HT82K628A
Windows 2000 PS/2 Keyboard Encoder
Features
· Design for Windows 95/98/NT/2000/XP
· 101/102/104/105/107/109 keys or other special ap-
plication keyboard encoder
· Supports WindowsTM keys
· Supports PC/AT and PS/2 code set 1, 2, 3
· 8 external hot keys
· Supports Japanese , Korean , Brazilian and
· Supports Mini-keyboard and Internet/Multimedia
keyboard
European
· WINDOWS is a registered trademark of Microsoft
· RC oscillator
corporation
· Phantom key detection
· 40-pin DIP package
· Low power consumption
General Description
An inexpensive RC oscillator can be used for the system
clock. Simple implementation of this device is an advantage for high performance and low cost keyboard applications.
The HT82K628A is a keyboard encoder designed for
IBM PC/AT, IBM PS/2 and all compatible machines.
The HT82K628A accepts keyboard inputs and provides
a 16-character first-in-first-out buffer in which data is
stored.
Pin Assignment
R 5
1
4 0
R 6
R 4
2
3 9
R 7
C 3
3
3 8
C 4
C 2
4
3 7
C 5
C 1
5
3 6
C 6
C 0
6
3 5
C 7
R 3
7
3 4
N C
R 2
8
3 3
O S C 1
R 1
9
3 2
V D D
R 0
1 0
3 1
R E S E T
R 1 9
1 1
3 0
C A P S
R 1 8
1 2
2 9
R 8
R 1 7
1 3
2 8
R 9
R 1 6
1 4
2 7
R 1 0
V S S
1 5
2 6
R 1 1
S C R O L L
1 6
2 5
R 1 2
N U M
1 7
2 4
R 1 3
D A T A
1 8
2 3
R 1 4
C L O C K
1 9
2 2
R 1 5
F n S e le c t
2 0
2 1
M a c r o K e y s e le c t
H T 8 2 K 6 2 8 A
4 0 D IP -A
Rev. 1.60
1
April 16, 2004
HT82K628A
Pin Description
Pin No.
Pin Name
I/O
Description
10~7, 2~1,
40~39, 29~22, R0~R19
14~11
O
Keyboard matrix scanning output pins
6~3, 38~35
C0~C7
I
Keyboard matrix scanning input pins
15
VSS
¾
Negative power supply, ground
16
SCROLL
O
Scroll Lock indicator
17
NUM
O
Num Lock indicator
18
DATA
I/O
Bidirectional data transmission line
19
CLOCK
I/O
Synchronous clock signal. Used to clock the transmission data.
20
Fn Select
I
Mini-keyboard select, enables the function if connected to VSS.
21
Macro Key Select
I
Macro Key select, disables the function if connected to VSS.
30
CAPS
O
Caps Lock indicator
31
RESET
I
Chip reset input. Active low. Built-in power-on reset circuit to reset the entire chip. Chip can also be externally reset via RESET pin.
32
VDD
33
OSC1
34
NC
¾
I
¾
5.0V positive power supply
System clock input; 58.3kW resistor connected for RC OSC
No connection
Absolute Maximum Ratings
Supply Voltage ..........................VSS-0.3V to VSS+5.5V
Storage Temperature ...........................-50°C to 125°C
Input Voltage .............................VSS-0.3V to VDD+0.3V
Operating Temperature ..........................-25°C to 70°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
Electrical Characteristics
Symbol
Ta=25°C
Test Conditions
Parameter
VDD
Conditions
Min. Typ. Max. Unit
VDD
Operating Voltage
¾
¾
3
5
5.25
V
IDD
Operating Current (RC OSC)
5V
No load, fSYS= 4MHz
¾
2.5
5
mA
VIL
Input Low Voltage
5V
¾
0
¾
1.5
V
VIH
Input High Voltage
5V
¾
3.5
¾
5
V
IOL
Sink Current (C0~C7, R0~R19, DATA, CLOCK)
5V
VOL= 0.5V
16
25
¾
mA
IOH1
Source Current (C0~C7, R0~R19)
5V
VOH= 4.5V
-8
-16
¾
mA
IOH2
Source Current (Scroll, Num, Caps)
5V
VOH= 4.5V
-2.5
-4
¾
mA
ILED
LED Sink Current (Scroll, Num, Caps)
5V
VOL=3.4V
10
18
24
mA
Rph
Internal Pull-high Resistance (C0~C7, R0~R19)
5V
¾
5
12
20
kW
Rph1
Internal Pull-high Resistance (DATA, CLOCK)
5V
¾
2
4.7
8
kW
Rph2
Internal Pull-high Resistance (RESET)
5V
¾
25
50
75
kW
fSYS
System Clock (RC OSC)
5V
¾
¾
4
¾
MHz
Rev. 1.60
2
April 16, 2004
HT82K628A
Functional Description
Command from the Host
The HT82K628A responds to the option byte with ACK,
sets the indicators and if the HT82K628A was previously
enabled, continues scanning. The status of the indicators will reflect the bits in the option byte and can be activated or deactivated in any combination. If another
command is received in place of the option byte, execution of the Set/Reset Mode Indicators command is
stopped, with no change to the indicator status, and the
new command is processed.
