M65727FP データシートの表示（PDF） - MITSUBISHI ELECTRIC

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M65727FP

MPEG2 MOTION ESTIMATION LSI

MITSUBISHI ELECTRIC  

DISTRIBUTION RESTRICTED. COPYRIGHT RESERVED 1995

2.2.3 Sync Signal Input Pins

SSYNC

MSYNC

ESYNC

DSYNC

OREQC

This is a sync signal for the DSWI port. It is asserted low. This signal must be

asserted when the leading data for DSWI is inputted

This is a sync signal for the DMBI port. It is asserted low. This signal must be

asserted when the leading data for DMBI is inputted

This is a sync signal for the block level pipeline. When this signal is asserted,

one execution cycle (550 / 806 cycles) is activated. It is asserted low.

This is a sync signal for the DCNT port. It must be asserted when dynamic

control signal is inputted. See DCNT for the content of the dynamic control

signal. This signal is asserted low.

This is used to request output. M65727 starts output from DOUT port after this

signal is asserted. This signal is asserted low.

2.2.4 Pins Specifying Operational Modes

MODE

HSIZE

VSIZE

EXTND

HLFPL

FMFMT

DCNT

This pin sets the mode of the M65727. The following four modes can be

specified.

00: Field mode, 01: Frame mode,

10: Field Dual-Prime mode, 11: Frame Dual-Prime mode

This pin specifies the horizontal search range. The following five types of range

can be specified.

000: ±7.5, 001: ±15.5, 010: ±31.5, 011: ±63.5, 100: ±127.5, 101~ 111: reserved

This pin specifies the vertical search range. The following two types of range

can be specified. 0: ±7.5, 1: ±15.5

This pin specifies the vertical search range expansion. When expansion modes

are selected, the vertical search range is set to ±8.0 / ±16.0. It is possible to

expand a vertical search range using multiple chips. Depending on modes, the

order of priority regarding the vectors with same distortions is different.

00: non-expansion, 01: reserved,

10: upper-range of expansion, 11: lower-range of expansion

This switches between half-pel precision search mode and integer-pel precision

search mode. 0: Integer-pel precision search, 1: half-pel precision search

Switches between the external memory (SW image) formats.

0: Field format, 1: Frame format

This is a dynamic control input. (Dynamic control means the control which

differs in each execution cycle.) The following is required.

Control of valid or invalid for search range (SKILL)

Leading pixel location of search window image in the vertical direction when the

dual-prime mode (DVSPO)

The central position of the search window image used for the dual-prime mode

(DCNTR)

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