at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 272

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

24.4.3
Register Name:
Access Type:
• TXPTR: Transmit Counter Register
TXPTR must be set to transmit buffer address.
When a half duplex peripheral is connected to the PDC, RXPTR = TXPTR.
24.4.4
Register Name:
Access Type:
• TXCTR: Transmit Counter Register
TXCTR must be set to transmit buffer size.
When a half duplex peripheral is connected to the PDC, RXCTR = TXCTR.
0 = Stops peripheral data transfer to the transmitter
1- 65535 = Starts peripheral data transfer if corresponding channel is active
272
31
23
15
31
23
15
7
–
–
7
AT91SAM9G20 Preliminary
Transmit Pointer Register
Transmit Counter Register
30
22
14
30
22
14
PERIPH_TPR
Read-write
6
PERIPH_TCR
Read-write
–
–
6
29
21
13
29
21
13
5
–
–
5
28
20
12
28
20
12
4
–
–
4
TXCTR
TXCTR
TXPTR
TXPTR
TXPTR
TXPTR
27
19
11
27
19
11
3
–
–
3
26
18
10
26
18
10
2
–
–
2
25
17
25
17
9
1
–
–
9
1
6384B–ATARM–15-Dec-08
24
16
24
16
8
0
–
–
8
0