Manual

345
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
27.4.7 Transmit Next Pointer Register
Register Name: PERIPH_TNPR
Access Type: Read/Write
• TXNPTR: Transmit Next Pointer
TXNPTR contains next transmit buffer address.
When a half duplex peripheral is connected to the PDC, RXNPTR = TXNPTR.
27.4.8 Transmit Next Counter Register
Register Name: PERIPH_TNCR
Access Type: Read/Write
• TXNCTR: Transmit Counter Next
TXNCTR contains next transmit buffer size.
When a half duplex peripheral is connected to the PDC, RXNCTR = TXNCTR.
31 30 29 28 27 26 25 24
TXNPTR
23 22 21 20 19 18 17 16
TXNPTR
15 14 13 12 11 10 9 8
TXNPTR
76543210
TXNPTR
31 30 29 28 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
TXNCTR
76543210
TXNCTR