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M3099GX/GH OEM Manual 3-81
INTERFACE
Data Type Codes: 00h(Image), 80h(Pixel Size),
81h(Detected Paper Information)
The transfer data type distinguishes between the different types of
data which may be transferred between the initiator and the target.
The types of transfers are specified in Table 3.61. Data Type Code
and Data Type Qualifier are commonly used with SEND command.
Table 3.61 Data Type Codes
Code
00h
01h
02h
03h
04h - 7Fh
80h - FFh
80h
81h
others
Description
Image
Vendor Specific
Halftone Mask
Gamma Function
Reserved
Vendor specific
Pixel Size
Detected Paper Information
Reserved
Command
READ
SEND
SEND
READ
READ
Data Type Qualifier:
The data type qualifier field provides a means to differentiate data
transfers of the same data type code. The values used in this field are
vendor specific. This scanner uses this field for Image Data as
follows.
Byte 4: Reserved
Byte 5: Window Identifier
Strictly speaking, SCAN command is used to specify Window
Identifier but we used this field SCAN command can be omitted
from scanning sequence.
For the other data type code, data type qualifier field is reserved.
#03.pm5 98.2.22, 1:33 PM81