CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U15195EJ5V0UD
486
(7) Clocked serial interface transmit buffer registers 0, 1 (SOTB0, SOTB1)
The SOTBn register is a 16-bit buffer register that stores transmit data (n = 0, 1).
When the transmission/reception mode is set (TRMDn bit of CSIMn register = 1), the transmission operation
is started by writing data to the SOTBn register.
This register can be read/written in 16-bit units.
Cautions 1. Access the SOTBn register only when the 16-bit data length is set (CCL bit of CSIMn
register = 1).
2. When the single transfer mode is set (AUTO bit of CSIMn register = 0), perform access
only in the idle state (CSOTn bit of CSIMn register = 0). If the SOTBn register is
accessed during data transfer, the data cannot be guaranteed.
14
SOTB
14
13
SOTB
13
12
SOTB
12
2
SOTB
2
3
SOTB
3
4
SOTB
4
5
SOTB
5
6
SOTB
6
7
SOTB
7
8
SOTB
8
9
SOTB
9
10
SOTB
10
11
SOTB
11
15
SOTB
15
1
SOTB
1
0
SOTB
0
SOTB0
Address
FFFFF904H
After reset
0000H
14
SOTB
14
13
SOTB
13
12
SOTB
12
2
SOTB
2
3
SOTB
3
4
SOTB
4
5
SOTB
5
6
SOTB
6
7
SOTB
7
8
SOTB
8
9
SOTB
9
10
SOTB
10
11
SOTB
11
15
SOTB
15
1
SOTB
1
0
SOTB
0
SOTB1
Address
FFFFF914H
After reset
0000H
Bit position
Bit name
Function
15 to 0
SOTB15 to
SOTB0
Stores transmit data.
Содержание PD703114
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