Data Sheet

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, 48-pin SSOP packages
· 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
1
4 8
R 6
R 4
2
4 7
R 7
C 3
3
4 6
C 4
C 2
4
4 5
C 5
R 5
1
4 0
R 6
C 1
5
4 4
C 6
R 4
2
3 9
R 7
C 0
6
4 3
C 7
C 3
3
3 8
C 4
R 3
7
4 2
N C
C 2
4
3 7
C 5
R 2
8
4 1
N C
C 1
5
3 6
C 6
R 1
9
4 0
N C
C 0
6
3 5
C 7
R 0
1 0
3 9
N C
R 3
7
3 4
N C
N C
1 1
3 8
N C
R 2
8
3 3
O S C 1
N C
1 2
3 7
O S C 1
R 1
9
3 2
V D D
R 1 9
1 3
3 6
V D D
R 0
1 0
3 1
R E S E T
R 1 8
1 4
3 5
R E S E T
R 1 9
1 1
3 0
C A P S
R 1 7
1 5
3 4
C A P S
R 1 8
1 2
2 9
R 8
R 1 6
1 6
3 3
R 8
R 1 7
1 3
2 8
R 9
V S S
1 7
3 2
R 9
R 1 6
1 4
2 7
R 1 0
S C R O L L
1 8
3 1
R 1 0
V S S
1 5
2 6
R 1 1
N U M
1 9
3 0
R 1 1
S C R O L L
1 6
2 5
R 1 2
D A T A
2 0
2 9
R 1 2
N U M
1 7
2 4
R 1 3
C L O C K
2 1
2 8
R 1 3
F n S e le c t
D A T A
1 8
2 3
R 1 4
2 2
2 7
R 1 4
C L O C K
1 9
2 2
R 1 5
N C
2 3
2 6
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
N C
2 4
2 5
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. 1.70
R 5
H T 8 2 K 6 2 8 A
4 8 S S O P -A
1
June 11, 2008
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. 1.70
2
June 11, 2008
HT82K628A
Functional Description
The HT82K628A basic function is to detect key press and
release activity and to transmit the corresponding scan
code, as well as make and break codes to the system.
Command
The device also accepts commands from the system
and responds to the system if necessary. All communication between the keyboard and the system is managed through the CLOCK and DATA pins.
The keyboard begins to scan for pressed or released
keys and commands from the system after the BAT (Basic Assurance Test) has been run.
Basic Assurance Test - BAT
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
The following functions are offered by the Basic Assurance Test:
Default Disable
F5
· Turns on LED status indicators.
Set Default
F6
· Keyboard processor test.
Set All Keys - Typematic
F7
· RAM test.
Set All Keys - Make/Break
F8
Set All Keys - Make
F9
Set All Keys - Typematic/Make/Break
FA
· Turns off LED status indicators, i.e. the LEDs.
· Reports the BAT result to the system.
Note:
During the BAT, activity on the ²clock² and
²data² line are ignored. The LED¢s are turned
on at the beginning and turned off at the end of
the BAT. The BAT takes a minimum of 450ms
after POR and a maximum of 2.5s. The response to a satisfactory BAT completion is ²AA²
and response to BAT failure is an ²FC² error.
The reset keyboard command ²FF² will also
cause the keyboard to execute the BAT. Completion codes are sent between 300 and 500ms
after a reset command is acknowledged. After
the BAT, the keyboard sets the keys to
typematic and make/break, and sets the default
typematic rate and delay.
3 0 0 m s ~ 5 0 0 m s
FD
Resend
FE
Reset
FF
Bit
4 5 0 m s ~ 2 .5 s e c
B A T s ta rte d
Set Key Type - Make
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:
R e s e t
P o w e r o n s ta rt
FC
EDH - Set/Reset Status Indicators
Two important activities take place when power is first
applied to the keyboard. The first is the presence of an
H/W signal POR (Power-On-Reset) that resets the keyboard processor. The second activity is the running of
the self test BAT (Basic Assurance Test) routine.
1 5 0 m s ~ 2 s
FB
Set Key Type - Make/Break
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.
