cx82100 Conexant Systems, Inc., cx82100 Datasheet - Page 73

• Manufacturer Part Number: cx82100
• Description: Home Network Processor Hnp
• Manufacturer: Conexant Systems, Inc.

Figure 4-4. Indirect/Table Linked List Descriptor Example 2
101306C
DMAC_{x}_Ptr1= 0x001400F8
DMAC_{x}_Cnt1 = 0x01000009
0x001400FC
0x00140100
0x0014013C
0x00140140
0x001402FC
0x00140300
0x0014033C
0x00140340
0x001404FC
0x00140500
0x0014053C
0x00140540
0x001406FC
0x00140700
0x0014073C
0x00140840
0x001408FC
0x00140900
0x0014093C
0x00140940
0x001400F8
0x001402F8
0x001404F8
0x001406F8
0x001408F8
0x00140544
Address
Conexant Proprietary and Confidential Information
descriptor/status
descriptor/status
descriptor/status
descriptor/status
The use of the tail and the indirect/table linked list descriptor modes can be mixed to
form a more complicated list. The dynamic switch from one mode to the other is
controlled by the pre-programmed value in DMAC_{x}_LMode.
Figure 4-4 shows an example for mixing the two modes with five buffers.
data packet #1
data packet #2
data packet #3
data packet #4
data packet #4
0x001406F8
0x01000009
descriptor/
4 Bytes
64-byte
64-byte
64-byte
64-byte
64-byte
status
CX82100 Home Network Processor Data Sheet
0
8
0
8
0
8
0
8
0
8
DMAC_{x}_Ptr2= 0x00140800
DMAC_{x}_Cnt2 = 0x00000004
0x001402F 8
0x001404F 8
0x001408F 8
0x001400F 8
0x01000009
0x00000009
0x01000009
0x01000009
0x001 40804
0x001 4080C
0x001 40814
0x001 4081C
0x001 40800
0x001 40808
0x001 40810
0x001 40818
Address
101545_013
4-13