Holtek Semiconductor Inc HT6230 Datasheet
Infrared Remote Encoder
Features
Operating voltage: 2.4V~5.2V
·
32 system codes, each system with
·
64 command codes
Programmable transmission codes
·
Biphase transmission method
·
Generated modulation output data
·
Applications
Televisions and video cassette recorder
·
controllers
Garage door controllers
·
General Description
The HT6230 is designed as infrared remote en
coder, usually applied to TV systems. A total of
2048 different commands can be generated and
arranged into 32 systems where each system
contains 64 different commands. There are 96
HT6230
(1/2 system frequency and 1/4 duty cycle)
Single pin oscillator
·
429kHz resonator system clock
·
Test pins available
·
28-pin SOP package
·
Car door controllers
·
Security systems
·
Other remote control systems
·
keys and to each key is assigned one program
mable code. The code is programmable by mask
option. Legal and illegal key operation can be
distinguished.
-
Block Diagram
OSC
ZIN 3
ZIN 0
XIN7
XIN0
TT1
TT2
MS
RC
OSC
Test
M ode
Mode
S e le c tio n
Z-key
Encoder
X-key
Encoder
PAL
PAL
P a r a lle l
To Serial
C onverter
Output
Stage
M odulation
Output
Stage
Key Scan
Driver
D ecoder
VSS
CODE
MCODE
DRS7
DRS0
VDD
1
3´2
Z-key
PAL
X-key
PAL
13
2 D iv id e r
Reset
Action
Generator
Control
Unit
C om m and
And
S yste m
C ode Latch
Z-DRS
X-D RS
1 April 19, 2000
HT6230
Pin Assignment Pad Assignment
ZIN 0
ZIN 1
MS
28
1
XIN 7
MS
ZIN 0
ZIN 1
ZIN 2
ZIN 3
MCODE
CODE
DRS7
DRS6
DRS5
DRS4
DRS3
VSS
2
3
4
5
6
7
8
9
10
11
12
13
14
H T 6230
2 8 S O P
VDD
27
XIN 6
26
XIN 5
25
XIN 4
24
XIN 3
23
XIN 2
22
XIN 1
21
XIN 0
20
TT1
19
TT2
18
OSC
17
DRS0
16
DRS1
15
DRS2
ZIN 2
ZIN 3
MCODE
CODE
DRS7
DRS6
DRS5
1
27
28
2
3
4
5
6
7
8
9
DRS4
102411
DRS3
Chip size: 1605 ´ 1910 (mm)
* The IC substrate should be connected to VDD in the
layout artwork.
XIN 7
XIN 5
XIN 6
VDD
25
(0 ,0 )
122613
VSS
DRS2
XIN 4
XIN 3
21
22
23
XIN 2
20
XIN 1
19
XIN 0
18
TT1
17
TT2
16
15
14
DRS1
DRS0
OSC
2
Pad Coordinates
Pad No. X Y Pad No. X Y
1
2
3
4
5
6
7
8
9
10
11
-570.19
-662.85
-662.85
-662.85
-662.85 -147.93
-662.85 -395.02
-662.85 -536.45
-644.16 -817.68
-429.58 -817.68
-288.15 -817.68
-98.77 -817.68
12 107.68
13 249.11
14 463.69
817.68 15 605.12
442.16 16 653.07
300.74 17 653.07 65.84
120.29 18 653.07 207.26
19 653.07 437.29
20 653.07 578.71
21 561.23 817.68
22 419.80 817.68
23 278.37 817.68
24 136.94 817.68
-817.68
-817.68
-817.68
25
26
27
28
-4.48
-145.91
-287.34
-428.76
2 April 19, 2000
Unit: mm
-817.68
-75.59
817.68
817.68
817.68
817.68
Pad Description
HT6230
Pad No. Pad Name I/O
1~3
28
ZIN1~ZIN3
ZIN0
4 MCODE O
5 CODE O
6~10 DRS7~DRS3 O
11 VSS
¾¾
12~14 DRS2~DRS0 O
I
Internal
Connection
CMOS with
PMOS Pull-high
Tri-state
CMOS
Tri-state
CMOS
Open Drain
NMOS
Open Drain
NMOS
Detect inputs from Z-key matrix
Generate modulation output data code with
1/12 system frequency and 1/4 duty cycle
Generates output data code
Drive for key scanning
Negative power supply, ground
Drive for key scanning
15 OSC I CMOS Oscillator input
Switch to four operating modes:
0 0 normal mode
16~17 TT2~TT1 I CMOS
0 1 test mode 1
1 0 test mode 2
1 1 Reset
18~24 XIN0~XIN6 I
25 VDD
26 XIN7 I
¾¾
CMOS with
PMOS Pull-high
CMOS with
PMOS Pull-high
Detect inputs from X-key matrix
Positive power supply
Detect input from X-key matrix
Select system mode (Two modes provided:
27 MS I CMOS
One-key system mode and Two-key system
mode)
Description
Approximate internal connection circuits
·
Input terminal
P in : M S , T T 1 , T T 2 , O S C
V
DD
P in : X IN 0 ~ X IN 7 , Z IN 0 ~ Z IN 3
(w ith p u ll-h ig h re s is to r)
V
DD
V
DD
3 April 19, 2000
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