Receiver Description
STEL-2176
32
User Manual
Bank 1, Group 3, Sub-Group 'C' Register Data Field Descriptions
I_test (Read/Write)
The I value used during test mode.
I_test (Read-Only)
Read register that permits looking at I value when the interleaver is running
during test.
J_test (Read/Write)
The J value used during test mode.
J_test (Read-Only)
Read register that permits looking at J value when the interleaver is running
during test.
Level2
There are two distinct operating modes of interleaving for Annex B. If Level2 is 1,
the depth of interleaving is variable and depends on a control word from Frame
Sync. If Level2 is 0 (level 1), interleaving is always 128 X 1; the control word does
not matter.
ShadowMode
There is 8 Kbytes of internal memory for the interleaver. In normal operation, the
interleaver first fills up its internal memory, then uses external memory. If
Shadow mode is 1, internal memory is bypassed.
SRAM_addr[15:0]
The address is used by the interleaver to access the SRAM. For Annex A, 256-
QAM requires external SRAM.
TestMode
The Interleaving type is set elsewhere by selecting QAM and Annex type. Setting
this register to 1, enables use of the I and J values stored in the I_test and J_test
Read/Write registers.
Bank 1, Group 3, Sub-Group 'D' - MPEG FrameSync Registers
Table 25. Group 3, Sub-Group 'D' Read/Write Registers
Address
7
6
5
4
3
2
1
0
4B
H
HIT
4C
H
MISS
4D
H
SyncSymbol
4E
H
Not used
OP_ERR
Table 26. Group 3, Sub-Group 'D' Read-Only Registers
Address
7
6
5
4
3
2
1
0
4F
H
Factory Use Only
50
H
Factory Use Only
51
H
Factory Use Only
52
H
Factory Use Only