READ command sequences and phase progression

This scanner initially has image buffer memory different from former Fujitsu image scanner M3096G/M3097G.

Notations :

ARB: ARBITRATION phase

SEL: SELECTION phase

CMD: COMMAND phase

DI: DATA IN phase

MI: MESSAGE IN phase

MO: MESSAGE OUT phase

STS: STATUS phase

BF: BUS FREE

Init: Initiator (Host Computer)

Targ: Target (Image Scanner)

Variables for explanation

TL:

Requested Transfer Length size. [bytes]

WD:

Window Data size defined by SET WINDOW

 

command. [bytes]

 

If compression is specified, the size is compressed data.

VD:

Scanned image data size in scanner memory [bytes]

 

This value is varied on scanning progression.

M:Transferred data size [bytes]

N:N = (VD div 65536). [bytes]

TD:

Total Data that is transferred. [bytes]

When TL ≥ WD at first READ command, it is called ‘Single READ’ sequence. This scanner has default page buffer memory, therefore, the Single READ is completely subset of Multiple READ. This document has omitted Single READ sequence.

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M3099GX/GH OEM Manual