The following table shows the commands that the host
may send and their hexadecimal values.
Command
Hex Value
Set/Reset Status Indicators
ED
Echo
EE
Invalid Command
EF
Select Alternate Scan Codes
F0
Invalid Command
F1
Read ID
F2
Set Typematic Rate/Delay
F3
Enable
F4
Default Disable
Immediately after power-on, the lights default to the off
state. If the Set Default and Default Disable commands
are received, the lamps remain in the state they were in
before the command was received.
EEH - Echo
Echo is a diagnostic aid. When the HT82K628A receives this command, it issues a hex EE response and if
the HT82K628A was previously enabled, continues
scanning.
F5
Set Default
F6
Set All Keys - Typematic
F7
Set All Keys - Make/Break
F8
EFH and F1H - Invalid Command
Set All Keys - Make
F9
Set All Keys - Typematic/Make/Break
FA
EFh and F1h are invalid commands and are not supported. If HT82K628A receives one of these and sends
it, the HT82K628A will not acknowledge the command,
but returns a Resend command and continues in its previous scanning state.
Set Key Type - Typematic
FB
Set Key Type - Make/Break
FC
Set Key Type - Make
FD
F0H - Select Alternate Scan Codes
Resend
FE
Reset
FF
This command instructs the HT82K628A to select one of
the three sets of scan codes. The HT82K628A acknowledges receipt of this command with ACK, clears both
the output buffer and the typematic key. The host then
sends the option byte and the keyboard responds with
another ACK. An option byte value of hex 01 selects
scan code set 1, hex 02 selects set 2 and hex 03 selects
code set3.
The commands may be sent to the HT82K628A at any
time and the HT82K628A will respond within 25ms except when performing the internal diagnostics or executing a Reset command.
EDH - Set/Reset Status Indicators
An option byte value of hex 00 causes the HT82K628A
to acknowledge with ACK and sends a byte telling the
host which scan code set is currently in use.
Three status indicators on the keyboard-Num Lock,
Caps Lock, and Scroll Lock-are accessible by the host.
The HT82K628A activates or deactivates these indicators when it receives a valid command-code sequence
from the system. The command sequence begins with
the command byte (hex ED). The HT82K628A responds
to the command byte with ACK, discontinues scanning,
assignments for this option byte are as follow:
Bit
After establishing the new scan code set, the
HT82K628A returns to the scanning state it was in before receiving the Select Alternate Scan Codes command.
F2H - Read ID
Indicator
0
Scroll Lock Indicator
1
Num Lock Indicator
2
Caps Lock Indicator
3~7
Reserved (Must be 0)
This command requests identification information from
the HT82K628A. The HT82K628A responds with ACK,
discontinues scanning and sends the two keyboard ID
bytes hex 83h and Abh. After the output of the second ID
byte, the HT82K628A resumes scanning.
If a bit for an indicator is set to 1, the indicator is turned
on. If a bit is set to 0, the indicator is turned off.
Rev. 1.60
3
April 16, 2004
HT82K628A
F3H - Set Typematic Rate/Delay
F4H - Enable
The host issues the Set Typematic Rate/Delay command to change the typematic rate and delay. The
HT82K628A responds to the command with ACK, stops
scanning and waits for the system to issue the rate/delay value byte. The HT82K628A responds to the value
byte with another ACK, sets the rate and delay to the
value indicated, and continues scanning (if it was previously enabled). Bit6 and 5 indicate the delay, and bits 4,
3, 2, 1 and 0 indicate the rate. Bit7 is always 0. The delay
is equal to 1 plus the binary value bit 6 and 5, multiplied
by 250ms±20%.
Upon receipt of this command, the HT82K628A will respond with ACK, clears its output buffer, clears the last
typematic key, and starts scanning.
F5H - Default Disable
The Default Disable command resets all conditions to
the power on default states. The HT82K628A will respond with ACK, clears its output buffer, sets the default
key types (scan code set 3 operation only) and
typematic rate/delay, and clears the last typematic key.
The HT82K628A then stops scanning and awaits further
command.
The period (interval from one typematic output to the
next) is determined by the following equation:
F6H - Set Default
The Set Default command resets all conditions to the
power on default states. The HT82K628A will respond
with ACK, clears its output buffer, sets the default key
types (scan code set 3 operation only) and typematic
rate/delay, and clears the last typematic key then continues scanning.
Period = (8+A)*(2^B)*0.00417 seconds.
Where:
A = binary value of bits 2, 1, and 0.
B = binary value of bits 4, and 3.
