Rx_d buffer descriptor pointer offset register, Transmit buffer descriptor pointer offset register – Digi NS9215 User Manual
Page 325
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E T H E R N E T C O M M U N I C A T I O N M O D U L E
RX_D Buffer Descriptor Pointer Offset register
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325
Register bit
assignment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R X _ D B u f f e r D e s c r i p t o r P o i n t e r O f f s e t r e g i s t e r
Address: A060 0A34
Register
Register bit
assignment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T r a n s m i t B u f f e r D e s c r i p t o r P o i n t e r O f f s e t r e g i s t e r
Address: A060 0A38
Bits
Access
Mnemonic
Reset
Description
D31:11
N/A
Reserved
N/A
N/A
D10:00
R
RXCOFF
0x000
Contains an 11-bit byte offset from the start of the pool C
ring. The offset is updated at the end of the RX packet,
and will have the offset to the next buffer descriptor that
will be used. RXCOFF can be used to determine where
the
RX_RD
logic will put the next packet.
Reserved
RXDOFF
13
12
11
10
9
8
7
6
5
4
3
2
1
0
15
14
31
29
28
27
26
25
24
23
22
21
20
19
18
17
16
30
Reserved
Bits
Access
Mnemonic
Reset
Description
D31:11
N/A
Reserved
N/A
N/A
D10:00
R
RXDOFF
0x000
Contains an 11-bit byte offset from the start of the pool D
ring. The offset is updated at the end of the RX packet,
and will have the offset to the next buffer descriptor that
will be used. RXDOFF can be used to determine where
the
RX_RD
logic will put the next packet.