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参数资料
| 型号： | M37512F8-XXXHP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48 |
| 封装： | 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48 |
| 文件页数： | 16/89页 |
| 文件大小： | 877K |
| 代理商： | M37512F8-XXXHP |
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Feb 18, 2005
page 21 of 85
REJ03B0122-0101
7512 Group
(2) Asynchronous Serial I/O (UART) Mode
Clock asynchronous serial I/O mode (UART) can be selected by
clearing the serial I/O1 mode selection bit (b6) of the serial I/O1
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 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. 19 Block diagram of UART serial I/O1
XIN
1/4
OE
PE FE
1/16
Data bus
Receive buffer register
Address 001816
Receive shift register
Receive buffer full flag (RBF)
Receive interrupt request (RI)
Baud rate generator
Frequency division ratio 1/(n+1)
Address 001C16
ST/SP/PA generator
Transmit buffer register
Data bus
Transmit shift register
Address 001816
Transmit shift completion flag (TSC)
Transmit buffer empty flag (TBE)
Transmit interrupt request (TI)
Address 001916
ST detector
SP detector
UART control register
Address 001B16
Character length selection bit
Address 001A16
BRG count source selection bit
Transmit interrupt source selection bit
Serial I/O1 synchronous clock selection bit
Clock control circuit
Character length selection bit
7 bits
8 bits
Serial I/O1 control register
P26/SCLK1
Serial I/O1 status register
P24/RXD
P25/TXD
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M37512FCHHP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37512FCHP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37512FCH-XXXHP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37512FC-XXXHP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M-375-1-342 | 制造商:Brady Corporation 功能描述:WIRE MARKER SLEEVES, HEAT-SHRINK, 1.015"W, 80; Marker Material:PO (Polyolefin); Marker Dimensions:16.38mm x 25.78mm; Legend:Blank (No Legend); Legend Color:Black; Background Color:White; Color:Black on White; Series:M ;RoHS Compliant: Yes |
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