HCS512 Datasheet, PDF (16/20 Pages) Microchip Technology – KEELOQ CODE HOPPING DECODER

FIGURE 9-2: OUTPUT ACTIVATION
1 Code Word 50ms
RFIN
S[3,2,1,0]
VLOW
LRNOUT
TOD
TA
TA
Note 2
Note 1
0s
1s
2s
3s
4s
5s
Note 1: Output is activated as long as code is received.
2: Output is activated if battery low (VLOW) is detected.