upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 477

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

14.3.2 Serial Data Direction Select Function
The serial data direction is selectable using the DIR bit in the CSIM register. The examples below show
the communication for data length of 8 bit (CCL[3:0] = [1,0,0,0]):
SO3
SO3
Write operation from SFDB to FIFO
Write operation from SFDB to FIFO
15
15
15
15
SCK3
SCK3
Figure 14-12: Serial Data Direction Select Function
SO3
SO3
SI3
SI3
SFDB
SFDB
FIFO
FIFO
SIO
SIO
8 7
8 7
8 7
8 7
Chapter 14 Queued CSI (CSI30, CSI31)
User’s Manual U16702EE3V2UD00
DO7
DO0
DI7
DI0
0
0
(a) MSB first (DIR = 0)
0
0
(b) LSB first (DIR = 0)
DO6
DO1
DI1
DI6
SI3
SI3
DO5
DO2
DI2
DI5
SO3
SO3
DO4
DO3
DI4
DI3
Read operation from SIRB
Read operation from SIRB
DO3
DO4
15
15
DI3
DI4
15
15
DO2
DO5
DI2
DI5
Read value
Read value
SIRB
SIRB
SIO
SIO
8 7
8 7
8 7
8 7
DO1
DO6
DI1
DI6
DO7
DO0
DI0
DI7
0
0
0
0
SI3
SI3
477