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7
Bit symbol
SBI0CR2
(0243H)
Read/Write
After Reset
Prohibit
Read-
modify-write
Function
Note: Set the SBI0CR1<BC2 to 0> "000" before switching to a clocked-synchronous 8-bit SIO
mode.
7
bit Symbol
SBI0SR
(0243H)
Read/Write
After reset
Function
Serial Bus Interface Control Register 2
6
5
4
Serial Bus Interface Status Register
6
5
4
Figure 3.10.21 Registers for the SIO Mode
91C815-172
3
2
1
SBIM1
SBIM0
W
0
0
Serial bus interface operation
mode selection
00: Port mode
01: SIO mode
2
10: I
C bus mode
11: (reserved)
Serial bus interface operation mode selection
00 Port Mode (serial bus interface output disabled)
01 Clocked-Synchronous 8-Bit SIO Mode
2
10 I
C Bus Mode
11 (reserved)
3
2
1
SIOF
SEF
R
0
0
Serial transfer
Shift operation
operation
status monitor
status monitor
Shift operation status monitor
0
Shift operation terminated
1
Shift operation in progress
Serial transfer operating status monitor
0
Transfer terminated
1
Transfer in progress
TMP91C815
0
0
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