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参数资料
| 型号： | M37478E8TXXXSP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| 封装： | PLASTIC, SDIP-42 |
| 文件页数： | 11/48页 |
| 文件大小： | 720K |
| 代理商： | M37478E8TXXXSP |
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18
MITSUBISHI MICROCOMPUTERS
7477/ 7478 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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.
Clock Synchronous Serial I/O Mode
Clock synchronous serial I/O mode can be selected by setting the
mode selection bit of the serial I/O control register to “1”.
For clock synchronous serial I/O, the transmitter and the receiver
must use the same clock. If an internal clock is used, transfer is
started by a write signal to the transmit or receive buffer.
Fig. 8 Clock synchronous serial I/O block diagram
Fig. 9 Operation of clock synchronous serial I/O function
Transfer shift clock
(1/8 to 1/8192 of the internal
clock, or an external clock)
Serial output TxD
Serial input RxD
Receive enable signal SRDY
Write signal to
receive/transmit buffer
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
Notes 1 : The transmit interrupt request (TI) can be selected to occur either when the transmit buffer has emptied (TBE = 1) or after the
transmit shift operation has ended (TSC = 1), by setting the transmit interrupt source selection bit (TIC) of the serial I/O control
register.
2 : If data is written to the transmit buffer when TSC = 0, the transmit clock is generated continuously and serial data is output
continuously from the TxD pin.
3 : The receive interrupt request (RI) is set when the receive buffer full flag (RBF) becomes “1”.
Data bus
Receive buffer register
Clock control circuit
Serial I/O control register
Fall detect
Serial I/O status register
F/F
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)
Serial I/O synchronous
clock selection
bit (SCS)
Frequency dividing
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
f(XIN)
SRDY
Address 00E016
Address 00E216
Address 00E016
Address 00E116
Address 00E416
CSS
TE
RE
SIOE
Baud rate generator
TIC
Shift clock
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M37478E8TXXXSP/FP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37478E8-XXXFP | 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 |
| M37478E8-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 |
| M37478E8-XXXSP/FP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37478M2TXXXFP | 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 |
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