Figure 13-29: Clocked Serial Interface Transmission Buffer Registers Low (Sotbl0 To Sotbl2) - NEC V850E/CA2 JUPITER Preliminary User's Manual

(8) Clocked serial interface transmission buffer registers Low (SOTBL0 to SOTBL2)
The SOTBLn register is an 8-bit buffer register that stores transmit data (n = 0 to 2).
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 13-29: Clocked Serial Interface Transmission Buffer Registers Low
7 6
SOTBL0 SOTB7 SOTB6
SOTBL1 SOTB7 SOTB6
SOTBL2 SOTB7 SOTB6
Bit Position Bit Name
SOTB7 to
7 to 0
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
register is accessed during data transfer, the data cannot be guaranteed.
Chapter 13 Serial Interface Function
(SOTBL0 to SOTBL2)
5 4
SOTB5 SOTB4 SOTB3
SOTB5 SOTB4 SOTB3
SOTB5 SOTB4 SOTB3
Store transmit data.
Preliminary User's Manual U15839EE1V0UM00
3 2 1
SOTB2 SOTB1
SOTB2 SOTB1
SOTB2 SOTB1
Function
0 Address
SOTB0 FFFF FD04H
SOTB0 FFFF FD44H
SOTB0 FFFF FD84H
Initial
value
00H
00H
00H
403