP REFRESH SEARCH FAVORITES HOME MAIL MUTE VOLUMEVOLUME+ PREVIOUS STOP PLAY NEXT MEDIA CALCULATOR MY COMPUTOR E0 6A E0 69 E0 68 E0 67 E0 65 E0 66 E0 32 E0 6C E0 20 E0 2E E0 30 E0 10 E0 24 E0 22 E0 19 E0 6D E0 21 E0 6B
Set 2,3
BREAK E0 EA E0 E9 E0 E8 E0 E7 E0 E5 E0 E6 E0 B2 E0 EC E0 A0 E0 AE E0 B0 E0 90 E0 A4 E0 A2 E0 99 E0 ED E0 A1 E0 EB MAKE E0 38 E0 30 E0 28 E0 20 E0 10 E0 18 E0 3A E0 48 E0 23 E0 21 E0 32 E0 15 E0 3B E0 34 E0 4D E0 50 E0 2B E0 40 BREAK E0 F0 38 E0 F0 30 E0 F0 28 E0 F0 20 E0 F0 10 E0 F0 18 E0 F0 3A E0 F0 48 E0 F0 23 E0 F0 21 E0 F0 32 E0 F0 15 E0 F0 3B E0 F0 34 E0 F0 4D E0 F0 50 E0 F0 2B E0 F0 40
New key codes for scan set 1
New Key
WIN_L WIN_R APP N-CHG (131) CHG (132) ROMA (133) K14 K56 K107 KL KR POWER SLEEP WAKE UP Make E0 5B E0 5C E0 5D 7B 79 70 7D 73 7E F1 F0 E0 5E E0 5F E0 63 Break E0 DB E0 DC E0 DD FB F9 F0 FD F3 FE X X E0 DE E0 DF E0 E3
Rev 01 Page 16 of 21
PS2 KEYBOARD CONTROLLER
EC3648
Preliminary
New key codes for scan set 2
New Key WIN_L WIN_R APP N-CHG (131) CHG (132) ROMA (133) K14 K56 K107 KL KR POWER SLEEP WAKE UP Make E0 1F E0 27 E0 2F 67 64 13 6A 51 6D F1 F2 E0 37 E0 3F E0 5E Break E0 F0 1F E0 F0 27 E0 F0 2F E0 67 E0 64 E0 13 E0 6A E0 51 E0 6D X X E0 F0 37 E0 F0 3F E0 F0 5E
New Key codes for scan set 3
New Key WIN_L WIN_R APP N-CHG (131) CHG (132) ROMA (133) K14 K56 K107 KL KR POWER SLEEP WAKE UP
Make
8B 8C 8D 85 86 87 5D 51 7B F1 F2 X X X
Break F0 8B F0 8C F0 8D F0 85 F0 86 F0 87 F0 5D F0 51 F0 7B X X X X X
Key Type Make/break Make/break Make/break Make Make Make Typematic Typematic Typematic
Rev 01 Page 17 of 21
PS2 KEYBOARD CONTROLLER ABSOLTE MAXIMUM RATING
Parameter Input Voltage Output Voltage Temperature under bias Storage temperature Sym. VIN VOUT TB TS
EC3648
Preliminary
Ratings -0.3V to +6V -0.3V to +6V 0 to 70 -65 to 150
DC ELECTRICAL CHARACTERISTICS
Parameter Operating voltage Operating Supply current Input Leakage Current Input high voltage (Ports 6) Input low voltage (Ports 6) Output high voltage (Ports 5) Output low voltage (Ports 5) Output low voltage for LEDs Internal Pull-high resistance for DATA, CLK Output low voltage for DATA CLK Sym. Min. Typ. Max. Unit VCC ICC1 IIN VIH VIL VOH VOL1 VOL2 RPH VOL3 3.5 5 2.4 0.4 0.4 7 0.4 2.0 0.8 4.5 5.5 2.2 1 V mA A V V V V V K V IOH=-10.0mA IOL1=9.0mA IOL2=14.0mA VPH=0V IOL=5mA VIN=VCC, VSS Condition
AC ELECTRICAL CHARACTERISTICS
Parameter Time from DATA transition to falling edge of CLK Time from rising of CLK to DATA transition Duration of CLK inactive Sym. T1 T2 T3 Min. 5 5 30 30 40 40 Typ. Max. 25 T4-5 50 50 50 5 4.00 25 Unit. S S S S S S MHz
Duration of CLK active T4 Time to auxiliary device inhibit after clock 11 to ensure T5 the auxiliary device does not start another transmission Time from inactive to active CLK transition, used to time T6 when auxiliary device sample DATA System clock FCLK
Rev 01 Page 18 of 21
PS2 KEYBOARD CONTROLLER
EC3648
Preliminary
KEY MATRIX
R0 S0 S1 S2 S3 S4 S5
PAUSE Q W E R U K92 K97 O K102 P K105 SCROLL NEXT BACK SPACE 4 | \ 1 END
2
R1
R2
R3
R4
CTRL (R)
R5
R6
CTRL (L)
R7
F5 ! 1 @ 2 # 3 $ 4 & 7 * 8 ( 9 ) 0 K 91 K96 K101 K100
TAB CAPS F3 T Y } ] F7 { [
A S
ESC
Z X
K131 K132 K133 B N BA0 APP K104 ? / K95
~ F1 F2 % 5 ^ 6
K45 D F J K93 K K98 L K103 : ; " K106 ALT(L) F11 K42 (WWW) SEARCH F4 G H F6 C V M K99 < , K107 > .
S6 S7 S8 S9 S10 S11 S12
+ =
F8
ALT(R) PREV F9
PRINT F10
ENTER (L) F12 NUM LOCK
K14 7 HOME
8
SPACE 5
6
Delete / Insert
KOR0 KOR1
0 Ins . Del
S13 S14 S15
9 PgUp +
3 PgDn ENTER(R) SHIFT (R) PLAY WIN(R) STOP
*
Page Up Home
Page Down End VOL+
BA1 SHIFT (L)
SLEEP
(WWW) BACK (WWW) STOP
(WWW)
FAVORITE
(WWW) HOME (WWW) MAIL MEDIA
S16
POWER
WIN(L) CAL WAKE
S17 S18
MY COM VOL-
(WWW) (WWW) FORWARD REFRESH
MUTE
Rev 01 Page 19 of 21
PS2 KEYBOARD CONTROLLER
EC3648
Preliminary
TIMING DIAGRAMS
Keyboard to Host
CLK
1ST CLK
T4 T5 T2
2nd CLK
10th CLK
11th CLK
T3 Tl
DATA
Start Bit
Bit 0
Parity Bit
Stop Bit
Host to Keyboard
CLK
I/O Inhidit 1ST CLK
T4 T3 T6
2nd CLK
9th CLK
10th CLK
11th CLK
DATA
Start Bit
Bit 0
Parity Bit
Stop Bit
Rev 01 Page 20 of 21
PS2 KEYBOARD CONTROLLER APPLICATION CIRCUIT
EC3648
Preliminary
ORDERING INFORMATION
E-CMOS CORPORATION IC DATASHEET ADDRESS: No.1, Creation RD. 2nd, science-based industrial park, Hsin-Chu 300, Taiwan, R.O.C. website: http://www.ecmos.com.tw E-mail : sales@ecmos.com.tw TEL: 886-3-5783622 FAX:886-3-5783630
Rev 01 Page 21 of 21

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