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參數(shù)資料
| 型號： | M37542F4FP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO36 |
| 封裝： | 8.4 X 15 MM, 0.80 MM PITCH, PLASTIC, SSOP-36 |
| 文件頁數(shù)： | 72/124頁 |
| 文件大?。?/td> | 1238K |
| 代理商： | M37542F4FP |
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7542 Group
Rev.3.03
Jul 11, 2008
Page 49 of 117
REJ03B0006-0303
[Transmit buffer register 1/receive buffer register 1 (TB1/
RB1)] 001816
The transmit buffer register and the receive buffer register are lo-
cated at the same address. The transmit buffer is write-only and
the receive buffer is read-only. If a character bit length is 7 bits, the
MSB of data stored in the receive buffer is “0”.
[Serial I/O1 status register (SIO1STS)] 001916
The read-only serial I/O1 status register consists of seven flags
(bits 0 to 6) which indicate the operating status of the serial I/O1
function and various errors.
Three of the flags (bits 4 to 6) are valid only in UART mode.
The receive buffer full flag (bit 1) is cleared to “0” when the receive
buffer register is read.
If there is an error, it is detected at the same time that data is
transferred from the receive shift register to the receive buffer reg-
ister, and the receive buffer full flag is set. A write to the serial I/O1
status register clears all the error flags OE, PE, FE, and SE (bit 3
to bit 6, respectively). Writing “0” to the serial I/O1 enable bit SIOE
(bit 7 of the serial I/O1 control register) also clears all the status
flags, including the error flags.
Bits 0 to 6 of the serial I/O1 status register are initialized to “0” at
reset, but if the transmit enable bit of the serial I/O1 control regis-
ter has been set to “1”, the transmit shift completion flag (bit 2)
and the transmit buffer empty flag (bit 0) become “1”.
[Serial I/O1 control register (SIO1CON)] 001A16
The serial I/O1 control register consists of eight control bits for the
serial I/O1 function.
[UART1 control register (UART1CON)] 001B16
The UART1 control register consists of four control bits (bits 0 to
3) which are valid when asynchronous serial I/O is selected and
set the data format of an data transfer and one bit (bit 4) which is
always valid and sets the output structure of the P11/TxD1 pin.
[Baud rate generator 1 (BRG1)] 001C16
The baud rate generator determines the baud rate for serial transfer.
The baud rate generator divides the frequency of the count source
by 1/(n + 1), where n is the value written to the baud rate generator.
■ Notes on Serial I/O1
Serial I/O interrupt
When setting the transmit enable bit to “1”, the serial I/O transmit
interrupt request bit is automatically set to “1”. When not requiring
the interrupt occurrence synchronized with the transmission en-
abled, take the following sequence.
Set the serial I/O transmit interrupt enable bit to “0” (disabled).
Set the transmit enable bit to “1”.
Set the serial I/O transmit interrupt request bit to “0” after 1 or
more instructions have been executed.
Set the serial I/O transmit interrupt enable bit to “1” (enabled).
I/O pin function when serial I/O1 is enabled.
The functions of P12 and P13 are switched with the setting values
of a serial I/O1 mode selection bit and a serial I/O1 synchronous
clock selection bit as follows.
(1) Serial I/O1 mode selection bit → “1” :
Clock synchronous type serial I/O is selected.
Setup of a serial I/O1 synchronous clock selection bit
“0” : P12 pin turns into an output pin of a synchronous clock.
“1” : P12 pin turns into an input pin of a synchronous clock.
Setup of a SRDY1 output enable bit (SRDY)
“0” : P13 pin can be used as a normal I/O pin.
“1” : P13 pin turns into a SRDY1 output pin.
(2) Serial I/O1 mode selection bit → “0” :
Clock asynchronous (UART) type serial I/O is selected.
Setup of a serial I/O1 synchronous clock selection bit
“0”: P12 pin can be used as a normal I/O pin.
“1”: P12 pin turns into an input pin of an external clock.
When clock asynchronous (UART) type serial I/O is selected, it is
P13 pin. It can be used as a normal I/O pin.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M37542F4GP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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| M37542F8FP#U0 | 功能描述:IC 740 MCU FLASH 32K 36SSOP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 標準包裝:1 系列:87C 核心處理器:MCS 51 芯體尺寸:8-位 速度:16MHz 連通性:SIO 外圍設備:- 輸入/輸出數(shù):32 程序存儲器容量:8KB（8K x 8） 程序存儲器類型:OTP EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4 V ~ 6 V 數(shù)據(jù)轉換器:- 振蕩器型:外部 工作溫度:0°C ~ 70°C 封裝/外殼:44-DIP 包裝:管件 其它名稱:864285 |
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