參數(shù)資料
型號: UPD784021
廠商: NEC Corp.
英文描述: 16/8-BIT SINGLE-CHIP MICROCOMPUTER
中文描述: 16/8-BIT單片機(jī)
文件頁數(shù): 37/90頁
文件大小: 614K
代理商: UPD784021
37
m
PD784020, 784021
8.8 SERIAL INTERFACE
Three independent serial interface channels are incorporated.
Asynchronous serial interface (UART)/three-wire serial I/O (IOE)
2
Synchronous serial interface (CSI)
1
Three-wire serial I/O (IOE)
Serial bus interface (SBI)
So, communication with points external to the system and local communication within the system can be performed
at the same time. (See
Fig. 8-9
.)
Fig. 8-9 Example Serial Interfaces
Note
Handshake line
SB0
SCK
(a) UART + SBI
RS-232-C
driver/
receiver
Port
RxD
TxD
SB0
SCK0
PD75402A (slave)
μ
PD75328 (slave)
μ
PD784021 (master)
μ
PD4711A
μ
V
DD
SB0
SCK
LCD
(UART)
(SBI)
Port
RxD2
TxD2
PD4711A
μ
(UART)
RS-232-C
driver/
receiver
SI
SO
SCK
Port
INT
(b) UART + Three-wire serial I/O
[Three-wire serial I/O]
RS-232-C
driver/
receiver
Port
RxD
TxD
SO0
SI0
SCK0
INTPm
Port
SO1
SI1
SCK1
INTPn
Port
Note
PD75108 (slave)
μ
PD784021 (master)
μ
PD4711A
μ
SI
SO
SCK
Port
INT
Note
PD78014 (slave)
μ
(UART)
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