BT848 ETC, BT848 Datasheet - Page 61

• Manufacturer Part Number: BT848
• Description: Single-Chip Video Capture for PCI
• Manufacturer: ETC

Bt848/848A/849A
Single-Chip Video Capture for PCI
Table 11. RISC Instructions (2 of 4)
Brooktree
WRITE1S23
WRITEC
Instruction
®
1011
0101
Opcode
DWORDs
3
1
Write pixels to memory in planar mode from the FIFO1 beginning at the speci-
fied target addresses. Skip pixels from FIFO2 and FIFO3. This instruction is
used to achieve the YUV9 and YUV12 color modes, where the chroma compo-
nents are sub-sampled.
DWORD0:
[11:0]
[15:12]
[23:16]
[24]
[25]
[26]
[27]
[31:28]
DWORD1:
[11:0]
[27:16]
DWORD2:
[31:0]
Write packed mode pixels to memory from the FIFO continuing from the cur-
rent target address.
DWORD0:
[11:0]
[15:12]
[23:16]
[24]
[25]
[26]
[27]
[31:28]
L848A_A
Byte Count #1
Byte Enables
Reset/Set RISC_STATUS
IRQ
Reserved
EOL
SOL
Opcode
Byte Count #2
Byte count #3
32-bit Target Address
Byte Count
Byte Enables
Reset/Set RISC_STATUS
IRQ
Reserved
EOL
SOL
Opcode
Description
Byte transfer count from FIFO1
Byte skip count from FIFO2
Byte skip count from FIFO3
Byte Address for Y data from FIFO1
Cannot be set
F
UNCTIONAL
DMA Controller
D
ESCRIPTION
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