UPD784907 Datasheet, PDF (44/98 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD784907, 784908
8.8 Serial Interface
Four independent serial interface channels are incorporated.
• Asynchronous serial interface (UART)/3-wire serial I/O (IOE) × 2
• Synchronous serial interface (CSI) × 2
• 3-wire serial I/O (IOE)
This makes it possible for communication with an external system and local communication within the system to
be simultaneously executed (see Figure 8-10).
Figure 8-10. Example of Serial Interface
UART + 3-wire serial I/O + 2-wire serial I/O
µ PD784908 (master)
µ PD4711A
[3-wire serial I/O]
SO1
[UART]
RxD
RS-232-C
driver/receiver
TxD
Port
SI1
SCK1
Note
INTPm
Port
Slave
SI
SO
SCK
Port
INT
Note Handshake line
VDD VDD
Slave
SI0
SO0
SCK0
INTPn
Port
Note
[2-wire serial I/O]
SB0
SCK0
Port
INT
44
Data Sheet U11680EJ2V0DS00