CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U15195EJ5V0UD
495
(b) Clock phase selection
The following shows the timing when changing the conditions for clock phase selection (CKP bit of
CSICn register) and data phase selection (DAP bit of CSICn register) under the following conditions.
•
Data length = 8 bits (CCL bit of CSIMn register = 0)
•
First bit of transfer data = MSB (DIRn bit of CSIMn register = 0)
•
No interrupt request signal delay control (CSIT bit of CSIMn register = 0)
Figure 10-28. Timing Chart According to Clock Phase Selection (1/2)
(a) When CKP bit = 0, DAP bit = 0
DI7
DI6
DI5
DI4
DI3
DI2
DI1
DO7
DO6
DO5
DO4
DO3
DO2
DO1
SCKn (I/O)
SIn (input)
SOn (output)
Reg_R/W
INTCSIn interrupt
CSOTn bit
DI0
DO0
(b)
When CKP bit = 1, DAP bit = 0
DI7
DI6
DI5
DI4
DI3
DI2
DI1
DO7
DO6
DO5
DO4
DO3
DO2
DO1
SCKn (I/O)
SIn (input)
SOn (output)
Reg_R/W
INTCSIn interrupt
CSOTn bit
DI0
DO0
Remarks 1.
n = 0, 1
2.
Reg_R/W: Internal signal. This signal indicates that receive data buffer register (SIRBn/
SIRBLn) read or transmit data buffer register (SOTBn/SOTBLn) write was
performed
.
Содержание PD703114
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