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Chapter 17
Clocked Serial Interface (CSIB)
Preliminary User’s Manual U17566EE1V2UM00
(1)
CBnCTL0 - CSIBn control register 0
CBnCTL0 is a register that controls the CSIBn serial transfer operation.
Access
This register can be read/written in 8-bit or 1-bit units.
Address
<base>
Initial Value
01
H
. This register is cleared by any reset.
7
6
5
4
3
2
1
0
CBnPWR CBnTXE
a
a)
These bits can only be rewritten when the CBnPWR bit = 0. However, CBnPWR
bit = 1 can also be set at the same time as rewriting these bits.
CBnRXE
a
CBnDIR
a
0
0
CBnTMS
a
CBnSCE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Table 17-3
CBnCTL0 register contents (1/2)
Bit position
Bit name
Function
7
CBnPWR
CSIBn operation disable/enable:
0: Disable CSIBn operation and reset the CSIBn registers
1: Enable CSIBn operation
The CBnPWR bit controls the CSIBn operation and resets the internal circuit.
6
CBnTXE
Transmit operation disable/enable:
0: Disable transmit operation
1: Enable transmit operation
The SOBn output is low level when the CBnTXE bit is 0.
5
CBnRXE
Receive operation disable/enable:
0: Disable receive operation
1: Enable receive operation
When the CBnRXE bit is cleared to 0, no reception complete interrupt is output
even when the prescribed data is transferred in order to disable the receive
operation, and the receive data (CBnRX register) is not updated.
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