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PDF HT6P20 Data sheet ( Hoja de datos )
| Número de pieza | HT6P20 | |
| Descripción | 224 OTP Encoder | |
| Fabricantes | Holtek Semiconductor Inc | |
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HT6P20
224 OTP Encoder
Features
· Operating voltage: 2V~12V
· Low power consumption
· Built-in oscillator needs only 5% resistor
· 0/2/4/8 data selectable
· 224 maximum address and data codes
· Easy interface with an RF or IR medium
Applications
· Burglar alarm system
· Smoke and fire alarm system
· Garage door controllers
· Car door controllers
General Description
The HT6P20 is a CMOS LSI encoder designed
for remote control system applications. It en-
codes 24 bits of information and then serially
transmits it via the DOUT pin upon receipt of
transmission enable (DATA pins: D0~D7) sig-
nals. The combination of address and data bits
of the HT6P20 is designed using one time pro-
Block Diagram
· One time programmable process
· Data active: D0~D7
· Minimal external components
· HT6P20/A/B: 8-pin DIP/NSOP package
HT6P20/D: 16-pin DIP/NSOP package
· Security system
· Cordless telephones
· Other remote control systems
grammable process. In addition, the chip offers
various packaging for flexible combination of
programmable address/data so as to meet vari-
ous applications. Its programmable ad-
dress/data is transmitted together with the
anti-code bits via RF or infrared transmission
medium upon receipt of a trigger signal.
O SC1
O SC2
VPP
S IO
O s c illa to r
P r o g r a m m in g
C ir c u it
C o n tr o l U n it
A d d re s s
C o u n te r
M ix e r &
D r iv e r
D a ta L a tc h
DOUT
PG M D0 D7
Note: Address/Data numbers are available in various combinations, refer to the functional descrip
tion.
1 May 2, 2000
1 page  
Functional Description
Programming
The HT6P20 is a one time programmable encod-
ing integrated circuit. The programmable codes
consist of 4-bit control codes and 24-bit address
codes. Before using the device, first program the
internal 4 control bits and 24 address bits. Then,
to program the address and control codes, con-
nect the PGM pin to VSS, allowing the SIO pin to
receive control and address codes from the con-
tinuously transmitting programming kit. The
control codes (B0~B3) and address timing are re-
spectively shown on the Table and the Figure for
Programming Timing. In the programming pro-
cess, the mode bit (B0) has to be programmed
first. The 0/2/4/8 data number is selected by the
address along with the data format bits (B1,B2).
The HT6P20, in addition, provides a polarity bit
(B3) to select the polarity of the output data.
Various packages of the HT6P20 offer program-
mable combinations of address/data to meet
various application needs.
B0 B1 B2 B3
P o la r ity c o n tr o l
A d d re s s a n d d a ta fo rm a t
M o d e c o n tro l
HT6P20
Table 1: Control code
· Mode control (B0)
B0 Function
0 Not programmed
1 Programmed
· Address and data format (B1,B2)
B2 B1
Code Format
0 0 A0~A23
0 1 A0~A21 + D1~D0
1 0 A0~A19 + D3~D0
1 1 A0~A15 + D7~D0
· Polarity control (B3)
B3 Data Output Polarity
0 Negative polarity
1 Positive polarity
The HT6P20A/D can be programmed by the
SIO pins. The HT6P20B, on the other hand, is
programmed for 2-data and positive polarity
application.
Programming timing of the HT6P20D (B0~B3=1010)
O SC2
(3 k H z )
PG M
S IO
1 10 100100
1 0XXX X
P r o g r a m m in g
b it
C B0 B1 B2 B3 A0 A1 A2 A3
A 18 A 19 A 20 A 21 A 22 A 23
P r o g r a m m in g
N o te : (1 ) B 0 ~ B 3 a re c o n tro l c o d e s
(2 ) A 0 ~ A 2 3 a re a d d re s s c o d e s
( 3 ) A 2 0 ~ A 2 3 s ta n d s fo r d o n 't c a r e fo r th e H T 6 P 2 0 D
( 4 ) S IO m u s t b e s e t to " H ig h " d u r in g C a n d B 0 p e r io d s
( 5 ) 0 : " L o w " ; 1 : " H ig h " ; X : D o n 't c a r e
Programming timing for the HT6P20D
5 May 2, 2000
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet HT6P20.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HT6P20 | 224 OTP Encoder | Holtek Semiconductor Inc |
| HT6P20A | OTP Encoder | Holtek Semiconductor Inc |
| HT6P20B | OTP Encoder | Holtek Semiconductor Inc |
| HT6P20B2 | Remote Control Encoder |  Holtek Semiconductor |
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