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參數(shù)資料
| 型號(hào)： | R5F212ACSNFA |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP48 |
| 封裝： | 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-48 |
| 文件頁(yè)數(shù)： | 13/138頁(yè) |
| 文件大?。?/td> | 492K |
| 代理商： | R5F212ACSNFA |
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198
4317K–AVR–03/2013
AT90PWM2/3/2B/3B
Figure 18-5. Data OverRun example
The Parity Error (UPE) Flag indicates that the next frame in the receive buffer had a Parity Error
when received. If Parity Check is not enabled the UPE bit will always be read zero. For compati-
bility with future devices, always set this bit to zero when writing to UCSRA. For more details see
18.7.5
Parity Checker
The Parity Checker is active when the high USART Parity mode (UPM1) bit is set. Type of Parity
Check to be performed (odd or even) is selected by the UPM0 bit. When enabled, the Parity
Checker calculates the parity of the data bits in incoming frames and compares the result with
the parity bit from the serial frame. The result of the check is stored in the receive buffer together
with the received data and stop bits. The Parity Error (UPE) flag can then be read by software to
check if the frame had a Parity Error.
The UPE bit is set if the next character that can be read from the receive buffer had a Parity
Error when received and the Parity Checking was enabled at that point (UPM1 = 1). This bit is
valid until the receive buffer (UDR) is read.
18.7.6
Disabling the Receiver
In contrast to the Transmitter, disabling of the Receiver will be immediate. Data from ongoing
receptions will therefore be lost. When disabled (i.e., the RXEN is set to zero) the Receiver will
no longer override the normal function of the RxD port pin. The Receiver buffer FIFO will be
flushed when the Receiver is disabled. Remaining data in the buffer will be lost
18.7.7
Flushing the Receive Buffer
The receiver buffer FIFO will be flushed when the Receiver is disabled, i.e., the buffer will be
emptied of its contents. Unread data will be lost. If the buffer has to be flushed during normal
operation, due to for instance an error condition, read the UDR I/O location until the RXC flag is
cleared.
The following code example shows how to flush the receive buffer.
CH1
CH2
CH3
RxD
RxC
DOR
t
Software Access
to Receive buffer
RxC=1
UDR=CH1
DOR=0
RxC=1
UDR=CH2
DOR=0
RxC=1
UDR=XX
DOR=1
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| R5F212BASNFA | 16-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP48 |
| R5F212ACSDFP | 16-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP48 |
| R5F212BCSNFP | 16-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP48 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R5F212ACSNFA#U0 | 制造商:Renesas Electronics Corporation 功能描述:MCU 16-bit R8C CISC 128KB Flash 2.5V/3.3V/5V 64-Pin LQFP 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 128KB FLASH 64LQFP |
| R5F212ACSNFA#V0 | 功能描述:MCU FLASH 128KB 64-LQFP RoHS:是 類(lèi)別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:R8C/2x/2A 標(biāo)準(zhǔn)包裝:96 系列:PIC® 16F 核心處理器:PIC 芯體尺寸:8-位 速度:20MHz 連通性:I²C，SPI 外圍設(shè)備:欠壓檢測(cè)/復(fù)位，POR，PWM，WDT 輸入/輸出數(shù):11 程序存儲(chǔ)器容量:3.5KB（2K x 14） 程序存儲(chǔ)器類(lèi)型:閃存 EEPROM 大小:- RAM 容量:128 x 8 電壓 - 電源 (Vcc/Vdd):2.3 V ~ 5.5 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 ~ 125°C 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 包裝:管件 |
| R5F212ACSNFA#V2 | 制造商:Renesas Electronics Corporation 功能描述:R8C/2A 128K/7.5K 64LQFP 14X14 - Trays 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 128KB FLASH |
| R5F212ACSNFP | 制造商:Renesas Electronics Corporation 功能描述:Microcontroller,R8C/2A,ROM128K |
| R5F212ACSNFP#U0 | 制造商:Renesas Electronics Corporation 功能描述:MCU 16-Bit R8C CISC 128KB Flash 2.5V/3.3V/5V 64-Pin LQFP 制造商:Renesas Electronics Corporation 功能描述:MCU 16BIT R8C CISC 128KB FLASH 2.5V/3.3V/5V 64LQFP - Trays 制造商:Renesas Electronics 功能描述:R8C 20MHz 制造商:Renesas 功能描述:MCU 16-Bit R8C CISC 128KB Flash 2.5V/3.3V/5V 64-Pin LQFP |
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