M16C65 Datasheet, PDF (666/829 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
26.2.7 CEC Transmit Buffer Register 1 (CCTB1)
CEC Transmit Buffer Register 1
b7
b0
Symbol
CCTB1
Sets the transmit data
Address
0356h
Function
After Reset
00h
RW
RW
Rewrite the CCTB1 register when the CTXDEN bit in the CECC3 register is set to 0 (transmit disabled),
or the CTXDEN bit is set to 1 and the CTD8FLG in the CECFLG register is set to 1 (while bits EOM and
ACK are being transmitted after the 8th bit has been transmitted). Do not rewrite the CCTB1 register
when the CTXDEN bit is set to 1 and the CTD8FLG bit is set to 0 (while the 1st bit to 8th bit are being
transmitted).
26.2.8 CEC Transmit Buffer Register 2 (CCTB2)
CEC Transmit Buffer Register 2
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
CCTB2
Address
0357h
After Reset
XXXX XX00b
Bit Symbol
Bit Name
Function
RW
CCTBE Transmit data EOM bit
0: Data block continues
1: Data block ends
RW
CCTBA
Transmit data ACK input bit
0: ACK input
1: NACK input
RW
—
(b7-b2)
No register bits. If necessary, set to 0. Read as undefined value
—
CCTBE (Transmit Data EOM Bit) (b0)
Rewrite the CCTBE bit when the CTXDEN bit in the CECC3 register is set to 0 (transmit disabled), or
the CTXDEN bit is set to 1 and the CTD8FLG in the CECFLG register is set to 1 (while bits EOM and
ACK are being transmitted after the 8th bit has been transmitted). Do not rewrite the CCTBE bit when
the CTXDEN bit is set to 1 and the CTD8FLG bit is set to 0 (while the 1st bit to 8th bit are being
transmitted).
CCTBA (Transmit Data ACK Input Bit) (bs1)
Read the CCTBA bit after transmitting the 10th bit (ACK bit) (the CTD8FLG bit in the CECFLG register
changes from 1 to 0).
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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