UPD78F9418AGK-9EU Renesas Electronics America, UPD78F9418AGK-9EU Datasheet - Page 200

• Manufacturer Part Number: UPD78F9418AGK-9EU
• Manufacturer: Renesas Electronics America

Specifications of UPD78F9418AGK-9EU

• Lead Free Status / Rohs Status: Supplier Unconfirmed

13.4.3 3-wire serial I/O mode
incorporate a conventional synchronous serial interface, such as the 75XL Series, 78K Series, and 17K Series.
198
The 3-wire serial I/O mode is useful for connection of peripheral I/Os and display controllers, etc., which
Communication is performed using three lines: the serial clock (SCK), serial output (SO), and serial input (SI).
(1)
CSIM00
Symbol
Register setting
3-wire serial I/O mode settings are performed using serial operation mode register 00 (CSIM00),
asynchronous serial interface mode register 00 (ASIM00), and baud rate generator control register 00
(BRGC00).
(a)
Serial operation mode register 00 (CSIM00)
CSIM00 is set using a 1-bit or 8-bit memory manipulation instruction.
RESET input sets CSIM00 to 00H.
Caution Bits 0 and 3 to 6 must be fixed to 0.
CSIE00
CSIE00
CSCK00
DIR00
<7>
0
1
0
1
0
1
Operation stopped
Operation enabled
MSB
LSB
Clock input to SCK pin from external
Dedicated baud rate generator output
6
0
5
0
4
0
CHAPTER 13 SERIAL INTERFACE 00
3
0
User’s Manual U13952EJ3V1UD
DIR00 CSCK00
Operation control in 3-wire serial I/O mode
Clock selection in 3-wire serial I/O mode
2
1
Start bit specification
0
0
Address
FF72H
After reset
00H
R/W
R/W