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AT91SAM9G20_14 Datasheet, PDF (279/832 Pages) ATMEL Corporation – Incorporates the ARM926EJ-S ARM Thumb Processor | |||
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AT91SAM9G20
24.4.9 Transfer Control Register
Register Name:
PERIPH_PTCR
Access Type:
Write-only
31
30
29
28
27
26
25
24
â
â
â
â
â
â
â
â
23
22
21
20
19
18
17
16
â
â
â
â
â
â
â
â
15
14
13
12
11
10
9
8
â
â
â
â
â
â
TXTDIS
TXTEN
7
6
5
4
3
2
1
0
â
â
â
â
â
â
RXTDIS
RXTEN
⢠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.
6384EâATARMâ05-Feb-10
279
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