Serial Bus Interface - Toshiba TMP91C824F Data Book

3.10 Serial Bus Interface (SBI)
The TMP91C824F has a 1-channel serial bus interface which employs a clocked-synchronous 8-bit SIO
2
mode and an I C bus mode.
The serial bus interface is connected to an external device through P71 (SDA) and P72 (SCL) in the I
mode; and through P70 (SCK), P71 (SO), P72 (SI) in the clocked-synchronous 8-bit SIO mode.
Each pin is specified as follows.
2
I C Bus Mode
Clocked Synchronous
8-Bit SIO Mode
X: Don't care
3.10.1 Configuration
SIO
Clock
Control
φT
Divider
2
I C bus
Clock Sysn.
+
Noise
Canceller Control
SBI0CR2/
SBI0SR
SBI Control Register 2/
SBI Status Register
P7ODE <ODE72, ODE71>
11
XX
INTSBI Interrupt request
Transfer
Control
Circuit
Register
I2C0AR SBI0DBR
2
I C bus SBI Data
Address Register Buffer Register
Figure 3.10.1 Serial Bus Interface (SBI)
91C824-151
P7CR <P72C, P71C, P70C>
11X
011
010
SIO
Data Control
2
Shift I C bus
Data Control
SBI0CR1
SBI Control
Register 1
TMP91C824
2
P7FC <P72F, P71F, P70F>
11X
X11
SCL
SCK
(SCK)
Input/
Output
Control
SO
(SO/SDA)
SI
(SI/SCL)
Nosie
SDA
Canceller
SBI0BR0, 1
SBI baud rate
Ragister 0, 1
C bus
P70
P71
P72