HD64F2145 Datasheet, PDF (442/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Bit Bit Name Initial Value R/W
2 BC2
0
R/W
1 BC1
0
R/W
0 BC0
0
R/W
Description
Bit Counter 2 to 0
These bits specify the number of bits to be transferred next.
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 line is low.
The bit counter is initialized to 000 when a start condition is
detected. The value returns to 000 at the end of a data
transfer.
I²C Bus Format
Clocked Synchronous Serial Mode
000: 9 bits
000: 8 bits
001: 2 bits
001: 1 bits
010: 3 bits
010: 2 bits
011: 4 bits
011: 3 bits
100: 5 bits
100: 4 bits
101: 6 bits
101: 5 bits
110: 7 bits
110: 6 bits
111: 8 bits
111: 7 bits
Rev. 2.0, 08/02, page 402 of 788