Analog Devices ADSP-SC58 Series Hardware Reference Manual page 3100

ADSP-SC58x PKTE Register Descriptions
Packet Engine Buffer Pointer Register
The
PKTE_BUF_PTR
packet engine. This register is used in direct host mode only.
Figure 44-6: PKTE_BUF_PTR Register Diagram
Table 44-32: PKTE_BUF_PTR Register Fields
Bit No.
(Access)
23:16 OUTBUF
(R/NW)
7:0 INBUF
(R/NW)
44–52
register contains the offset of the next buffer address (entry) to be read or written by the
15 14 13
0 0
INBUF (R)
Input Buffer Pointer
31 30 29
0 0
OUTBUF (R)
Output Buffer Pointer
Bit Name
Output Buffer Pointer.
The PKTE_BUF_PTR.OUTBUF bit field indicates the offset of the next address (en-
try) in the output buffer that will be written next by the packet engine. This bit field is
reset to zero after starting up and decremented by 4 at every output buffer write opera-
tion. Pointers wrap around; the maximum value this field can have equals the output
buffer size minus 4.
Input Buffer Pointer.
The PKTE_BUF_PTR.INBUF bit field indicates the offset of the next address (en-
try) in the input buffer that will be read next by the packet engine. The bit field is reset
to zero after starting up and incremented by 4 at every input buffer read operation.
Pointers wrap around; the maximum value this field can have equals the input buffer
size minus 4.
ADSP-SC58x/ADSP-2158x SHARC+ Processor Hardware Reference
12 11 10 9 8 7 6
0 0 0 0 0 0 0 0
28 27 26 25 24 23 22 21
0 0 0 0 0 0 0 0
Description/Enumeration
5 4 3 2 1 0
0 0 0 0 0 0
20 19 18 17 16
0 0 0 0 0 0