The typematic rate is 1 for each period and are listed as
follows:
F7H, F8H, F9H, FAH - Set All Keys
Bit
Typematic
Rate ± 20%
Bit
Typematic
Rate ± 20%
00000
30.0
10000
7.5
Hex Value
00001
26.7
10001
6.7
F7
Set All Keys-Typematic
00010
24.0
10010
6.0
F8
Set All Keys-Make/Break
00011
21.8
10011
5.5
F9
Set All Keys-Make
FA
Set All Keys-Typematic/Make/Break
These commands instruct the HT82K628A to set all
keys to the type listed below:
Command
00100
20.0
10100
5.0
00101
18.5
10101
4.6
00110
17.1
10110
4.3
00111
16.0
10111
4.0
01000
15.0
11000
3.7
01001
13.3
11001
3.3
FBH, FCH, FDH - Set Key Type
01010
12.0
11010
3.0
01011
10.9
11011
2.7
These commands instruct the HT82K628A to set individual keys to the type listed below:
01100
10.0
11100
2.5
Hex Value
01101
9.2
11101
2.3
FB
Set Key Type-Typematic
01110
8.0
11110
2.1
FC
Set Key Type-Make/Break
FD
Set Key Type-Make
01111
8.0
11111
The HT82K628A will respond with ACK, clears its output
buffer, sets all keys to the type indicated by this command, and continues scanning (if it was previously enabled). Although these commands can be sent using
any code set, they affect only scan code set 3 operation.
2.0
The HT82K628A will respond with ACK, clears its output
buffer and prepares to receive key identification. Key
identification is accomplished by the host identifying
each key by its scan code value as defined in scan code
set 3. Only scan code set 3 values are valid for key identification. The type of each identified key is set to the
value indicated by the command. Although these commands can be sent using any code set, they affect only
scan code set 3 operation.
The default values for the HT82K628A are as follows:
Typematic rate= 10.9 characters per second ± 20%
Delay = 500ms±20%
The execution of this command stops without change to
the existing rate if another command is received instead
of the rate/delay value byte.
Rev. 1.60
Command
4
April 16, 2004
HT82K628A
FEH - Resend
AAH - BAT Completion Code
The host sends this command when it detects an error in
any transmission from the HT82K628A. It is sent only after a data transmission and before the host allows the
next data output. When a Resend is received, the
HT82K628A sends the previous output again (unless
the previous output was Resend, in which case the
HT82K628A sends the last byte before the Resend
command).
Following satisfactory completion of the BAT, the
HT82K628A sends AAH. Any other code indicates keyboard failure.
FCH - BAT Failure Code
If a BAT failure occurs, the HT82K628A sends this code,
discontinues scanning and waits for a host response or
reset.
Commands to the Host
FEH - Resend
The following table shows the commands that the
HT82K628A may send to the host, and their hexadeci-
The HT82K628A issues a Resend command following
receipt of an invalid input or any input with incorrect parity. If the host sends nothing to the HT82K628A, no response is required.
mal values.
Command
Hex Value
Key Detection Error/Overrun 00 (Code Set 2 and 3)
Data Communications
Keyboard ID
· Data output
83AB
Bat Completion Code
AA
Bat Failure Core
FC
Echo
EE
Acknowledge
FA
Resend
FE
Key Detection Error/Overrun
If CLK=0, no transmission (keyboard is inhibited).
¨
If CLK=1, DATA=0, no transmission (system request to send).
¨
If CLK=1, DATA=1, transmission permitted.
¨
Data will be valid before the trailing edge and beyond the leading edge of the clock.
¨
The KB checks the clock line for an active level of at
least every 60ms.
¨
If line contention occurs (system brings the clock
low before the tenth clock), set clock=data=high.
FF (Code Set 1)
00H or FFH - Key Detection Error
· Data input
The HT82K628A sends a key detection error character if
conditions in the keyboard make it impossible to identify
a switch closure. If the HT82K628A is using scan code
set 1, the code is FFH. For sets 2 and 3, the code is 00H.
00H or FFH - Overrun
An overrun character is placed in the HT82K628A buffer
and replaces the last code when the buffer capacity has
been exceeded. The code is sent to the host when it
reaches the top of the buffer queue. If the HT82K628A is
using scan code set 1, the code is FFH. For sets 2 and 3,
the code is 00H.
¨
The system overrides the clock line for at least
60ms.
¨
The keyboard checks the clock line state at intervals of 10ms
¨
If a system request-to-send is detected, the keyboard counts 11 data bits.
¨
Data will be valid before the rising edge and beyond
the falling edge
¨
After the 10th bit, the keyboard checks for an active
level on the ²data² line. If the line is active it is forced
to be inactive, and counts one more bit.
Note: This action signals the system that the
keyboard has received its data. Upon
reception of this signal, the system returns
to the ready state, in which it can accept
keyboard outputs or goes to the inhibit
state until it is ready.
83AbH - Keyboard ID
The keyboard ID consists of 2 bytes, Hex 83AbH. The
HT82K628A responds to the Read ID with ACK, discontinues scanning and sends 2 ID bytes. The low byte is
sent first followed by the high byte. Following the output
of Keyboard ID, the HT82K628A begins scanning.
If the keyboard ²data² line is found to be at an inactive
level following the 10th bit, a frame error has occurred,
and the keyboard continues to count until the ²data²
line becomes active. The keyboard then makes the
²data² line inactive and sends a Resend.
EEH - Echo
The HT82K628A sends this code in response to an
Echo command.
Rev. 1.60
¨
5
April 16, 2004
HT82K628A
Data Stream
Mode 1,2,3
start bit
always 0
data bit 0
data bit 1
data bit 2
data bit 3
data bit 4
data bit 5
data bit 6
data bit 7
parity bit
(odd par)
stop bit
always 1
B1:
B2:
b3:
b4:
b5:
B6
b7:
b8:
b9:
b10:
b11:
Note:
The parity bit is either 1 or 0, and the 8 data bits, plus the parity bit, always have an odd number of 1ms.
