UPD784044 Datasheet, PDF (36/90 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD784044(A), 784046(A)
7.6 Serial Interface
The µPD784046(A) is provided with two independent serial interface channels.
• Asynchronous serial interface (UART)/3-wire serial I/O (IOE) × 2
By using these serial interface channels, communication with an external device and local communication
within a system can be performed at the same time (refer to Figure 7-7).
Figure 7-7. Example of Serial Interface
RS-232C
driver/
receiver
µPD784046(A) master
(UART)
RxD
TxD
Port
SO2
SI2
SCK2
INTPn
Port
(3-wire serial I/O)
Note
SI
SO
SCK
Port
INT
slave
Note Handshake line
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