HCS500 Datasheet, PDF (21/24 Pages) Microchip Technology – KEELOQ CODE HOPPING ENCODER

HCS500
8.1.4 ACTIVATE LEARN COMMAND IN MICRO MODE
Symbol
TLRN
TACK
TRESP
TACK2
Parameters
Learn command activation time
Decoder acknowledge time
Microcontroller acknowledge
response time
Decoder data line low
Standard Operating Conditions (unless otherwise specified):
Commercial (C): 0°C ≤ TA ≤ +70 °C
Industrial (I):
-40°C ≤ TA ≤ +85°C
Min
Typ
Max
Units
20
—
1000
µs
—
—
20
µs
20
—
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
—
—
100
ms
—
2
s
—
6
s
8.1.6 LEARN STATUS STRING
Symbol
TDHI
TCLA
TCA
TCLH
TCLL
TCLKH
TCLKL
FCLK
TDS
Parameters
Command request time
Microcontroller command
request time
Decoder request
acknowledge time
Clock high hold time
Clock low hold time
Clock high time
Clock low time
Clock frequency
Data hold time
Standard Operating Conditions (unless otherwise specified):
Commercial (C): 0°C ≤ TA ≤ +70°C
Industrial (I):
-40°C ≤ TA ≤ +85°C
Min
Typ
Max
Units
—
—
0.005
—
500
ms
500
ms
—
—
10
µs
1.2
ms
0.020
—
1.2
ms
20
—
1000
µs
20
—
1000
µs
500
—
25000
Hz
—
—
5
µs
© 1997 Microchip Technology Inc.
Preliminary
DS40153B-page 21