Key Code Set 1
Key Number
and Symbol
Key Number
and Symbol
Make/Break Code
Make/Break Code
1
~
'
29/A9
47
X
2D/AD
2
!
1
02/82
48
C
2E/AE
3
@
2
03/83
49
V
2F/AF
4
#
3
04/84
50
B
30/B0
5
$
4
05/85
51
N
31/B1
6
%
5
06/86
52
7
^
6
07/87
53
<
8
&
7
08/88
54
>
.
34/B4
9
*
8
09/89
55
?
/
35/B5
10
(
9
0A/8A
57
Shift (R)
36/B6
11
)
0
0B/8B
58
Ctrl (L)
1D/9D
12
_
-
0C/8C
60
Alt (L)
38/B8
13
+
=
14
M
32/B2
,
33/B3
0D/8D
61
Space
39/B9
56 7D/D6 FD
62
Alt (R)
E0 38/E0 B8
E0 1D/E0 9D
15
Back Space
0E/8E
64
Ctrl (R)
16
Tab
0F/8F
90
Num Lock
17
Q
10/90
91
7
Home
47/C7
18
W
11/91
92
4
¬
4B/CB
19
E
12/92
93
1
End
4F/CF
20
R
13/93
96
8
48/C8
21
T
14/94
97
22
Y
15/95
98
2
23
U
16/96
99
0
24
I
17/97
100
25
O
18/98
101
26
P
19/99
5
4C/CC
¯
50/D0
Ins
52/D2
9
PgUp
49/C9
102
6
®
4D/CD
51/D1
*
37/B7
27
{
[
1A/9A
103
3
PgDn
28
}
]
1B/9B
104
.
Del
*29
½
\
2B/AB
105
Rev. 1.60
6
45/C5
-
53/D3
4A/CA
April 16, 2004
HT82K628A
Key Number
and Symbol
Key Number
and Symbol
Make/Break Code
30
Caps Lock
3A/BA
106
31
A
1E/9E
107
32
S
1F/9F
33
D
34
F
35
36
Make/Break Code
+
4E/CE
108
Enter
E0 1C/E0 9C
20/A0
110
ESC
01/81
21/A1
112
F1
3B/BB
G
22/A2
113
F2
3C/BC
H
23/A3
114
F3
3D/BD
37
J
24/A4
115
F4
3E/BE
38
K
25/A5
116
F5
3F/BF
39
L
26/A6
117
F6
40/C0
7E/FE
40
:
;
27/A7
118
F7
41/C1
41
“
‘
28/A8
119
F8
42/C2
**42
½
\
2B/AB
120
F9
43/C3
43
Enter
1C/9C
121
F10
44/C4
44
Shift (L)
2A/AA
122
F11
57/D7
**45
Macro
56/D6
123
F12
58/D8
46
Z
2C/AC
125
Scroll Lock
46/C6
*101-Key Keyboard Only
**102-Key Keyboard Only
Key Number
and Symbol
75
Insert
76
Delete
79
¬
80
Home
81
End
83
84
¯
85
PgUp
86
PgDn
89
®
L Win
R Win
APP
Base Case
Shift+Num
Left-Shift
Right-Shift
Num Lock
E0 52
/E0 D2
E0 53
/E0 D3
E0 4B
/E0 CB
E0 47
/E0 C7
E0 4F
/E0 CF
E0 48
/E0 C8
E0 50
/E0 D0
E0 49
/E0 C9
E0 51
/E0 D1
E0 4D
/E0 CD
E0 AA E0 52
/E0 D2 E0 2A
E0 AA E0 53
/E0 D3 E0 2A
E0 AA E0 4B
/E0 CB E0 2A
E0 AA E0 47
/E0 C7 E0 2A
E0 AA E0 4F
/E0 CF E0 2A
E0 AA E0 48
/E0 C8 E0 2A
E0 AA E0 50
/E0 D0 E0 2A
E0 AA E0 49
/E0 C9 E0 2A
E0 AA E0 51
/E0 D1 E0 2A
E0 AA E0 4D
/E0 CD E0 2A
E0 B6 E0 52
/E0 D2 E0 36
E0 B6 E0 53
/E0 D3 E0 36
E0 B6 E0 4B
/E0 CB E0 36
E0 B6 E0 47
/E0 C7 E0 36
E0 B6 E0 4F
/E0 CF E0 36
E0 B6 E0 48
/E0 C8 E0 36
E0 B6 E0 50
/E0 D0 E0 36
E0 B6 E0 49
/E0 C9 E0 36
E0 B6 E0 51
/E0 D1 E0 36
E0 B6 E0 4D
/E0 CD E0 36
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 5B
/E0 DB
E0 5C
/E0 DC
E0 5D
/E0 DD
E0 AA E0 5B
/E0 DB E0 2A
E0 AA E0 5C
/E0 DC E0 2A
E0 AA E0 5D
/E0 DD E0 2A
E0 B6 E0 5B
/E0 DB E0 36
E0 B6 E0 5C
/E0 DC E0 36
E0 B6 E0 5D
/E0 DD E0 36
