at91rm3400 ATMEL Corporation, at91rm3400 Datasheet - Page 338
at91rm3400
Manufacturer Part Number
at91rm3400
Description
Atmel Advanced At91 Arm Microcontroller
Manufacturer
ATMEL Corporation
Datasheet
1.AT91RM3400.pdf
(461 pages)
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SSC Status Register
Register Name:
Access Type:
• TXRDY: Transmit Ready
0: Data has been loaded in SSC_THR and is waiting to be loaded in the Transmit Shift Register.
1: SSC_THR is empty.
• TXEMPTY: Transmit Empty
0: Data remains in SSC_THR or is currently transmitted from Transmit Shift Register.
1: Last data written in SSC_THR has been loaded in Transmit Shift Register and transmitted by it.
• ENDTX: End of Transmission
0: The register SSC_TCR has not reached 0 since the last write in SSC_TCR or SSC_TNCR.
1: The register SSC_TCR has reached 0 since the last write in SSC_TCR or SSC_TNCR.
• TXBUFE: Transmit Buffer Empty
0: SSC_TCR or SSC_TNCR have a value other than 0.
1: Both SSC_TCR and SSC_TNCR have a value of 0.
• RXRDY: Receive Ready
0: SSC_RHR is empty.
1: Data has been received and loaded in SSC_RHR.
• OVRUN: Receive Overrun
0: No data has been loaded in SSC_RHR while previous data has not been read since the last read of the Status Register.
1: Data has been loaded in SSC_RHR while previous data has not yet been read since the last read of the Status Register.
• ENDRX: End of Reception
0: Data is written on the Receive Counter Register or Receive Next Counter Register.
1: End of PDC transfer when Receive Counter Register has arrived at zero.
• RXBUFF: Receive Buffer Full
0: SSC_RCR or SSC_RNCR have a value other than 0.
1: Both SSC_RCR and SSC_RNCR have a value of 0.
• TXSYN: Transmit Sync
0: A Tx Sync has not occurred since the last read of the Status Register.
1: A Tx Sync has occurred since the last read of the Status Register.
• RXSYN: Receive Sync
0: A Rx Sync has not occurred since the last read of the Status Register.
1: A Rx Sync has occurred since the last read of the Status Register.
338
RXBUFF
31
23
15
–
–
–
7
AT91RM3400
ENDRX
30
22
14
SSC_SR
Read-only
–
–
–
6
OVRUN
29
21
13
–
–
–
5
RXRDY
28
20
12
–
–
–
4
TXBUFE
RXSYN
27
19
11
–
–
3
ENDTX
TXSYN
26
18
10
–
–
2
TXEMPTY
RXEN
25
17
–
9
–
1
1790A–ATARM–11/03
TXRDY
TXEN
24
16
–
8
–
0
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