Fusion 878A
6.0 Control Register Definitions–Function 1
PCI Video Decoder
6.3 Local Registers (Memory Mapped)
100600B
Conexant
6-13
0x110—Audio Packet Lengths Register
0x114—RISC Program Start Address Register (RISC_STRT_ADD)
0x120—RISC Program Counter Register (RISC_COUNT)
Bits
Type
Default
Name
Description
[23:16]
RW
0x00
AFP_LEN
Number of audio lines in an audio field: max value 255.
[15:10]
—
—
—
Reserved
[11:0]
RW
0x000
ALP_LEN
Number of bytes in an audio line: max value 4095.
Bits
Type
Default
Name
Description
[31:0]
RW
0x00000000
RISC_IPC
Base address for the RISC program. Standard 32-bit memory space byte
address, although the software must DWORD-align by setting the lowest
2 bits to 00. The DMA controller begins executing pixel instructions at this
address when RISC_ENABLE is set. For example, the RISC program counter
is loaded with this pointer at the rising edge of RISC_ENABLE.
Bits
Type
Default
Name
Description
[31:0]
RO
—
RISC_PC
The current value of the RISC program counter. This may be slightly ahead of the
current instruction due to pre-fetching instructions into the queue.
Содержание Fusion 878A
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