Datasheet

Enhanced Serial Communications Interface (ESCI) Module
MC68HC908GR16A Data Sheet, Rev. 1.0
172 Freescale Semiconductor
Figure 14-21. Bit Time Measurement with ACLK = 0
Figure 14-22. Bit Time Measurement with ACLK = 1, Scenario A
Figure 14-23. Bit Time Measurement with ACLK = 1, Scenario B
CPU WRITES SCIACTL
COUNTER STARTS,
COUNTER STOPS,
MEASURED TIME
CPU READS RESULT
RXD
WITH $20
ARUN = 1
AFIN = 1
OUT OF SCIADAT
CPU WRITES SCIACTL WITH $30
COUNTER STARTS, ARUN = 1
COUNTER STOPS, AFIN = 1
MEASURED TIME
CPU READS RESULT OUT
RXD
OF SCIADAT
CPU WRITES SCIACTL
COUNTER STARTS,
COUNTER STOPS,
MEASURED TIME
CPU READS RESULT
RXD
OUT OF SCIADAT
AFIN = 1
ARUN = 1
WITH $30