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参数资料
| 型号： | M37481M8-XXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | 10 X 10 MM, 0.80 MM PITCH, PLASTIC, QFP-44 |
| 文件页数： | 29/100页 |
| 文件大小： | 1457K |
| 代理商： | M37481M8-XXXFP |
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31
MITSUBISHI MICROCOMPUTERS
7480/7481 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
the serial I/O mode selection bit of the serial I/O control register
(address 00E216) to “1”.
In the clock synchronous serial I/O, the transmitter-side microcom-
puter and the receiver-side microcomputer must use the same
clock for serial I/O operation. If an internal clock is used as oper-
ating clock, a transfer is started by a write signal to the transmit/
receive buffer register.
Fig. 28 Block diagram of clock synchronous serial I/O
Fig. 29 Operation of clock synchronous serial I/O function
Data bus
Receive buffer register
Clock control circuit
Serial I/O control register
Falling edge
detection
Serial I/O status register
F/F
1/4
Transmit shift register shift completion flag (TSC)
Transmit interrupt request (TI)
Transmit buffer empty flag (TBE)
Receive buffer full flag (RBF)
Receive interrupt request (RI)
Serial I/O synchronous
clock selection
bit (SCS)
Frequency division
ratio 1/(n+1)
P16
P14
Shift clock
P15
P17
Clock control circuit
Receive shift register
Transmit shift register
Transmit buffer register
TXD
SRDY
SCLK
RXD
XIN
SRDY output enable
bit (SRDY)
Address 00E016
Address 00E216
Address 00E016
Address 00E116
Address 00E416
BRG count source
selection bit (CSS)
Transmit interrupt source
selection bit (TIC)
Transmit enable
bit (TE)
Receive
enable bit
(RE)
Serial I/O enable bit
(SIOE)
Baud rate generator
Serial I/O
Serial I/O can be used as either clock synchronous or asynchro-
nous (UART) serial I/O. A dedicated timer (baud rate generator) is
also provided for baud rate generation when serial I/O is in opera-
tion.
(1) Clock Synchronous Serial I/O Mode
The clock synchronous serial I/O mode can be selected by setting
D0
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
TBE = 0
TBE = 1
TSC = 0
RBF = 1
TSC = 1
Overrun error (OE) detection
Transmit/receive shift clock,
1/8 – 1/8192 of internal clock, or
external clock
Serial output TxD
Serial input RxD
Receive enable signal SRDY
Write signal to receive/
transmit buffer register
(address 00E016)
Notes 1 : The transmit interrupt (TI) can be selected to be generated either when the transmit buffer is empty (TBE = 1) or after the
transmit shift operation is completed (TSC = 1) by using the transmit interrupt source selection bit (TIC) of the serial I/O control
register.
2 : If data is written to the transmit buffer register when TSC = 0, the transmit clock is generated continuously, and serial data is
output continuously from the TxD pin.
3 : The receive interrupt (RI) is set when the receive buffer full flag (RBF) becomes “1”.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M37481M8-XXXSP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES |
| M37481MT-088FP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37481MXT | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37481MXT-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37481MXT-XXXSP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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