Figure 17-13: Data Transfer Direction Specification (Lsb First) - NEC V850E/PH2 User Manual

(2) LSB first (DIRn bit = 1)

Figure 17-13: Data Transfer Direction Specification (LSB first)

(a) Transfer direction: LSB first, Transfer data length: 8 Bits
SCK3n (I/O)
SI3n (input)
SO3n (output)
SO3n
CSIBUFn or SIRB3n
μPD70F3187:
Remark:
μPD70F3447:
698
Chapter 17 Clocked Serial Interface 3 (CSI3)
DI0 DI1
DO0 DO1
(b) Writing from SFDB3n register to CSIBUFn register
15
SFDB3n
CSIBUFn Data
(c) Reading from CSIBUFn register or SFDB3n register
15
SFDB3n
00H
(read value)
SO3n
n = 0, 1
n = 0
User's Manual U16580EE3V1UD00
DI2 DI3 DI4
DO2 DO3 DO4
8 7 0
00H
SIO3n
8 7
Data
SIO3n
DI5 DI6
DO5 DO6
SI3n
0
SI3n
DI7
DO7