HCS500-I Datasheet, PDF (24/34 Pages) Microchip Technology – KEELOQ Code Hopping Decoder

HCS500
8.1.7 ERASE ALL COMMAND
Standard Operating Conditions (unless otherwise specified):
Commercial (C): 0°C ≤ TA ≤ +70°C
Industrial (I):
-40°C ≤ TA ≤ +85°C
Symbol
Parameters
Min
Typ
Max
Units
TERA Learn command activation time
20
TACK Decoder acknowledge time
20
TRESP
Microcontroller acknowledge
response time
20
TACK2 Decoder data line low
—
* These parameters are characterized but not tested.
—
1000
µs
—
210
ms
—
1000
µs
—
10
µs
8.1.8 PROGRAMMING COMMAND
Standard Operating Conditions (unless otherwise specified):
Commercial (C): 0°C ≤ TA ≤ +70°C
Industrial (I):
-40°C ≤ TA ≤ +85°C
Symbol
Parameters
Min
Typ
Max
Units
TPP1 Command request time
—
TPP2 Decoder acknowledge time
—
TPP3
Start Command mode to first
command bit
20
TPP4 Data line low before tri-stated
—
TCLKH Clock high time
20
TCLKL Clock low time
20
FCLK Clock frequency
500
TDS Data hold time
—
TCMD Command validate time
—
TACK Command acknowledge time
30
TWT2 Acknowledge respond time
20
TALW Data low after clock low
—
* These parameters are characterized but not tested.
—
500
ms
—
1
ms
—
1000
µs
—
5
µs
—
1000
µs
—
1000
µs
—
25000
Hz
—
5
µs
—
10
µs
—
240
ms
—
1000
µs
—
10
µs
DS40153C-page 24
© 2002 Microchip Technology Inc.