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PDF HT82K629A Data sheet ( Hoja de datos )
| Número de pieza | HT82K629A | |
| Descripción | Windows 2000 USB+PS/2 Keyboard Encoder | |
| Fabricantes | Holtek Semiconductor Inc | |
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HT82K629A
Windows 2000 USB+PS/2 Keyboard Encoder
Features
· Operating voltage: 4.4V~5.5V
· Operating frequency: fSYS=6M
· Design for Windows 95/98/NT/2000/XP
· Phantom key detection
· Low voltage reset function
· USB and PS2 modes supported
· Auto detect USB or PS2 interface
· USB 1.1 low speed function
· Supports PS2 code set 1 and code set 2
· Supports multimedia key
· Supports ACPI key
· Supports mini-keyboard with Fn key
· Built-in Watchdog Timer
· HALT function and wake-up feature for USB mode to
reduce power consumption
· 40-pin DIP package
General Description
The HT82K629A can function both in USB and PS2 in-
terface environment. For PS2 interface, it supports IBM
PC/AT, IBM PS/2 and all compatible machines and pro-
vides a 16-character first-in-first-out buffer in which data
Block Diagram
is stored. For USB interface, it can support the USB
standard request as well as HID class request version
1.1.
U S B D + /P S 2 C L K
U S B D -/P S 2 D A T A
V 33O
O SC1
O SC2
VDD
VSS
USB
T r a n s c e iv e r
USB
R e c e iv e r
USB
T r a n s m itte r
V o lta g e
R e g u la to r
C lo c k
G e n e ra to r
R C R eset
R e g is te r S e t
U S B S e r ia l
In te r fa c e E n g in e ( S IE )
& C o n tr o l L o g ic
H o lte k 8 - b it
M ic r o c o n tr o lle r
M a in
S ta te M a c h in e
S uspend
C o n tro l
F IF O s
Rev. 1.30
1 April 16, 2004
1 page  
F3H - Set Typematic Rate/Delay
The host issues the Set Typematic Rate/Delay com-
mand to change the typematic rate and delay. The
HT82K629A responds to the command with ACK, stops
scanning and waits for the system to issue the rate/de-
lay value byte. The HT82K629A responds to the value
byte with another ACK, sets the rate and delay to the
value indicated, and continues scanning (if it was previ-
ously enabled). Bits 6 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, mul-
tiplied by 250ms±20%.
The period (interval from one typematic output to the
next) is determined by the following equation:
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:
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
01100 10.0 11100 2.5
01101 9.2 11101 2.3
01110 8.0 11110 2.1
01111 8.0 11111 2.0
The default values for the HT82K629A are as follows:
Typematic rate= 10.9 characters per second ± 20%
Delay = 500ms±20%
The execution of this command stops without changes
to the existing rate if another command is received in-
stead of the rate/delay value byte.
HT82K629A
F4H - Enable
Upon receipt of this command, the HT82K629A will re-
spond 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 HT82K629A will
respond with ACK, clears its output buffer, sets the de-
fault typematic rate/delay, and clears the last typematic
key. The HT82K629A then stops scanning and awaits
further command.
F6H - Set Default
The Set Default command resets all conditions to the
power on default states. The HT82K629A will respond
with ACK, clears its output buffer, sets the default key
typematic rate/delay, and clears the last typematic key
then continues scanning.
F7H, F8H, F9H, FAH - Set All Keys
Since HT82K629A do not support keyboard code set 3
format, so it will not acknowledge the command but re-
turns a Resend command and continues in its previous
scanning state.
FBH, FCH, FDH - Set Key Type
Since HT82K629A do not support keyboard code set 3
format, so it will not acknowledge the command but re-
turns a Resend command and continues in its previous
scanning state.
FEH - Resend
The host sends this command when it detects an error in
any transmission from the HT82K629A. It is sent only af-
ter a data transmission and before the host allows the
next data output. When a Resend is received, the
HT82K629A sends the previous output again (unless
the previous output was Resent, in which case the
HT82K629A sends the last byte before the Resend
command).
Rev. 1.30
5 April 16, 2004
5 Page 
HT82K629A
Key Number
and Symbol
42 Keycode42 (*5BJ)
43 Enter_L
44 Shift (L)
45 Keycode45 (*5B)
46 Z
Make/Break Code
5D/F0 5D
5A/F0 5A
12/F0 12
61/F0 61
1A/F0 1A
Key Number
and Symbol
120 F9
121 F10
122 F11
123 F12
125 Scroll Lock
Key Number
and Symbol
Base Case
Shift+Num
75 Insert
76 Delete
79 ¬
80 Home
81 End
83
84 ¯
85 PgUp
86 PgDn
89 ®
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
When both Shift keys are held down:
key number 75
Left-Shift
Right-Shift
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
Both Shift
E0 AA E0 B6 E0 52/E0 D2 E0 2A E0 36
Make/Break Code
01/F0 01
09/F0 09
78/F0 78
07/F0 07
7E/F0 7E
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 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
Key Number
and Symbol
Base
Left-Shift
Right-Shift
95 / E0 4A/E0 F0 4A E0 F0 12 E0 4A/E0 F0 4A E0 12 E0 F0 59 E0 4A/E0 F0 4A E0 59
When both Shift keys are held down:
key number 95
Both Shift
E0 F0 12 E0 F0 59 E0 4A/E0 F0 4A E0 12 E0 59
Key Number
and Symbol
Base
124 Print Screen E0 12 E0 7C/E0 F0 7C E0 F0 12
Shift/Ctrl
E0 7C/E0 F0 7C
Key Number
and Symbol
Base
126 Pause
E1 14 77 E1 F0 14 F0 77
This key is not typematic, all associated scan codes occur on the make code.
Alt
84/F0 84
Ctrl
E0 7E E0 F0 7E
56 (*BJ)
131 (*J)
132 (*J)
133 (*J)
150
151
Key Number
and Function
Brazil BA0
Japanese J131
Japanese J132
Japanese J133
Korea KC-L
Korea KC-R
Make/Break code
51/F0 51
67/F0 67
64/F0 64
13/F0 13
F1/-
F2/-
Default
Make/Break/Typematic
Make/Break/Typematic
Make/Break/Typematic
Make/Break/Typematic
Make
Make
Rev. 1.30
11 April 16, 2004
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet HT82K629A.PDF ] | |
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