E0 2A E0 5B
/E0 DB E0 AA
E0 2A E0 5C
/E0 DC E0 AA
E0 2A E0 5D
/E0 DD E0 AA
When both shift keys are held down:
key number 75
Key Number
and Symbol
95
/
Both Shift
E0 AA E0 B6 E0 52/E0 D2 E0 2A E0 36
Base
Left-Shift
E0 35/E0 B5
E0 AA E0 35/E0 B5 E0 2A E0 B6 E0 35/E0 B5 E0 36
Both Shift
E0 AA E0 B6 E0 35/E0 B5 E0 2A E0 36
When both shift keys are held down: key number 95
Rev. 1.60
Right-Shift
7
April 16, 2004
HT82K628A
Key Number
and Symbol
124
Print Screen
Base
Shift/Ctrl
Alt
E0 2A E0 37/E0 B7 E0 AA
E0 37/E0 B7
54/D4
Key Number
and Symbol
126
Pause
Base
Ctrl
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
and Function
Make/Break code
Default
Make/Break
ACPI
Power
E0 5E/E0 DE
ACPI
Sleep
E0 5F/E0 DF
Make/Break
ACPI
Wake-up
E0 63/E0 E3
Make/Break
Make/Break code
Default
Typematic
Key Number
and Function
56
Brazil BA0
73/F3
131
Japanese J131
7B/FB
Make
132
Japanese J132
79/F9
Make
133
Japanese J133
70/F0
Make
150
Korea KC-L
F1/-
Make
151
Korea KC-R
F0/-
Make
Rev. 1.60
Multimedia Key Function
Make/Break code
E-Mail
E0 6C/E0 EC
WWW Home
E0 32/E0 B2
WWW Favorites
E0 66/E0 E6
WWW Search
E065/E0 E5
WWW Refresh
E0 67/E0 E7
WWW Stop
E0 68/E0 E8
WWW Forward
E0 69/E0 E9
WWW Back
E0 6A/E0 EA
Media
E0 6D/E0 ED
Play/Pause
E0 22/E0 A2
Stop
E0 24/E0 A4
Prev Track
E0 10/E0 90
Next Track
E0 19/E0 99
Volume+
E0 30/E0 B0
Volume-
E0 2E/E0 AE
Mute
E0 20/E0 A0
My Computer
E0 6B/E0 EB
Calculator
E0 21/E0 A1
Screen save
E0 26/E0 A6
Rec
E0 1E/E0 9E
Rew
E0 17/E0 97
Minimize
E0 2D/E0 AD
Eject
E0 11/E0 91
8
April 16, 2004
HT82K628A
Key Code Set 2
Key Number
and Symbol
Key Number
and Symbol
Make/Break Code
Make/Break Code
1
~
'
0E/F0 0E
47
X
22/F0 22
2
!
1
16/F0 16
48
C
21/F0 21
3
@
2
1E/F0 1E
49
V
2A/F0 2A
4
#
3
26/F0 26
50
B
32/F0 32
5
$
4
25/F0 25
51
N
31/F0 31
6
%
5
2E/F0 2E
52
M
3A/F0 3A
7
^
6
36/F0 36
53
<
8
&
7
3D/F0 3D
54
>
.
49/F0 49
9
*
8
3E/F0 3E
55
?
/
4A/F0 4A
10
(
9
46/F0 46
57
Shift (R)
59/F0 59
11
)
0
45/F0 45
58
Ctrl (L)
14/F0 14
12
_
-
4E/F0 4E
60
Alt (L)
11/F0 11
13
+
=
14
,
41/F0 41
55/F0 55
61
Space
29/F0 29
6A/F0 6A
62
Alt (R)
E0 11/E0 F0 11
15
Back Space
66/F0 66
64
Ctrl (R)
E0 14/E0 E0 F0 14
16
Tab
0D/F0 0D
90
Num Lock
77/F0 77
17
Q
15/F0 15
91
7
Home
6C/F0 6C
18
W
1D/F0 1D
92
4
¬
6B/F0 6B
19
E
24/F0 24
93
1
End
69/F0 69
20
R
2D/F0 2D
96
8
75/F0 75
21
T
2C/F0 2C
97
22
Y
35/F0 35
98
2
¯
72/F0 72
23
U
3C/F0 3C
99
0
Ins
70/F0 70
24
I
43/F0 43
100
25
O
44/F0 44
101
9
PgUp
7D/F0 7D
26
P
4D/F0 4D
102
6
®
74/ F0 74
5
73/F0 73
*
7C/F0 7C
27
{
[
54/F0 54
103
3
PgDn
7A/ F0 7A
28
}
]
5B/F0 5B
104
.
