參數(shù)資料
型號: μPD784036(A)
廠商: NEC Corp.
英文描述: 8/16 Bit Single Chip Microcontrollers(8/16 位單片微控制器)
中文描述: 8 / 16位單片機微控制器(8 / 16位單片微控制器)
文件頁數(shù): 38/90頁
文件大?。?/td> 402K
代理商: ΜPD784036(A)
μ
PD784035(A), 784036(A)
38
7.8.1 Asynchronous serial interface/three-wire serial I/O (UART/IOE)
Two serial interface channels are available; for each channel, asynchronous serial interface mode or three-wire
serial I/O mode can be selected.
(1) Asynchronous serial interface mode
In this mode, 1-byte data is transferred after a start bit.
A baud rate generator is incorporated to enable communication at a wide range of baud rates.
Moreover, the frequency of a clock signal applied to the ASCK pin can be divided to define a baud rate.
With the baud rate generator, the baud rate conforming to the MIDI standard (31.25 kbps) can be obtained.
Figure 7-10. Block Diagram of Asynchronous Serial Interface Mode
RXB, RXB2
TXS, TXS2
INTST, INTST2
INTSR,
INTSR2
INTSER,
INTSER2
1/2m
f
XX
/2
ASCK, ASCK2
TxD, TxD2
RxD, RxD2
1/2
n+1
1/2m
Baud rate generator
Receive
shift register
Receive buffer
S
Transmission
control parity
bit addition
Transmission
shift register
Internal bus
Reception
control parity
check
Remark
f
XX
: Oscillator frequency or external clock input
n = 0 to 11
m = 16 to 30
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