參數(shù)資料
型號(hào)： M38501D1
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述： 單芯片8位CMOS微機(jī)
文件頁(yè)數(shù)： 18/52頁(yè)
文件大?。?/td> 807K
代理商： M38501D1
18
3850 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
(2) Asynchronous Serial I/O (UART) Mode
Clock asynchronous serial I/O mode (UART) can be selected by
clearing the serial I/O mode selection bit (b6) of the serial I/O con-
trol register to “0”.
Eight serial data transfer formats can be selected, and the transfer
formats used by a transmitter and receiver must be identical.
The transmit and receive shift registers each have a buffer, but the
two buffers have the same address in memory. Since the shift reg-
ister cannot be written to or read from directly, transmit data is
written to the transmit buffer register, and receive data is read from
the receive buffer register.
The transmit buffer register can also hold the next data to be
transmitted, and the receive buffer register can hold a character
while the next character is being received.
Fig.17 Block diagram of UART serial I/O
X
IN
1/4
OE
PE FE
1/16
1/16
Data bus
Receive buffer register
Address 0018
16
Receive shift register
Receive buffer full flag (RBF)
Receive interrupt request (RI)
Baud rate generator
Address 001C
16
Frequency division ratio 1/(n+1)
ST/SP/PA generator
Transmit buffer register
Data bus
Transmit shift register
Address
0018
16
Transmit shift completion flag (TSC)
Transmit buffer empty flag (TBE)
Address
0019
16
Serial I/O status register
Transmit interrupt request (TI)
ST detector
SP detector
UART control register
Address 001B
16
Character length selection bit
Address 001A
16
BRG count source selection bit
Transmit interrupt source selection bit
Serial I/O synchronous clock selection bit
Clock control circuit
Character length selection bit
7 bits
8 bits
Serial I/O control register
P2
6
/S
CLK1
P2
4
/R
X
D
P2
5
/T
X
D
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M38501E1H-XXXFP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
M38501E1H-XXXSP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
M38501E1H-XXXSS 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
M38501E1-XXXFP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
M38501E1-XXXSP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
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