HCS500_15 Datasheet, PDF (27/42 Pages) Microchip Technology – KEELOQ® Code Hopping Decoder

9.2 AC Electrical Characteristics
9.2.1 COMMAND MODE ACTIVATION
TABLE 9-3: COMMAND MODE ACTIVATION SPECIFICATIONS
Section 9.1 “Standard Operating Conditions”
Symbol
Parameters
Min.
Typ.
TREQ
Command request time
0.0150
—
TRESP
Microcontroller request
acknowledge time
—
—
TACK
Decoder acknowledge time
—
—
TSTART
Start Command mode to first
command bit
20
—
TCLKH
Clock high time
20
—
TCLKL
Clock low time
20
—
FCLK
Clock frequency
500
—
TDS
Data hold time
14
—
TCMD
Command validate time
—
—
TADDR
Address validate time
—
—
TDATA
Data validate time
—
—
* These parameters are characterized but not tested.
9.2.2 READ FROM USER EEPROM COMMAND
TABLE 9-4: READ FROM EEPROM COMMAND
Section 9.1 “Standard Operating Conditions”
Symbol
Parameters
Min.
Typ.
TRD
Decoder EEPROM read time
400
—
* These parameters are characterized but not tested.
HCS500
Max.
500
1
30
1000
1000
1000
25000
—
10
10
10
Units
ms
ms
s
s
s
s
Hz
s
s
s
s
Max.
1500
Units
s
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DS40000153E-page 27