Figure 12-29: Clocked Serial Interface Transmission Buffer Registers L0, L1 (Sotbl0, Sotbl1) - NEC V850E/CA1 ATOMIC Preliminary User's Manual

(8) Clocked serial interface transmission buffer registers L0, L1 (SOTBL0, SOTBL1)
The SOTBLn register is an 8-bit buffer register that stores transmit data (n = 0, 1).
When the transmission/reception mode is set (TRMD bit of CSIMn register = 1), the transmission
operation is started by writing data to the SOTBLn register.
These registers can be read/written in 8-bit units.
The SOTBLn register is the same as the lower bytes of the SOTBn register.

Figure 12-29: Clocked Serial Interface Transmission Buffer Registers L0, L1 (SOTBL0, SOTBL1)

7
SOTBL0 SOTB7 SOTB6
7
SOTBL1 SOTB7 SOTB6
Bit Position Bit Name
7 to 0 SOTB7 to
SOTB0
Cautions: 1. Access the SOTBLn register only when the 8-bit data length has been set (CCL bit
of CSIMn register = 0).
2. When the single transfer mode is set (AUTO bit of CSIMn register = 0), perform
access only in the idle state (CSOT bit of CSIMn register = 0). If the SOTBLn regis-
ter is accessed during data transfer, the data cannot be guaranteed.
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Chapter 12 Serial Interface Function
6 5 4
SOTB5 SOTB4
6 5 4
SOTB5 SOTB4
Function
Store transmit data.
Preliminary User's Manual U14913EE1V0UM00
3 2 1
SOTB3 SOTB2 SOTB1
3 2 1
SOTB3 SOTB2 SOTB1
0 Address
SOTB0 FFFFF904H
0 Address
SOTB0 FFFFF914H
Initial
value
00H
Initial
value
00H