TMPM330 - Keil

SBIxCR2
Under development
Serial bus control register 2
7 6 5 4 3 2 1 0
TMPM330 (rev 0.4) 10-8
TMPM330
bit Symbol MST TRX BB PIN SBIM1 SBIM0 SWRST1 SWRST0
Read/Write W W (Note 2) W (Note 1)
After reset 0 0 0 1 0 0 0 0
Function
Select Select
master/slave transmit/
0: Slave receive
1: Master
0: Receive
1: Transmit
Start/stop
condition
generation
0: Stop
condition
generated
1: Start
condition
generated
Clear
INTSBIn
interrupt
request
0: −
1: Clear
interrupt
request
Select serial bus interface
operating mode
(Note 2)
00: Port mode
01: SIO mode
10: I2C bus mode
11: (Reserved))
Software reset generation
Write “10” followed by “01”
to generate a reset.
15 14 13 12 11 10 9 8
bit Symbol
Read/Write R
After reset 0
Function This can be read as “0.”
23 22 21 20 19 18 17 16
bit Symbol
Read/Write R
After reset 0
Function This can be read as “0.”
31 30 29 28 27 26 25 24
bit Symbol
Read/Write R
After reset 0
Function This can be read as “0.”
: Write “10” followed by “01” to generate a reset.
: Select serial bus interface operating mode
: Clear INTSBIn interrupt request
: Start/stop condition generation
: Select transmit/ receive
: Select master/slave
Select serial bus interface operating mode (Note 2)
00 Port mode (disables serial bus interface output)
01 Clock –synchronous 8-bit SIO mode
10 I 2 C bus mode
11 (Reserved)
(Note 1) Reading this register causes it to function as the SBInSR register.
(Note 2) Ensure that the bus is free before switching the operating mode to the port mode.
Ensure that the port is at the “H” level before switching the operating mode from the
port mode to the I 2 C bus or clock-synchronous 8-bit SIO mode.
(Note 3) Ensure that serial transfer is completed before switching the mode.
Fig. 10-5 I 2 C Bus Mode register
Serial Bus Interface (SBI)