Datasheet

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SAM9M10 [DATASHEET]
6355F–ATARM–12-Mar-13
46.6.4 Decoder Control Register 0 (Decoder Mode and Picture Type)
Name: VDEC_CTLR0
Address: 0x0090000C
Access: Read-write
• HLOCK: HLOCK Enable
0: locked transfers disabled.
1: locked transfers enabled.
When a locked transfer is granted, bus grant cannot be lost even if a higher priority master requests the bus.
• REFFIRST: Reference Field First
Indicates which FWD reference field has been decoded first.
0: FWD reference bottom field.
1: FWD reference top field.
•MV: MPEG-2 Motion Vector Write Enable
Direct mode motion vector write enable / MPEG2 motion vector write enable for error concealment purposes:
0: Writing disabled for current picture.
1: The direct mode motion vectors are written to external memory starting from MV_BASE in Direct mode motion vector
write/read base address register (offset 0x00a8).
• QUANT: Quantization
0: Quantization parameter can vary inside picture.
1: Quantization parameter is fixed (pquant).
• FILTDIS: De-block Filtering Disable
0: Filtering is enabled for current picture.
1: Filtering is disabled for current picture.
• OUTDIS: Disable Decoder Output Picture Writing
0: Decoder output picture is written to external memory.
1: Decoder output picture is not written to external memory.
• REFFIELD: Indicates Which Field Should Be Used As Reference
Used only if REF_FRAMES =’0’ in Decoder control register 1 (picture parameters).
0: Bottom field
31 30 29 28 27 26 25 24
DEC_MODE RLCEN – – –
23 22 21 20 19 18 17 16
PICMODE PICSTRUCT PICBEN PICTYPE PICFIELD FORWMODE – REFFIELD
15 14 13 12 11 10 9 8
OUTDIS FILTDIS QUANT MV REFFIRST – – HLOCK
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