Renesas H8S/2111B Hardware Manual page 321

Bit Bit Name
2 BC2
1 BC1
0 BC0
Initial
Value R/W
0 R/W
0 R/W
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.
2
I C Bus Format Clocked Synchronous Serial Mode
000: 9 bits
001: 2 bits
010: 3 bits
011: 4 bits
100: 5 bits
101: 6 bits
110: 7 bits
111: 8 bits
000: 8 bits
001: 1 bits
010: 2 bits
011: 3 bits
100: 4 bits
101: 5 bits
110: 6 bits
111: 7 bits
Rev. 1.00, 05/04, page 287 of 544