CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U14492EJ3V0UD
487
<7>
CSICAE0
CSIM0
<6>
TRMD0
5
CCL
<4>
DIR0
3
CSIT
2
AUTO
1
0
<0>
CSOT0
<7>
CSICAE1
<6>
TRMD1
5
CCL
<4>
DIR1
3
CSIT
2
AUTO
1
0
<0>
CSOT1
Address
FFFFF900H
Initial value
00H
CSIM1
Address
FFFFF910H
Initial value
00H
Bit Position
Bit Name
Function
7
CSICAEn
Enables/disables CSIn operation.
0: Disable CSIn operation.
1: Enable CSIn operation.
The internal CSIn circuit can be reset asynchronously by setting the CSICAEn bit
to 0. For the SCKn and SOn pin output status when the CSICAEn bit = 0, refer to
10.4.5 Output pins
.
6
TRMDn
Specifies transmission/reception mode.
0: Receive-only mode
1: Transmission/reception mode
When the TRMDn bit = 0, receive-only transfer is performed and the SOn pin
output is fixed to low level. Data reception is started by reading the SIRBn
register.
When the TRMDn bit = 1, transmission/reception is started by writing data to the
SOTBn register.
5
CCL
Specifies data length.
0: 8 bits
1: 16 bits
4
DIRn
Specifies transfer direction mode (MSB/LSB).
0: First bit of transfer data is MSB
1: First bit of transfer data is LSB
3
CSIT
Controls delay of interrupt request signal.
0: No delay
1: Delay mode (interrupt request signal is delayed 1/2 cycle).
Caution The delay mode (CSIT bit = 1) is valid only in the master mode
(CKS2 to CSK0 bits of the CSICn register are not 111B). In the
slave mode (CKS2 to CKS0 bits are 111B), do not set the delay
mode.
2
AUTO
Specifies single transfer mode or repeat transfer mode.
0: Single transfer mode
1: Repeat transfer mode
0
CSOTn
Flag indicating transfer status.
0: Idle status
1: Transfer execution status
Caution The CSOTn bit is cleared (0) by writing 0 to the CSICAEn bit.
Remark
n = 0, 1
Содержание V850E/IA1 mPD703116
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