Datasheet

523
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
27.6.9 Transfer Control Register
Name: PERIPH_PTCR
Access: Write-only
 RXTEN: Receiver Transfer Enable
0: No effect.
1: Enables PDC receiver channel requests if RXTDIS is not set.
When a half-duplex peripheral is connected to the PDC, enabling the receiver channel requests automatically disables the
transmitter channel requests. It is forbidden to set both TXTEN and RXTEN for a half-duplex peripheral.
 RXTDIS: Receiver Transfer Disable
0: No effect.
1: Disables the PDC receiver channel requests.
When a half-duplex peripheral is connected to the PDC, disabling the receiver channel requests also disables the transmit-
ter channel requests.
 TXTEN: Transmitter Transfer Enable
0: No effect.
1: Enables the PDC transmitter channel requests.
When a half-duplex peripheral is connected to the PDC, it enables the transmitter channel requests only if RXTEN is not
set. It is forbidden to set both TXTEN and RXTEN for a half-duplex peripheral.
 TXTDIS: Transmitter Transfer Disable
0: No effect.
1: Disables the PDC transmitter channel requests.
When a half-duplex peripheral is connected to the PDC, disabling the transmitter channel requests disables the receiver
channel requests.
31 3 02928 27 26 25 24
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23 22 21 20 19 18 17 16
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15 14 13 12 11 10 9 8
––––––TXTDIS TXTEN
76543 210
––––––RXTDIS RXTEN