ht658 Linx Technologies, Inc., ht658 Datasheet - Page 5

• Manufacturer Part Number: ht658
• Description: Holtek Ht658/s Data Sheet
• Manufacturer: Linx Technologies, Inc.

Holtek HT658/S Data Sheet
E E N N C C O O D D E E R R / / D D E E C C O O D D E E R R T T I I M M I I N N G G
E E N N C C O O D D E E R R / / D D E E C C O O D D E E R R D D A A T T A A S S T T R R U U C C T T U U R R E E
Decoder VT
Data Out
Data Out
Transmit
Decoder
Encoder
Encoder
PULLED TO
PULLED TO
A&D BITS
A&D BITS
Enable
A&D Bits
PERIOD
15.1mS
22.30%
OPEN
SYNC
VCC
GND
SYNC BITS
SYNC BITS
5.6mS
8.27%
2 Words
Check
A0
3 Words
< 1 Word
TIME DEPENDANT ON OSCILLATOR RESISTOR CHOSEN (390k)
PERCENTAGES OF TOTAL TIME FOR ONE WORD PLUS SYNC
A1
A2
A3
1/2 Clock Time
ADDRESS BITS
Bit Pattern Interpretation
A4
fosc/33
"One"
"Zero"
"Open"
38.40%
26mS
2
A5
14
Clocks
Transmitted Continuously
A6
Check
A7
A8
A9
1/2 Clock Time
D0
D1
D2
3 Words
DATA BITS
D3
31.02%
21mS
D4
D5
2
D6
14
Clocks
Page 5
D7