Power-on
P O R
Set Key Type - Typematic
B A T c o m p le te
Indicator
0
Scroll Lock Indicator
1
Num Lock Indicator
2
Caps Lock Indicator
3~7
Reserved (Must be 0)
Command from the Host
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.
The following table shows the commands that the host
may send and their hexadecimal values.
Rev. 1.70
3
June 11, 2008
HT82K628A
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%.
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 period (interval from one typematic output to the
next) is determined by the following equation:
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.
Period = (8+A)*(2^B)*0.00417 seconds.
Where:
A = binary value of bits 2, 1, and 0.
EEH - Echo
B = binary value of bits 4, and 3.
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.
The typematic rate is 1 for each period and are listed as
follows:
EFH and F1H - Invalid Command
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.
F0H - Select Alternate Scan Codes
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.
Bit
Typematic
Rate ± 20%
Bit
Typematic
Rate ± 20%
00000
30.0
10000
7.5
00001
26.7
10001
6.7
00010
24.0
10010
6.0
00011
21.8
10011
5.5
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
01010
12.0
11010
3.0
01011
10.9
11011
2.7
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.
01100
10.0
11100
2.5
01101
9.2
11101
2.3
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.
01110
8.0
11110
2.1
01111
8.0
11111
2.0
The default values for the HT82K628A are as follows:
Typematic rate= 10.9 characters per second ± 20%
F2H - Read ID
Delay = 500ms±20%
This command requests identification information from
The execution of this command stops without change to
the existing rate if another command is received instead
of the rate/delay value byte.
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.
F4H - Enable
Upon receipt of this command, the HT82K628A will respond with ACK, clears its output buffer, clears the last
typematic key, and starts scanning.
F3H - Set Typematic Rate/Delay
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
Rev. 1.70
4
June 11, 2008
HT82K628A
F5H - Default Disable
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).
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.
Commands to the Host
The following table shows the commands that the
HT82K628A may send to the host, and their hexadeci-
F6H - Set Default
mal values.
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.
Command
Hex Value
Key Detection Error/Overrun 00 (Code Set 2 and 3)
Keyboard ID
83AB
Bat Completion Code
AA
Bat Failure Core
FC
F7H, F8H, F9H, FAH - Set All Keys
Echo
EE
These commands instruct the HT82K628A to set all
keys to the type listed below:
Acknowledge
FA
Resend
FE
Hex Value
Command
F7
Set All Keys-Typematic
F8
Set All Keys-Make/Break
F9
Set All Keys-Make
FA
Set All Keys-Typematic/Make/Break
Key Detection Error/Overrun
00H or FFH - Key Detection Error
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.
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.
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.
FBH, FCH, FDH - Set Key Type
These commands instruct the HT82K628A to set individual keys to the type listed below:
Hex Value
FB
FF (Code Set 1)
Command
83AbH - Keyboard ID
Set Key Type-Typematic
FC
Set Key Type-Make/Break
FD
Set Key Type-Make
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.
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.
EEH - Echo
The HT82K628A sends this code in response to an
Echo command.
AAH - BAT Completion Code
Following satisfactory completion of the BAT, the
HT82K628A sends AAH. Any other code indicates keyboard failure.
FEH - Resend
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
Rev. 1.70
5
June 11, 2008
HT82K628A
· Data input
FCH - BAT Failure Code
If a BAT failure occurs, the HT82K628A sends this code,
discontinues scanning and waits for a host response or
reset.
FEH - Resend
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.
¨
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
¨
¨
Data Communications
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.
· Data output
¨
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.
¨
¨
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.
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.
If line contention occurs (system brings the clock
low before the tenth clock), set clock=data=high.
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
M
32/B2
7
^
6
07/87
53
<
,
33/B3
8
&
7
08/88
54
>
.
34/B4
Rev. 1.70
6
June 11, 2008
HT82K628A
Key Number
and Symbol
Key Number
and Symbol
Make/Break Code
Make/Break Code
9
*
8
09/89
55
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
+
=
0D/8D
61
Space
39/B9
14
?
