CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U15195EJ5V0UD
489
(10) Clocked serial interface initial transmit buffer registers L0, L1 (SOTBFL0, SOTBFL1)
The SOTBFLn register is an 8-bit buffer register that stores initial transmission data in the repeat transfer
mode (n = 0, 1).
The transmission operation is not started even if data is written to the SOTBFLn register.
These registers can be read/written in 8-bit or 1-bit units.
The SOTBFLn register is the same as the lower bytes of the SOTBFn register.
Caution Access the SOTBFLn register only when the 8-bit data length has been set (CCL bit of
CSIMn register = 0), and only in the idle state (CSOTn bit of CSIMn register = 0). If the
SOTBFLn register is accessed during data transfer, the data cannot be guaranteed.
7
SOTBF7
SOTBFL0
6
SOTBF6
5
SOTBF5
4
SOTBF4
3
SOTBF3
2
SOTBF2
1
SOTBF1
0
SOTBF0
Address
FFFFF908H
After reset
00H
7
SOTBF7
SOTBFL1
6
SOTBF6
5
SOTBF5
4
SOTBF4
3
SOTBF3
2
SOTBF2
1
SOTBF1
0
SOTBF0
Address
FFFFF918H
After reset
00H
Bit position
Bit name
Function
7 to 0
SOTBF7 to
SOTBF0
Stores initial transmission data in repeat transfer mode.