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CHAPTER 12 SERIAL INTERFACE 20
User’s Manual U15075EJ2V1UD
246
Figure 12-11. 3-Wire Serial I/O Mode Timing (3/7)
(iv) Master operation (when DAP20 = 0, CKP20 = 1, SSE20 = 0)
1
2
3
4
5
6
7
8
DO7
DO6
DO5
DO4
DO3
DO2
DO1
DO0
DI7
DI6
DI5
DI4
DI3
DI2
DI1
DI0
SCK20
SO20
SI20
SIO20
write
INTCSI20
(v) Slave operation (when DAP20 = 0, CKP20 = 1, SSE20 = 0)
1
2
3
4
5
6
7
8
DI7
DI6
DI5
DI4
DI3
DI2
DI1
DI0
DO7
DO6
DO5
DO4
DO3
DO2
DO1
DO0
SCK20
SI20
SO20
SIO20
write
INTCSI20
SIO20 write (master)
Note
Note
The data of SI20 is loaded at the first rising edge of SCK20. Make sure that the master outputs the
first bit before the first rising of SCK20.
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