Maxim Integrated MAXQ622 - Manual (Page 127)

MAXQ612/MAXQ622 User’s Guide
Maxim Integrated 8-3
Figure 8-1. IR Transmit Frequency Shifting Example (IRCFME = 0)
Figure 8-2. IR Transmit Carrier Generation and Carrier Modulator Control
IRCA IRCA = 0202h
IRMT = 3
IRCA = 0002h
IRCA, IRMT, IRDATA SAMPLED AT END OF
IRV DOWN-COUNT INTERVAL
IRMT = 5 IRMT
0 0 1
3 3 2 2 4 5 0 0 1 1
IRDATA
IR INTERRUPT
IRTX
IRTXPOL = 1
IRTX
IRTXPOL = 0
CARRIER OUTPUT
(IRV)
0
1
0
1
IRCAH + 1
IRTX PIN
IR INTERRUPT
IRTXPOL
IRCFME
SAMPLE
IRDATA ON
IRV = 0000h
IRCAL + 1
CARRIER GENERATION
CARRIER MODULATION
CARRIER
IRDATA
IRCLK
IRMT