參數(shù)資料
型號(hào)： M37477M8-241FP
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)： 18/47頁(yè)
文件大?。?/td> 669K
代理商： M37477M8-241FP
18
MITSUBISHI MICROCOMPUTERS
7477/7478 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
buffers have the same address in memory. Since the shift register
cannot be written to or read from directly, transmit data is written
to the transmit buffer, and receive data is read from the receive
buffer. The transmit buffer can also hold the next data to be trans-
mitted, and the receive buffer can hold a character while the next
character is being received.
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 of the serial I/O control
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
Fig. 10 UART serial I/O block diagram
Fig. 11 Operation of UART serial I/O function
Receive buffer register
Clock control circuit
Serial I/O control register
Baud rate generator
Serial I/O status register
1/4
1/4
Transmit shift completion flag (TSC)
Transmit interrupt request (TI)
Transmit buffer empty flag (TBE)
Receive buffer full flag (RBF)
Receive interrupt request (RI)
Frequency dividing ratio 1/(n+1)
P1
4
RE
P1
5
P1
6
Receive shift register
Transmit shift register
Transmit buffer register
T
X
D
S
CLK
R
X
D
f(X
IN
)
Address 00E0
16
Address 00E2
16
Address 00E0
16
Address 00E1
16
7-bit
1/16
1/16
UART control register
Address 00E3
16
ST/SP/PA generation
Serial I/O synchronous clock
selection bit
OE
SP detection
8-bit
PE
FE
ST detection
Character
length
selection
bit
Data bus
Data bus
TE
TIC
ST
D
0
D
1
SP
ST
D
0
D
1
SP
Transmit or receive clock
Transmit buffer write signal
Serial output TxD
Receive buffer read signal
Serial input RxD
TBE=0
TSC=0
TBE=1
TBE=0
TBE=1
RBF=0
RBF=1
RBF=1
TSC=1
1 start bit
7 or 8 data bits
1 or 0 parity bit
1 or 2 stop bit(s)
ST
D
0
D
1
SP
ST
D
1
SP
8
8
Generated at 2nd bit in 2
-
stop
-
bit mode
Notes 1 : Error flag detection occurs at the same time that the RBF flag becomes “1” (at 1st stop bit during reception).
2 : The transmit interrupt (TI) can be selected to occur when either the TBE or TSC flag becomes “1,” depending on the
setting of the transmit interrupt source selection bit (TIC) of the serial I/O control register.
3 : The receive interrupt (RI) is set when the RBF flag becomes “1”.
D
0
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37477M8TXXXFP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES
M37477M8TXXXSP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES
M37477M8TXXXSP/FP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M37477M8-XXXFP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES
M37477M8-XXXSP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES
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