Del
71/F0 71
*29
½
\
5D/F0 5D
105
-
7B/F0 7B
30
Caps Lock
58/F0 58
106
+
79/F0 79
31
A
1C/F0 1C
107
32
S
1B/F0 1B
108
Enter
E0 5A/E0 F0 5A
33
D
23/F0 23
110
ESC
76/F0 76
34
F
2B/F0 2B
112
F1
05/F0 05
35
G
34/F0 34
113
F2
06/F0 06
36
H
33/F0 33
114
F3
04/F0 04
37
J
3B/F0 3B
115
F4
0C/F0 0C
38
K
42/F0 42
116
F5
03/F0 03
39
L
4B/F0 4B
117
F6
0B F0 0B
Rev. 1.60
9
6D/F0 6D
April 16, 2004
HT82K628A
Key Number
and Symbol
Key Number
and Symbol
Make/Break Code
Make/Break Code
40
:
;
4C/F0 4C
118
F7
83/F0 83
41
“
‘
52/F0 52
119
F8
0A/F0 0A
**42
½
\
5D/F0 5D
120
F9
01/F0 01
5A/F0 5A
121
F10
09/F0 09
43
Enter
44
Shift (L)
12/F0 12
122
F11
78/F0 78
**45
Macro
61/F0 61
123
F12
07/F0 07
46
Z
1A/F0 1A
125
Scroll Lock
7E/F0 7E
*101-Key Keyboard Only
**102-Key Keyboard Only
Key Number
and Symbol
75
Insert
76
Delete
79
¬
80
Home
81
End
83
84
¯
85
PgUp
86
PgDn
89
®
Base Case
Shift+Num
Left-Shift
Right-Shift
Num Lock
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 F0 12 E0 70
/E0 F0 70 E0 12
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 12 E0 7A
/E0 F0 7A E0 12
E0 F0 12 E0 74
/E0 F0 74 E0 12
E0 F0 59 E0 70
/E0 F0 70 E0 59
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 F0 59 E0 7A
/E0 F0 7A E0 59
E0 F0 59 E0 74
/E0 F0 74 E0 59
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 F0 12
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 12 E0 7A
/E0 F0 7A E0 F0 12
E0 12 E0 74
/E0 F0 74 E0 F0 12
E0 1F
E0 F0 12 E0 1F
E0 F0 59 E0 1F
E0 12 E0 1F
/E0 F0 1F
/E0 F0 1F E0 12
/E0 F0 1F E0 59
/E0 F0 1F E0 F0 12
E0 27
E0 F0 12 E0 27
E0 F0 59 E0 27
E0 12 E0 27
/E0 F0 27
/E0 F0 27 E0 12
/E0 F0 27 E0 59
/E0 F0 27 E0 F0 12
L Win
R Win
E0 2F
E0 F0 12 E0 2F
E0 F0 59 E0 2F
E0 12 E0 2F
/E0 F0 2F
/E0 F0 2F E0 12
/E0 F0 2F E059
/E0 F0 2F E0 F0 12
APP
When both shift keys are held down:
key number 75
Key Number
and Symbol
95
Base
/
Key Number
and Symbol
Print Screen
Key Number
and Symbol
126
Pause
Left-Shift
Right-Shift
E0 4A/E0 F0 4A E0 F0 12 E0 4A/E0 F0 4A E0 12
When both shift keys are held down:
key number 95
124
Both Shift
E0 AA E0 B6 E0 52/E0 D2 E0 2A E0 36
E0 F0 59 E0 4A/E0 F0 4A E0 59
Both Shift
E0 F0 12 E0 F0 59 E0 4A/E0 F0 4A E0 12 E0 59
Base
Shift/Ctrl
Alt
E0 12 E0 7C/E0 F0 7C E0 F0 12
E0 7C/E0 F0 7C
84/F0 84
Base
Ctrl
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.
Rev. 1.60
10
April 16, 2004
HT82K628A
Key Number
and Function
Default
ACPI
Power
E0 37/E0 F0 37
Make/Break
ACPI
Sleep
E0 3F/E0 F0 3F
Make/Break
ACPI
Wake-up
E0 5E/E0 F0 5E
Make/Break
Make/Break code
Default
Key Number
and Function
Rev. 1.60
Make/Break code
56
Brazil BA0
51/F0 51
Typematic
131
Japanese J131
67/F0 67
Make
132
Japanese J132
64/F0 64
Make
133
Japanese J133
13/F0 13
Make
150
Korea KC-L
F1/-
Make
151
Korea KC-R
F2/-
Make
Multimedia Key Function
Make/Break code
E-Mail
E0 48/E0 F0 48
WWW Home
E0 3A/E0 F0 3A
WWW Favorites
E0 18/E0 F0 18
WWW Search
E0 10/E0 F0 10
WWW Refresh
E0 20/E0 F0 20
WWW Stop
E0 28/E0 F0 28
WWW Forward
E0 30/E0 F0 30
WWW Back
E0 38/E0 F0 38
Media
E0 50/E0 F0 50
Play/Pause
E0 34/E0 F0 34
Stop
E0 3B/E0 F0 3B
Prev Track
E0 15/E0 F0 15
Next Track
E0 4D/E0 F0 4D
Volume+
E0 32/E0 F0 32
Volume-
E0 21/E0 F0 21
Mute
E0 23/E0 F0 23
My Computer
E0 40/E0 F0 40
Calculator
E0 2B/E0 F0 2B
Screen save
E0 4B/E0 F0 4B
Rec
E0 1C/E0 F0 1C
