參數(shù)資料
型號(hào): MR80C52CXXX-36/883:R
廠商: TEMIC SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 36 MHz, MICROCONTROLLER, CQCC44
文件頁(yè)數(shù): 109/142頁(yè)
文件大?。?/td> 25028K
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197
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
Bit 0 – UCPOLn: Clock Polarity
This bit is used for synchronous mode only. Write this bit to zero when asynchronous mode is
used. The UCPOLn bit sets the relationship between data output change and data input sample,
and the synchronous clock (XCKn).
19.11.5
UBRRnL and UBRRnH – USART Baud Rate Registers
Bit 15:12 – Reserved
These bits are reserved for future use. For compatibility with future devices, these bit must be
written to zero when UBRRH is written.
Bit 11:0 – UBRR11:0: USART Baud Rate Register
This is a 12-bit register which contains the USART baud rate. The UBRRH contains the four
most significant bits, and the UBRRL contains the eight least significant bits of the USART baud
rate. Ongoing transmissions by the Transmitter and Receiver will be corrupted if the baud rate is
changed. Writing UBRRL will trigger an immediate update of the baud rate prescaler.
Table 19-8.
UCPOLn bit settings.
UCPOLn
Transmitted data changed (output of
TxDn pin)
Received data sampled (input on RxDn
pin)
0
Rising XCKn Edge
Falling XCKn Edge
1
Falling XCKn Edge
Rising XCKn Edge
Bit
151413121110
9
8
UBRR[11:8]
UBRRnH
UBRR[7:0]
UBRRnL
76543210
Read/Write
RRRR
R/W
Initial Value
00000000
相關(guān)PDF資料
PDF描述
MR80C52EXXX-16SHXXX:RD 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CQCC44
MQ80C32-12SHXXX:D 8-BIT, 12 MHz, MICROCONTROLLER, CQFP44
MQ80C32-20SHXXX:RD 8-BIT, 20 MHz, MICROCONTROLLER, CQFP44
MC80C52CXXX-36:D 8-BIT, MROM, 36 MHz, MICROCONTROLLER, CDIP40
MC80C52XXX-36/883:D 8-BIT, MROM, 36 MHz, MICROCONTROLLER, CDIP40
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