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參數(shù)資料
| 型號(hào)： | M37548G2-XXXFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO20 |
| 封裝： | 4.40 X 6.50 MM, 0.65 MM PITCH, PLASTIC, LSSOP-20 |
| 文件頁數(shù)： | 32/84頁 |
| 文件大?。?/td> | 1427K |
| 代理商： | M37548G2-XXXFP |
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Rev.2.02
Mar 31, 2009
Page 38 of 81
REJ03B0210-0202
7548 Group
[Transmit buffer register/receive buffer register (TB/
RB)] 001816
The transmit buffer register and the receive buffer register are
located 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/O status register (SIOSTS)] 001916
The read-only serial I/O status register consists of seven flags
(bits 0 to 6) which indicate the operating status of the serial I/O
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
register, and the receive buffer full flag is set. A write to the
serial I/O status register clears all the error flags OE, PE, FE, and
SE (bit 3 to bit 6, respectively). Writing “0” to the serial I/O
enable bit SIOE (bit 7 of the serial I/O control register) also
clears all the status flags, including the error flags.
Bits 0 to 6 of the serial I/O status register are initialized to “0” at
reset, but if the transmit enable bit of the serial I/O control
register has been set to “1”, the transmit shift completion flag (bit
2) and the transmit buffer empty flag (bit 0) become “1”.
[Serial I/O control register (SIOCON)] 001A16
The serial I/O control register consists of eight control bits for
the serial I/O function.
[UART control register (UARTCON)] 001B16
The UART 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 P05/TxD pin.
[Baud rate generator (BRG)] 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
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 enabled, take the following sequence.
1. Set the serial I/O transmit interrupt enable bit to “0” (dis-
abled).
2. Set the transmit enable bit to “1”.
3. Set the serial I/O transmit interrupt request bit to “0” after 1
or more instructions have been executed.
4. Set the serial I/O transmit interrupt enable bit to “1”
(enabled).
I/O pin function when serial I/O is enabled.
The functions of P06 and P07 are switched with the setting values
of a serial I/O mode selection bit and a serial I/O synchronous
clock selection bit as follows.
(1) Serial I/O mode selection bit
→ “1” :
Clock synchronous type serial I/O is selected.
Setup of a serial I/O synchronous clock selection bit
“0” : P06 pin turns into an output pin of a synchronous clock.
“1” : P06 pin turns into an input pin of a synchronous clock.
Setup of a SRDY output enable bit (SRDY)
“0” : P07 pin can be used as a normal I/O pin.
“1” : P07 pin turns into a SRDY output pin.
(2) Serial I/O mode selection bit
→ “0” :
Clock asynchronous (UART) type serial I/O is selected.
Setup of a serial I/O synchronous clock selection bit
“0” : P06 pin can be used as a normal I/O pin.
“1” : P06 pin turns into an input pin of an external clock.
When clock asynchronous (UART) type serial I/O is selected, it
is P07 pin. It can be used as a normal I/O pin.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37548G3FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37548G3FP#U0 | 功能描述:MCU 6K ROM 256K 20-SSOP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 標(biāo)準(zhǔn)包裝:250 系列:LPC11Uxx 核心處理器:ARM? Cortex?-M0 芯體尺寸:32-位 速度:50MHz 連通性:I²C，Microwire，SPI，SSI，SSP，UART/USART，USB 外圍設(shè)備:欠壓檢測(cè)/復(fù)位，POR，WDT 輸入/輸出數(shù):40 程序存儲(chǔ)器容量:96KB（96K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:4K x 8 RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):1.8 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:48-LQFP 包裝:托盤 其它名稱:568-9587 |
| M37548G3-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37549G1FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37549G1-XXXFP | 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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