Section 17 I2C Bus Interface 2 (IIC2)
Initial
Bit
2
Bit Name Value
R/W
R/W
R/W
R/W
Description
BC2
BC1
BC0
0
0
0
Bit Counter 2 to 0
1
These bits specify the number of bits to be transferred
next. When read, the remaining number of transfer bits is
indicated. With the I2C bus format, the data is transferred
with one addition acknowledge bit. Bit BC2 to BC0
settings should be made during an interval between
transfer frames. If bits BC2 to BC0 are set to a value
other than 000, the setting should be made while the SCL
pin is low. The value returns to 000 at the end of a data
transfer, including the acknowledge bit. With the clock
synchronous serial format, these bits should not be
modified.
0
I2C Bus Format
000: 9 bits
001: 2 bits
010: 3 bits
011: 4 bits
100: 5 bits
101: 6 bits
110: 7 bits
111: 8 bits
Clock Synchronous Serial Format
000: 8 bits
001: 1 bits
010: 2 bits
011: 3 bits
100: 4 bits
101: 5 bits
110: 6 bits
111: 7 bits
17.3.4
I2C Bus Interrupt Enable Register (ICIER)
ICIER enables or disables interrupt sources and acknowledge bits, sets acknowledge bits to be
transferred, and confirms acknowledge bits to be received.
Initial
Bit
Bit Name Value
R/W
Description
7
TIE
0
R/W
Transmit Interrupt Enable
When the TDRE bit in ICSR is set to 1, this bit enables or
disables the transmit data empty interrupt (TXI).
0: Transmit data empty interrupt request (TXI) is disabled.
1: Transmit data empty interrupt request (TXI) is enabled.
Rev. 3.00 Sep. 10, 2007 Page 338 of 528
REJ09B0216-0300
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