HCS500-I Datasheet, PDF (23/34 Pages) Microchip Technology – KEELOQ Code Hopping Decoder

HCS500
8.1.4 ACTIVATE LEARN COMMAND IN MICRO MODE
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
TLRN Learn command activation time
20
TACK Decoder acknowledge time
—
TRESP
Microcontroller acknowledge
response time
20
TACK2 Decoder data line low
—
* These parameters are characterized but not tested.
—
1000
µs
—
20
µs
—
1000
µs
—
10
µs
8.1.5 ACTIVATE LEARN COMMAND IN STAND-ALONE MODE
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 Learn command activation time
—
TPP3 Erase-all command activation time
—
* These parameters are characterized but not tested.
—
100
ms
—
2
s
—
6
s
8.1.6 LEARN STATUS STRING
Standard Operating Conditions (unless otherwise specified):
Commercial (C): 0°C ≤ TA ≤ +70°C
Industrial (I):
-40°C ð TA ≤ +85°C
Symbol
Parameters
Min
Typ
Max
Units
TDHI Command request time
—
—
500
ms
TCLA
Microcontroller command
request time
0.005
—
500
ms
TCA
Decoder request
acknowledge time
—
—
10
µs
TCLH Clock high hold time
1.2
ms
TCLL Clock low hold time
0.020
—
1.2
ms
TCLKH Clock high time
20
—
1000
µs
TCLKL Clock low time
20
—
1000
µs
FCLK Clock frequency
500
—
25000
Hz
TDS Data hold time
—
—
5
µs
* These parameters are characterized but not tested.
© 2002 Microchip Technology Inc.
DS40153C-page 23