TMP91C824
91C824-154
Serial Bus Interface Control Register 2
7 6 5 4 3 2 1 0
Bit symbol
MST
TRX
BB
PIN
SBIM1
SBIM0
SWRST1
SWRST0
Read/Write
W
W (Note 1)
W (Note 1)
After
Reset
0 0 0 1 0 0 0 0
Function
Master/Slave
selection
Transmitter/
Receiver
selection
Start/Stop
generation
Cancel
INTSBI
interrupt
request
Serial bus interface operating
mode selection (note 2)
00: Port Mode
01: SIO Mode
10: I
2
C Bus Mode
11: (reserved)
Software reset generate write
“10” and “01”, then an internal
reset signal is generated.
Serial bus interface operating mode selection (Note 2)
00 Port Mode (Serial Bus Interface output disabled)
01 Clocked Synchronous 8-Bit SIO Mode
10 I
2
C Bus Mode
11 (reserved)
INTSBI interrupt request
0
−
1
Cancel interrupt request
Start/Stop generation
0
Generates the stop condition
1
Generates the start condition
Transmitter/Receiver selection
0
Receiver
1
Transmitter
Master/Slave selection
0
Slave
1
Master
SBI0CR2
(0243H)
Note1: Reading this register function as SBI0SR register.
Note2: Switch a mode to port mode after confirming that the bus is free.
Switch a mode between I
2
C bus mode and clock-synchronous 8-bit SIO mode after
confirming that input signals via port are high-level.
Prohibit
Read-
modify-write
Figure 3.10.4
Registers for the I
2
C Bus Mode