CHAPTER 12 SERIAL INTERFACE 20
Figure 12-11. 3-Wire Serial I/O Mode Timing (3/7)
(iv) Master operation (when DAP20 = 0, CKP20 = 1, SSE20 = 0)
SIO20
write
1
2
3
4
5
6
7
8
SCK20
SO20
DO7
DO6
DI6
DO5
DI5
DO4
DI4
DO3
DI3
DO2
DI2
DO1
DI1
DO0
DI0
DI7
SI20
INTCSI20
(v) Slave operation (when DAP20 = 0, CKP20 = 1, SSE20 = 0)
SIO20
write
1
2
3
4
5
6
7
8
SCK20
SIO20 write (master)Note
SI20
DI7
DI6
DI5
DI4
DI3
DI2
DI1
DI0
DO7
DO6
DO5
DO4
DO3
DO2
DO1
DO0
SO20
INTCSI20
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.
User’s Manual U15075EJ1V0UM00
242
NEC [ NEC ]
