HCS362_11 Datasheet, PDF (30/46 Pages) Microchip Technology – KEELOQ® Code Hopping Encoder Non-volatile synchronization data

HCS362
FIGURE 8-1: POWER-UP AND TRANSMIT TIMING
RFEN
LED
TRFON
TLED
1 TE
DATA
TTD
TDB
Code Word Code Word Code Word
1
2
3
TTP
TTO
Code Word from previous button press
Code Word
n
SN
Button Press
Detect
TABLE 8-3: POWER-UP AND TRANSMIT TIMING REQUIREMENTS⁽³⁾
VDD = +2.0 to 6.3V
Industrial (I): TAMB = -40 ° C to +85 ° C
Parameter
Symbol Min. Typical Max.
Unit
Transmit delay from button detect
TTD
26
30
40
ms
Debounce delay
TDB
18
20
22
ms
Auto-shutoff time-out period (TIMO=10)
TTO
23.4
25.6
28.16
s
RFEN after key press
TRFON
22
26
36
ms
LED on after key press
TLED
25
—
45
ms
Time to terminate code word from previous TTP
—
button press
—
10 ms
—
Note 1: Transmit delay maximum value if the previous transmission was successfully transmitted.
2: The Auto-shutoff time-out period is not tested.
3: These values are characterized but not tested
Remarks
(Note 1)
—
(Note 2)
—
—
—
DS40189E-page 30
© 2011 Microchip Technology Inc.