Renesas M16C/64A Series User Manual page 627

M16C/64A Group
26.2.7 CEC Transmit Buffer Register 1 (CCTB1)
CEC Transmit Buffer Register 1
b7
Rewrite the CCTB1 register when the CTXDEN bit in the CECC3 register is 0 (transmit disabled), or the
CTXDEN bit is 1 and the CTD8FLG in the CECFLG register is 1 (while bits EOM and ACK are being
transmitted after the eighth bit has been transmitted). Do not rewrite the CCTB1 register when the
CTXDEN bit is 1 and the CTD8FLG bit is 0 (while the first bit to eighth 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
CCTBE (Transmit data EOM bit) (b0)
Rewrite the CCTBE bit when the CTXDEN bit in the CECC3 register is 0 (transmit disabled), or the
CTXDEN bit is 1 and the CTD8FLG in the CECFLG register is 1 (while bits EOM and ACK are being
transmitted after the eighth bit has been transmitted). The information written to this bit is output after
the next data transmission. Do not rewrite the CCTBE bit when the CTXDEN bit is 1 and the CTD8FLG
bit is 0 (while the first bit to eighth bit are being transmitted).
CCTBA (Transmit data ACK input bit) (b1)
Read the CCTBA bit after transmitting the tenth bit (ACK bit) (the CTD8FLG bit in the CECFLG register
changes from 1 to 0).
R01UH0136EJ0210 Rev.2.10
Jul 31, 2012
b0
Symbol
CCTB1
Sets the transmit data
Symbol
CCTB2
Bit Symbol
CCTBE Transmit data EOM bit
CCTBA Transmit data ACK input bit
—
No register bits. If necessary, set to 0. Read as undefined value
(b7-b2)
26. Consumer Electronics Control (CEC) Function
Address
0356h
Function
Address
0357h
Bit Name
0: Data block continues
1: Data block ends
0: ACK input
1: NACK input
Reset Value
00h
RW
RW
Reset Value
XXXX XX00b
Function RW
RW
RW
—
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