
CHAPTER 16 CLOCKED SERIAL INTERFACE 0 (CSI0)
User
’
s Manual U15862EJ3V0UD
483
(9) Clocked serial interface initial transmission buffer register n (SOTBFn)
The SOTBFn register is a 16-bit buffer register that stores initial transmission data in the repeat transfer
mode.
The transmission operation is not started even if data is written to the SOTBFn register.
These registers can be read/written in 16-bit units.
Caution
Access the SOTBFn register only when the 16-bit data length has been set (CCLn bit of
CSIM0n register = 1), and only in the idle state (CSOTn bit of CSIM0n register = 0). If the
SOTBFn register is accessed during data transfer, the data cannot be guaranteed.
14
SOTBFn
14
13
SOTBFn
13
12
SOTBFn
12
2
SOTBFn
2
3
SOTBFn
3
4
SOTBFn
4
5
SOTBFn
5
6
SOTBFn
6
7
SOTBFn
7
8
SOTBFn
8
9
SOTBFn
9
10
SOTBFn
10
11
SOTBFn
11
15
SOTBFn
15
1
SOTBFn
1
0
SOTBFn
0
SOTBFn
After reset: 0000H R/W Address: FFFFFD08H, FFFFFD18H, FFFFFD28H
Remark
n = 0, 1 (V850ES/KF1, V850ES/KG1), n = 0 to 2 (V850ES/KJ1)
(10)
Clocked serial interface initial transmission buffer register nL (SOTBFnL)
The SOTBFnL register is an 8-bit buffer register that stores initial transmission data in the repeat transfer
mode.
The transmission operation is not started even if data is written to the SOTBFnL register.
These registers can be read/written in 8-bit or 1-bit units.
The SOTBFnL register is the same as the lower bytes of the SOTBFn register.
Caution
Access the SOTBFnL register only when the 8-bit data length has been set (CCLn bit of
CSIM0n register = 0), and only in the idle state (CSOTn bit of CSIM0n register = 0). If the
SOTBFnL register is accessed during data transfer, the data cannot be guaranteed.
7
SOTBFn7
SOTBFnL
6
SOTBFn6
5
SOTBFn5
4
SOTBFn4
3
SOTBFn3
2
SOTBFn2
1
SOTBFn1
0
SOTBFn0
After reset: 00H R/W Address: FFFFFD08H, FFFFFD18H, FFFFFD28H
Remark
n = 0, 1 (V850ES/KF1, V850ES/KG1), n = 0 to 2 (V850ES/KJ1)