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参数资料
| 型号： | M37546G4SP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| 封装： | 8.90 X 28 MM, 1.78 MM PITCH, PLASTIC, SDIP-32 |
| 文件页数： | 54/105页 |
| 文件大小： | 1105K |
| 代理商： | M37546G4SP |
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REJ03B0160-0122 Rev.1.22 Mar 13, 2009
page 50 of 100
7546 Group
Fig. 62 Block diagram of UART serial I/O2
(2) Asynchronous Serial I/O2 (UART) Mode
Clock asynchronous serial I/O mode (UART) can be selected by
clearing the serial I/O2 mode selection bit of the serial I/O2 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. 63 Operation of UART serial I/O2 function
XIN
1/4
OE
PE FE
1/16
Data bus
Receive buffer register 2
Address 002E16
Receive shift register 2
Receive buffer full flag (RBF)
Receive interrupt request (RI)
Baud rate generator 2
Frequency division ratio 1/(n+1)
Address 003216
ST/SP/PA generator
Transmit buffer register 2
Data bus
Transmit shift register 2
Address 002E16
Transmit shift completion flag (TSC)
Transmit buffer empty flag (TBE)
Transmit interrupt request (TI)
Address 002F16
ST detector
SP detector
UART2 control register
Address 003116
Character length selection bit
Address 003016
BRG count source selection bit
Transmit interrupt source selection bit
Serial I/O2 synchronous clock selection bit
Clock control circuit
Character length selection bit
7 bits
8 bits
Serial I/O2 control register
P06/SCLK2
Serial I/O2 status register
P04/RXD2
P05/TXD2
TSC=0
TBE=1
RBF=0
TBE=0
RBF=1
ST
D0
D1
SP
D0
D1
ST
SP
TBE=1
TSC=1
ST
D0
D1
SP
D0
D1
ST
SP
Transmit or receive clock
Transmit buffer 2
write signal
Generated at 2nd bit in 2-stop-bit mode
1 start bit
7 or 8 data bit
1 or 0 parity bit
1 or 2 stop bit (s)
1: Error flag detection occurs at the same time that the RBF flag becomes “1” (at 1st stop bit, during reception).
2: As the transmit interrupt (TI), when either the TBE or TSC flag becomes “1,” can be selected to occur depending on the setting of the transmit
interrupt source selection bit (TIC) of the serial I/O2 control register.
3: The receive interrupt (RI) is set when the RBF flag becomes “1.”
4: After data is written to the transmit buffer when TSC=1, 0.5 to 1.5 cycles of the data shift cycle is necessary until changing to TSC=0.
Notes
Serial output TXD2
Serial input RXD2
Receive buffer 2
read signal
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相关代理商/技术参数 |
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|---|---|
| M37546G4SP#U0 | 功能描述:MCU 2/5V 16KB 32-SDIP QZ-ROM RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 标准包装:250 系列:80C 核心处理器:8051 芯体尺寸:8-位 速度:16MHz 连通性:EBI/EMI，I²C，UART/USART 外围设备:POR，PWM，WDT 输入/输出数:40 程序存储器容量:- 程序存储器类型:ROMless EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-LCC（J 形引线） 包装:带卷 (TR) |
| M37546G4-XXXGP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37546G4-XXXHP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37546G4-XXXSP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37547G2FP | 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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