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Chapter 13
3-Wire Serial Interface (CSIB)
User’s Manual U16702EE3V2UD00
(3)
CSIBn control register 2 (CBnCTL2)
This is an 8-bit register that controls the number of serial transfer bits of CSIB.
It can be read or written in 8-bit units.
Reset input clears this register to 00H.
Caution:
The CBnCTL2 register can be rewritten when the CBnPWR bit of the CBnCTL0 regis-
ter = 0 or when the CB0TXE and CB0RXE bits = 0.
Figure 13-4:
CSIBn Control Register 2 (CBnCTL2) Format
Remark:
n = 0, 1
Caution:
If the number of transfer bits is not 8 or 16, prepare data, justifying it to the least sig-
nificant bit of the CBnTX or CBnRX register.
Address: CB0CTL2: FFFFFD02H, CB1CTL2: FFFFFD12H
Symbol
7
6
5
4
3
2
1
0
R/W After Reset
CBnCTL2
0
0
0
0
CBnCL3
CBnCL2
CBnCL1
CBnCL0
R/W
00H
CBnCL3
CBnCL2
CBnCL1
CBnCL0
Bit length of serial register
0
0
0
0
8 bits
0
0
0
1
9 bits
0
0
1
0
10 bits
0
0
1
1
11 bits
0
1
0
0
12 bits
0
1
0
1
13 bits
0
1
1
0
14 bits
0
1
1
1
15 bits
1
x
x
x
16 bits
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