Rew
E0 43/E0 F0 43
Minimize
E0 22/E0 F0 22
Eject
E0 1D/E0 F0 1D
11
April 16, 2004
HT82K628A
Key Code Set 3
Key
Number
Make
/Break Code
Default
Key State
Key
Number
Make
/Break Code
Default
Key State
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
44
**45
46
47
48
49
50
51
52
53
54
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
12/F0 12
13/F0 13
1A/F0 1A
22/F0 22
21/F0 21
2A/F0 2A
32/F0 32
31/F0 31
3A/F0 3A
41/F0 41
49/F0 49
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
Make/Break
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
Typematic
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
117
118
119
120
121
122
123
124
125
126
127
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
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
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
Make Only
Make Only
Make Only
Make Only
Make Only
Make Only
Make Only
Make Only
Make Only
Make Only
Typematic
*101-Key Keyboard Only
**102-Key Keyboard Only
Rev. 1.60
12
April 16, 2004
HT82K628A
Key Number
and Function
Make/Break code
Default
56
Brazil BA0
51/F0 51
Typematic
131
Japanese J131
67/F0 67
Make
132
Japanese J132
64/F0 64
Make
133
Japanese J133
13/F0 13
Make
150
Korea KC-L
F1/-
Make
151
Korea KC-R
F2/-
Make
Timing Diagrams
Data Output
(1 )
(3 )
(3 )
1 s t
C L K
C L K
2 n d
C L K
(3 )
(3 )
1 0 th
C L K
(4 )
1 1 th
C L K
(5 )
T 3
(2 )
T 1
D A T A
S ta r t B it
(7 )
T 5
T 4
T 2
B it 0
P a r ity B it
S to p B it
(6 )
T im in g P a r a m e te r
M in /M a x
T 1
D A T A tr a n s itio n to th e fa llin g e d g e o f C L K
5 /2 5 m s e c
T 2
R is in g e d g e o f C L K to D A T A tr a n s itio n
T 3
D u r a tio n o f C L K in a c tiv e
5 /T 4 -5 m s e c
3 0 /5 0 m s e c
T 4
D u r a tio n o f C L K a c tiv e
T 5
T im e to a u x ilia r y d e v ic e in h ib it a fte r c lo c k 1 1 to e n s u r e
th e a u x ilia r y d e v ic e d o e s n o t s ta r t a n o th e r tr a n s m is s io n
3 0 /5 0 m s e c
> 0 /5 0 m s e c
Keyboard Data Input
(1 )
(2 )
I/O
In h ib it
C L K
(4 )
2 n d
C L K
1 s t
C L K
T 7
9 th
C L K
1 0 th
C L K
(8 )
T 8
(6 )
T 9
D A T A
S ta r t B it
(3 )
Rev. 1.60
1 1 th
C L K
B it 0
P a r ity B it
(5 )
(5 )
S to p B it
(7 )
T im in g P a r a m e te r
M in /M a x
T 7
D u r a tio n o f C L K in a c tiv e
3 0 /5 0 m s e c
T 8
D u r a tio n o f C L K a c tiv e
3 0 /5 0 m s e c
T 9
T im e fr o m in a c tiv e to a c tiv e C L K tr a n s itio n , u s e d to tim e
w h e n th e a u x ilia r y d e v ic e s a m p le s D A T A
5 /2 5 m s e c
13
April 16, 2004
HT82K628A
· Fn key usage
Status
Key
Location
Fn
Num
Lock
Fn
Num
Lock
Fn
Num
Lock
Fn
Num
Lock
OFF
OFF
ON
OFF
OFF
ON
ON
ON
7
&7
Home
7
7
8
*8
8
8
9
(9
PgUp
9
9
0
)0
*
*
0
U
U
¬
4
U
I
I
5
I
O
O
®
6
O
P
P
-
-
P
J
J
End
1
J
K
K
¯
2
K
L
L
PgDn
3
L
:;
:;
+
+
:;
M
M
Ins
0
M
>.
>.
Del
.
>.
?/
?/
/
/
?/
Enter
Enter (L)
Enter(R)
Enter(R)
Enter(L)
F1/F11
F1
F11
F1
F11
F2/F12
F2
F12
F2
F12
F10/
ScrLock
F10
ScrLock
F10
ScrLock
/PgUp
Page Up
Page Up
¯/PgDn
¯
Page Down
¯
Page Down
¬/Home
¬
Home
¬
Home
®/End
®
End
®
End
Rev. 1.60
14
April 16, 2004
HT82K628A
Key Matrix
C0
R0
R1
R2
R3
R4
R5
R6
R7
R8
R9
PAUSE
126
C1
C2
C3
Pre Track
Stop
Play/Pause
Q
17
TAB
16
30
E
19
R
U
23
I
24
O
25
P
26
;(:)
40
Vol-
R11
|(\)
14
7(Home)
91
R14
106
Wake-up
R16
Screen
Save
.
