M16C65 Datasheet, PDF (672/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
26. Consumer Electronics Control (CEC) Function
26.3.5 Reception
26.3.5.1 Start Bit Detection
The detect timing of the start bit and data bit is selected by the CRRNG bit in the CEC2 register.
Select the start bit acceptable range by the CSTRRNG bit in the CECC2 register. Figure 26.5 shows
Start Bit Acceptable Range.
When the start bit within the acceptable range is detected, the CRSTFLG bit in the CECFLG register
becomes 1 (start bit detected).
When the CRRNG bit is set to 0,
When the CRRNG bit is set to 1,
Acceptable range
When the CSTRRNG bit is set to 0: ±200µs
When the CSTRRNG bit is set to 1: ±300µs
Only a falling edge is detected
Both edges are detected
Acceptable range
±200µs
±300µs
CEC input
0 ms
3.7 ms
CRRNG, CSTRRNG: Bits in the CECC2 register
Figure 26.5 Start Bit Acceptable Range
4.5 ms
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
Page 637 of 791