5 receive next pointer register, 6 receive next counter register – Rainbow Electronics AT91CAP9S250A User Manual
Page 344
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344
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
27.4.5
Receive Next Pointer Register
Register Name:
PERIPH_RNPR
Access Type:
Read/Write
• RXNPTR: Receive Next Pointer
RXNPTR contains next receive buffer address.
When a half duplex peripheral is connected to the PDC, RXNPTR = TXNPTR.
27.4.6
Receive Next Counter Register
Register Name:
PERIPH_RNCR
Access Type:
Read/Write
• RXNCTR: Receive Next Counter
RXNCTR contains next receive buffer size.
When a half duplex peripheral is connected to the PDC, RXNCTR = TXNCTR.
31
30
29
28
27
26
25
24
RXNPTR
23
22
21
20
19
18
17
16
RXNPTR
15
14
13
12
11
10
9
8
RXNPTR
7
6
5
4
3
2
1
0
RXNPTR
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
RXNCTR
7
6
5
4
3
2
1
0
RXNCTR
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