107
SHIFT-L
44
SHIFT-R
57
WIN-L
KC-L
150
ENTER-R
108
105
83
WWW
Search
Rew
WIN-R
00
000
Min
Media
E-mail
WWW
Home
WWW
Back
WWW
Forward
WWW
Stop
R19
My
Computer
Calculator
/
Page Up
¯/
Page Down
¬/
Home
®/
END
15
PgUp
F10
121
POWER
SLEEP
PgDn
86
HOME
END
81
F1/F11
FN
Eject
F10/
Scroll
F2/F12
R18
Rev. 1.60
INS
80
79
Rec
DEL
85
¬
PRINT
SCREEN
F9
75
*
100
Mute
®
89
0(¢)¢)
11
76
/
.(Del)
104
¯
9(¢(¢)
10
_(-)
120
84
95
3(PgDn)
103
102
+
R15
R17
6(®)
NUM
LOCK
0(Ins)
F8
119
F12
123
90
99
ALT-R
8(*)
9
12
62
ENTER-L
SPACE
2(¯)
98
Vol+
43
61
5
9(PgUp)
101
F11
122
93
97
96
ALT-L
=(+)
/(?)
55
60
1(End)
4(¬)
92
42
\(|)
29
8()
R12
R13
BACK
15
APP
7(&)
8
13
|(\)
'(²)
41
SCROLL
LOCK
125
R10
.(>)
4($)
6(^)
\(-)
56
4
5
7
,(<)
3(#)
5(%)
6
N
54
[({)
113
51
2(@)
3
F2
B
M
L
F1
ROMA
50
1(!)
2
112
133
53
¢(~)
CHG
V
116
1
132
F6
39
27
X
C
58
N-CHG
131
52
117
F7
118
Z
H
K
38
64
49
36
](})
28
F5
G
J
37
CTRL-L
48
35
Y
22
Next
Track
F4
F
34
CTRL-R
47
115
T
21
C7
|(\)
D
33
C6
46
45
F3
114
20
S
32
C5
ESC
110
CAPS
LOCK
W
18
A
31
C4
WWW
Refresh
KC-R
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April 16, 2004
HT82K628A
Application Circuits
3 2
1 5
V D D
F .B .
1 0 m F
V D D
V S S
6
C 0
0 .1 m F
5
C 1
4
C 2
3
C 3
G N D
V
D D
L E D 2
V
3 0
L E D 1
1 7
D D
1 N 4 1 4 8
3 8
C 4
L E D 0
1 6
3 1
C A P
N U M
V
5 8 .3 k W
S C R
R 5
R E S E T
R 6
R
C L K
R
R
D A T A
R
R
R
2 0
2 1
R
O S C 1
F n S e le c t
7
R 3
D D
3 3
8
R 2
o p tio n
1 8
9
R 1
R 8
D A T A
1 0
R 0
R 7
1 9
3 5
C 7
0 .1 m F
C L O C K
3 6
C 6
R 4
4 7 k W
3 7
C 5
R
R
R
R 9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2
1
4 0
3 9
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
1 4
1 3
1 2
1 1
M a c r o K e y s e le c t
H T 8 2 K 6 2 8 A
Note:
Fn Select ® GND: Enable the Mini Keyboard
Macro Key Select ® GND: Disable the Macro Key
Rev. 1.60
16
April 16, 2004
HT82K628A
Package Information
40-pin DIP (600mil) Outline Dimensions
A
4 0
2 1
1
2 0
B
H
C
D
E
Symbol
Rev. 1.60
F
a
G
I
Dimensions in mil
Min.
Nom.
Max.
A
2045
¾
2065
B
535
¾
555
C
145
¾
155
D
125
¾
145
E
16
¾
20
F
50
¾
70
G
¾
100
¾
H
595
¾
615
I
635
¾
670
a
0°
¾
15°
17
April 16, 2004
HT82K628A
Holtek Semiconductor Inc. (Headquarters)
No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan
Tel: 886-3-563-1999
Fax: 886-3-563-1189
http://www.holtek.com.tw
Holtek Semiconductor Inc. (Taipei Sales Office)
4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan
Tel: 886-2-2655-7070
Fax: 886-2-2655-7373
Fax: 886-2-2655-7383 (International sales hotline)
Holtek Semiconductor Inc. (Shanghai Sales Office)
7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233
Tel: 021-6485-5560
Fax: 021-6485-0313
http://www.holtek.com.cn
Holtek Semiconductor Inc. (Shenzhen Sales Office)
43F, SEG Plaza, Shen Nan Zhong Road, Shenzhen, China 518031
Tel: 0755-8346-5589
Fax: 0755-8346-5590
ISDN: 0755-8346-5591
Holtek Semiconductor Inc. (Beijing Sales Office)
Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031
Tel: 010-6641-0030, 6641-7751, 6641-7752
Fax: 010-6641-0125
Holmate Semiconductor, Inc. (North America Sales Office)
46712 Fremont Blvd., Fremont, CA 94538
Tel: 510-252-9880
Fax: 510-252-9885
http://www.holmate.com
Copyright Ó 2004 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used
solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable
without further modification, nor recommends the use of its products for application that may present a risk to human life
due to malfunction or otherwise. Holtek¢s products are not authorized for use as critical components in life support devices
or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information,
please visit our web site at http://www.holtek.com.tw.
Rev. 1.60
18
April 16, 2004