NEC Renesas V850/SC1 User Manual page 353

(7) Clocked serial interface transmit buffer registers 5, 6 (SOTB5, SOTB6)
The SOTBn register is a 16-bit buffer register that stores transmit data.
When the transmit/receive mode is set (TRMDn bit of CSIMn register = 1), transmission is started by writing
data to the SOTBn register (n = 5, 6).
SOTBn is set by a 16-bit memory manipulation instruction.
RESET input sets these registers to 0000H.
After reset: 0000H R/W
15 14 13
SOTBn SOTB SOTB SOTB
n15 n14 n13
(n = 5, 6)
Cautions 1. Access the SOTBn register only when a data length of 16 bits is set (CCLn bit of CSIMn
register = 1).
2. When the single transfer mode is set (AUTOn bit of CSIMn register = 0), perform access
only in the idle state (CSOTn bit of CSIMn register = 0).
accessed during data transfer, the data cannot be guaranteed.
(8) Clocked serial interface transmit buffer registers L5, L6 (SOTBL5, SOTBL6)
The SOTBLn register is an 8-bit buffer register that stores transmit data.
When the transmit/receive mode is set (TRMDn bit of CSIMn register = 1), transmission is started by writing
data to the SOTBLn register (n = 5, 6).
SOTBLn is set by an 8-bit or 1-bit memory manipulation instruction.
RESET input sets these registers to 00H.
The SOTBLn register is the same as the lower bytes of the SOTBn register.
After reset: 00H R/W
7
SOTBLn SOTBn7 SOTBn6
(n = 5, 6)
Cautions 1. Access the SOTBLn register only when a data length of 8 bits has been set (CCLn bit of
CSIMn register = 0).
2. When the single transfer mode is set (AUTOn bit of CSIMn register = 0), perform access
only in the idle state (CSOTn bit of CSIMn register = 0). If the SOTBLn register is
accessed during data transfer, the data cannot be guaranteed.
CHAPTER 11 SERIAL INTERFACE FUNCTION
Address: FFFFF248H, FFFFF268H
12 11 10 9
SOTB SOTB SOTB SOTB SOTB
n12 n11 n10 n9
Address: FFFFF24AH, FFFFF26AH
6 5 4
SOTBn5 SOTBn4
User's Manual U15109EJ3V0UD
8 7 6 5 4
SOTB SOTB SOTB SOTB
n8 n7 n6 n5 n4
3 2
SOTBn3 SOTBn2
3 2 1 0
SOTB SOTB SOTB SOTB
n3 n2 n1 n0
If the SOTBn register is
1 0
SOTBn1 SOTBn0
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