Datasheet

364
32133D–11/2011
UC3D
20.7.6 Channel Status Register
Name:
CSR
Access Type: Read-only
Offset: 0x14
Reset Value: 0x00000000
CTS: Image of CTS Input
0: CTS is low.
1: CTS is high.
CTSIC: Clear to Send Input Change Flag
0: No change has been detected on the CTS pin since the last CSR read.
1: At least one change has been detected on the CTS pin since the last CSR read.
NACK: Non Acknowledge
0: No Non Acknowledge has been detected since the last RSTNACK.
1: At least one Non Acknowledge has been detected since the last RSTNACK.
RXBUFF: Reception Buffer Full
0: The Buffer Full signal from the Peripheral DMA Controller channel is inactive.
1: The Buffer Full signal from the Peripheral DMA Controller channel is active.
ITER/UNRE: Max number of Repetitions Reached or SPI Underrun Error
If USART does not operate in SPI Slave Mode:
ITER=0: Maximum number of repetitions has not been reached since the last RSTSTA.
ITER=1: Maximum number of repetitions has been reached since the last RSTSTA.
If USART operates in SPI Slave Mode:
UNRE=0: No SPI underrun error has occurred since the last RSTSTA.
UNRE=1: At least one SPI underrun error has occurred since the last RSTSTA.
TXEMPTY: Transmitter Empty
0: The transmitter is either disabled or there are characters in THR, or in the transmit shift register.
1: There are no characters in neither THR, nor in the transmit shift register.
TIMEOUT: Receiver Time-out
0: There has not been a time-out since the last Start Time-out command (CR.STTTO), or RTOR.TO is zero.
1: There has been a time-out since the last Start Time-out command.
PARE: Parity Error
0: Either no parity error has been detected, or the parity bit is a zero in multidrop mode, since the last RSTSTA.
1: Either at least one parity error has been detected, or the parity bit is a one in multidrop mode, since the last RSTSTA.
FRAME: Framing Error
0: No stop bit has been found as low since the last RSTSTA.
1: At least one stop bit has been found as low since the last RSTSTA.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
CTS – – – CTSIC – – –
15 14 13 12 11 10 9 8
NACK RXBUFF ITER/UNRE TXEMPTY TIMEOUT
76543210
PARE FRAME OVRE RXBRK TXRDY RXRDY