/
35/B5
56 7D/D6 FD
62
Alt (R)
E0 38/E0 B8
15
Back Space
0E/8E
64
Ctrl (R)
E0 1D/E0 9D
16
Tab
0F/8F
90
Num Lock
45/C5
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
5
4C/CC
¯
50/D0
23
U
16/96
99
0
Ins
52/D2
24
I
17/97
100
25
O
18/98
101
9
PgUp
49/C9
26
P
19/99
102
6
®
4D/CD
*
37/B7
27
{
[
1A/9A
103
3
PgDn
51/D1
28
}
]
1B/9B
104
.
Del
53/D3
*29
½
\
2B/AB
105
-
4A/CA
30
Caps Lock
3A/BA
106
+
4E/CE
31
A
1E/9E
107
32
S
1F/9F
108
Enter
E0 1C/E0 9C
33
D
20/A0
110
ESC
01/81
34
F
21/A1
112
F1
3B/BB
35
G
22/A2
113
F2
3C/BC
36
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
Rev. 1.70
7
June 11, 2008
HT82K628A
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
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
Right-Shift
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
ACPI
Power
E0 5E/E0 DE
Make/Break
ACPI
Sleep
E0 5F/E0 DF
Make/Break
ACPI
Wake-up
E0 63/E0 E3
Make/Break
Make/Break code
Default
Key Number
and Function
56
Brazil BA0
73/F3
Typematic
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. 1.70
8
June 11, 2008
HT82K628A
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
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
<
,
41/F0 41
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
+
=
55/F0 55
61
Space
29/F0 29
6A/F0 6A
62
Alt (R)
E0 11/E0 F0 11
14
Rev. 1.70
9
June 11, 2008
HT82K628A
Key Number
and Symbol
Key Number
and Symbol
Make/Break Code
Make/Break Code
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
54/F0 54
103
3
PgDn
7A/ F0 7A
.
27
{
[
5
73/F0 73
*
7C/F0 7C
28
}
]
5B/F0 5B
104
*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
Del
71/F0 71
6D/F0 6D
4B/F0 4B
117
F6
0B F0 0B
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
43
Enter
5A/F0 5A
121
F10
09/F0 09
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
Rev. 1.70
10
June 11, 2008
HT82K628A
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
L Win
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
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
R Win
APP
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 4A/E0 F0 4A E0 F0 12 E0 4A/E0 F0 4A E0 12
When both shift keys are held down:
key number 95
Key Number
and Symbol
124
Print Screen
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
Key Number
and Symbol
126
Right-Shift
Pause
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.
Key Number
and Function
Rev. 1.70
Make/Break code
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
11
June 11, 2008
HT82K628A
Key Number
and Function
Rev. 1.70
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
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
12
June 11, 2008
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. 1.70
13
June 11, 2008
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. 1.70
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
14
June 11, 2008
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. 1.70
15
June 11, 2008
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
E
19
R
U
23
I
24
](})
28
F7
118
P
26
L
[({)
27
;(:)
40
R11
14
Vol-
7(Home)
91
R14
101
+
106
Wake-up
R16
Screen
Save
.
107
SHIFT-L
44
SHIFT-R
WIN-L
150
*
100
105
­
WWW
Search
WIN-R
00
000
WWW
Back
WWW
Forward
WWW
Stop
¯/
Page Down
¬/
Home
®/
END
Media
E-mail
R19
My
Computer
Calculator
­/
Page Up
16
DEL
INS
PgUp
Min
121
POWER
SLEEP
PgDn
86
HOME
80
79
Rew
R18
F10
85
¬
83
F9
75
Rec
WWW
Home
Rev. 1.70
104
ENTER-R
108
57
KC-L
.(Del)
PRINT
SCREEN
®
89
0(¢)¢)
Mute
76
/
95
3(PgDn)
103
102
R15
R17
6(®)
¯
10
11
120
84
9(¢(¢)
_(-)
F12
123
0(Ins)
99
ALT-R
NUM
LOCK
90
F8
12
62
8(*)
9
119
/(?)
