參數(shù)資料
型號： AT91M40807-33AI
廠商： ATMEL CORP
元件分類： 微控制器/微處理器
英文描述： Microcontroller
中文描述： 32-BIT, MROM, 33 MHz, RISC MICROCONTROLLER, PQFP100
封裝： 1.40 MM HEIGHT, TQFP-100
文件頁數(shù)： 115/153頁
文件大小： 1837K
代理商： AT91M40807-33AI
115
AT91X40 Series
1354D
–
ATARM
–
05/02
USART Channel Status Register
Name
:
US_CSR
Access Type
:Read Only
Reset Value
: 0x18
Offset
:
0x14
RXRDY: Receiver Ready (Code Label
US_RXRDY
)
0 = No complete character has been received since the last read of the US_RHR or the receiver is disabled.
1 = At least one complete character has been received and the US_RHR has not yet been read.
TXRDY: Transmitter Ready (Code Label
US_TXRDY
)
0 = US_THR contains a character waiting to be transferred to the Transmit Shift Register, or an STTBRK command has
been requested.
1 = US_THR is empty and there is no Break request pending TSR availability.
Equal to zero when the USART is disabled or at reset. Transmitter Enable command (in US_CR) sets this bit to one.
RXBRK: Break Received/End of Break (Code Label
US_RXBRK
)
0 = No Break Received nor End of Break has been detected since the last
“
Reset Status Bits
”
command in the Control
Register.
1 = Break Received or End of Break has been detected since the last
“
Reset Status Bits
”
command in the Control Register.
ENDRX: End of Receiver Transfer (Code Label
US_ENDRX
)
0 = The End of Transfer signal from the Peripheral Data Controller channel dedicated to the receiver is inactive.
1 = The End of Transfer signal from the Peripheral Data Controller channel dedicated to the receiver is active.
ENDTX: End of Transmitter Transfer (Code Label
US_ENDTX
)
0 = The End of Transfer signal from the Peripheral Data Controller channel dedicated to the transmitter is inactive.
1 = The End of Transfer signal from the Peripheral Data Controller channel dedicated to the transmitter is active.
OVRE: Overrun Error (Code Label
US_OVRE
)
0 = No byte has been transferred from the Receive Shift Register to the US_RHR when RxRDY was asserted since the last
“
Reset Status Bits
”
command.
1 = At least one byte has been transferred from the Receive Shift Register to the US_RHR when RxRDY was asserted
since the last
“
Reset Status Bits
”
command.
FRAME: Framing Error (Code Label
US_FRAME
)
0 = No stop bit has been detected low since the last
“
Reset Status Bits
”
command.
1 = At least one stop bit has been detected low since the last
“
Reset Status Bits
”
command.
31
–
30
–
29
–
28
–
27
–
26
–
25
–
24
–
23
–
22
–
21
–
20
–
19
–
18
–
17
–
16
–
15
–
14
–
13
–
12
–
11
–
10
–
9
8
TXEMPTY
TIMEOUT
7
6
5
4
3
2
1
0
PARE
FRAME
OVRE
ENDTX
ENDRX
RXBRK
TXRDY
RXRDY
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AT91M42800 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers
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