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参数资料
| 型号： | PIC16F1527T-I/MR |
| 厂商： | Microchip Technology |
| 文件页数： | 12/94页 |
| 文件大小： | 0K |
| 描述： | MCU 28KB FLASH 1536B RAM 64-QFN |
| 标准包装： | 3,300 |
| 系列： | PIC® XLP™ 16F |
| 核心处理器： | PIC |
| 芯体尺寸： | 8-位 |
| 速度： | 20MHz |
| 连通性： | I²C，LIN，SPI，UART/USART |
| 外围设备： | 欠压检测/复位，POR，PWM，WDT |
| 输入/输出数： | 54 |
| 程序存储器容量： | 28KB（16K x 14） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 1.5K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.3 V ~ 5.5 V |
| 数据转换器： | A/D 30x10b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 64-VFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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181
7810C–AVR–10/12
Atmel ATmega328P [Preliminary]
19.7.5
Parity Checker
The Parity Checker is active when the high USART Parity mode (UPMn1) bit is set. Type of Par-
ity Check to be performed (odd or even) is selected by the UPMn0 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 (UPEn) Flag can then be read by software
to check if the frame had a Parity Error.
The UPEn 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 (UPMn1 = 1). This bit is
valid until the receive buffer (UDRn) is read.
19.7.6
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 RXENn is set to zero) the Receiver will
no longer override the normal function of the RxDn port pin. The Receiver buffer FIFO will be
flushed when the Receiver is disabled. Remaining data in the buffer will be lost
19.7.7
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 UDRn I/O location until the RXCn Flag
is cleared. The following code example shows how to flush the receive buffer.
Note:
For I/O Registers located in extended I/O map, “IN”, “OUT”, “SBIS”, “SBIC”, “CBI”, and “SBI”
instructions must be replaced with instructions that allow access to extended I/O. Typically
“LDS” and “STS” combined with “SBRS”, “SBRC”, “SBR”, and “CBR”.
Assembly Code Example
USART_Flush:
sbis
UCSRnA, RXCn
ret
in
r16, UDRn
rjmp
USART_Flush
C Code Example(1)
void
USART_Flush( void )
{
unsigned char
dummy;
while
( UCSRnA & (1<<RXCn) ) dummy = UDRn;
}
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