Nibble Mode - Epson Stylus PRO 7500 Service Manual

EPSON Stylus Pro 7500

NIBBLE MODE

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Data Transfer Format: IEEE-1284 Nibble Mode
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Synchronization System: Compatible with IEEE-1284 Specifications
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Handshake: Compatible with IEEE-1284 Specifications
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Logic level: TTL level (IEE-P1284 Level 1 device)
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Data transfer timing: Compatible with IEEE-1284 Specifications
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Expansion Request Data: If the expansion request data value is 00H or 04H,
the request is received. The meanings of these
values are as shown below.
00H: Request to carry out reverse channel transfers
04H: Request to return the ID of the device using
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Device ID: [00H] [47H]
MFG: EPSON
CMD: ESCPL2, BDC;
MDL:Stylus [SP] Pro [SP] 7500
CLS: PRINTER
DES: EPSON [SP] Stylus [SP] Pro [SP] 7500;
*: [SP] is code 20<H>.
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See the table below for the signal layout and signal names.
Product Description
in the Nibble mode.
the Nibble mode for reverse channel
transfers.
Interfaces
Revision A
26