參數(shù)資料
型號: μPD789111
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 20/48頁
文件大?。?/td> 221K
代理商: ΜPD789111
Preliminary Product Information
20
μ
PD789111, 789112, 789114
5.5
Serial Interface
One-channel serial interface is incorporated.
Serial interface 20 supports the following two modes:
Three-wire serial I/O mode
:
A function to select the clock phase or data phase is
incorporated.
The dedicated baud rate generator is incorporated.
Asynchronous serial interface (UART) mode:
Figure 5-6. Block Diagram of Serial Interface 20
SI20/P22/R
X
D20
SO20/P21/T
X
D20
SS20/P23
/INTP0/CPT20
INTST20
f
X
/2-f
X
/2
8
INTSR20/INTCSI20
ASCK20/P21
/SCK20
Internal bus
Reception buffer
register
(RXB20/SIO20)
Transmission buffer
register
(RXS20/SIO20)
Reception shift register
Data phase
control
Clock phase
control
Transmission
data counter
Transmission
data counter
Selector
Baud rate generator
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