ENTER-L
SPACE
2(¯)
98
Vol+
43
61
5
9(PgUp)
F11
122
93
97
96
ALT-L
1(End)
4(¬)
92
APP
55
60
\(|)
29
8(­)
R12
R13
BACK
15
42
=(+)
13
|(\)
'(²)
41
SCROLL
LOCK
|(\)
.(>)
7(&)
8
\(-)
54
4($)
6(^)
7
56
3(#)
4
5
N
,(<)
53
39
125
R10
F6
117
3
5(%)
6
51
2(@)
F2
113
B
M
52
K
38
O
25
H
36
F1
112
50
1(!)
2
ROMA
V
F5
116
¢(~)
CHG
133
49
J
37
C
C7
CTRL-L
58
1
132
G
35
Y
22
X
48
C6
N-CHG
131
F4
F
34
Z
47
115
T
21
Next
Track
|(\)
D
33
CTRL-R
64
46
45
F3
114
20
S
32
30
C5
ESC
110
CAPS
LOCK
W
18
A
31
C4
END
81
F1/F11
FN
Eject
F10/
Scroll
F2/F12
WWW
Refresh
KC-R
151
WWW
Bkmk
June 11, 2008
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
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
D D
L E D 0
1 6
3 1
V
5 8 .3 k W
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
S C R
R 8
D A T A
9
R 1
o p tio n
1 8
1 0
R 0
N U M
R 7
1 9
3 5
C 7
0 .1 m F
C L O C K
3 6
C 6
C A P
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. 1.70
17
June 11, 2008
HT82K628A
Package Information
40-pin DIP (600mil) Outline Dimensions
A
4 0
2 1
1
2 0
B
H
C
D
E
Symbol
Rev. 1.70
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
70
F
50
¾
G
¾
100
¾
H
595
¾
615
I
635
¾
670
a
0°
¾
15°
18
June 11, 2008
HT82K628A
48-pin SSOP (300mil) Outline Dimensions
4 8
2 5
A
B
2 4
1
C
C '
G
H
D
F
E
Symbol
Rev. 1.70
a
Dimensions in mil
Min.
Nom.
Max.
A
395
¾
420
B
291
¾
299
C
8
¾
12
C¢
613
¾
637
D
85
¾
99
E
¾
25
¾
F
4
¾
10
G
25
¾
35
H
4
¾
12
a
0°
¾
8°
19
June 11, 2008
HT82K628A
Product Tape and Reel Specifications
Reel Dimensions
D
T 2
A
C
B
T 1
SSOP 48W
Symbol
Description
Dimensions in mm
A
Reel Outer Diameter
330±1
B
Reel Inner Diameter
100±0.1
C
Spindle Hole Diameter
13+0.5
-0.2
D
Key Slit Width
2±0.5
T1
Space Between Flange
32.2+0.3
-0.2
T2
Reel Thickness
38.2±0.2
Rev. 1.70
20
June 11, 2008
HT82K628A
Carrier Tape Dimensions
P 0
D
P 1
t
E
F
W
D 1
C
B 0
K 1
P
K 2
A 0
SSOP 48W
Symbol
Description
Dimensions in mm
W
Carrier Tape Width
32±0.3
P
Cavity Pitch
16±0.1
E
Perforation Position
1.75±0.1
F
Cavity to Perforation (Width Direction)
14.2±0.1
D
Perforation Diameter
2 Min.
D1
Cavity Hole Diameter
1.5+0.25
P0
Perforation Pitch
4±0.1
P1
Cavity to Perforation (Length Direction)
2±0.1
A0
Cavity Length
12±0.1
B0
Cavity Width
16.2±0.1
K1
Cavity Depth
2.4±0.1
K2
Cavity Depth
3.2±0.1
t
Carrier Tape Thickness
C
Cover Tape Width
Rev. 1.70
0.35±0.05
25.5
21
June 11, 2008
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 (China) Inc. (Dongguan Sales Office)
Building No. 10, Xinzhu Court, (No. 1 Headquarters), 4 Cuizhu Road, Songshan Lake, Dongguan, China 523808
Tel: 86-769-2626-1300
Fax: 86-769-2626-1311
Holtek Semiconductor (USA), Inc. (North America Sales Office)
46729 Fremont Blvd., Fremont, CA 94538
Tel: 1-510-252-9880
Fax: 1-510-252-9885
http://www.holtek.com
Copyright Ó 2008 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. 1.70
22
June 11, 2008