Canon MultiPASS C5000 Service Manual page 211

Part 2: Printer
c) Bi-Centronics Interface (ECP mode)
If the host computer supports ECP mode, your MultiPASS unit transfers data in ECP
mode. If the host computer does not support ECP mode, your MultiPASS unit transfers
data in Compatibility mode and Nibhle mode. ECP mode must be set for some host
computers. ECP stands for Extended Compatibility Port. Data can be transferred at high
speed in ECP mode. In this mode, data can be transferred more quickly than in Nibble
mode because E-bit data lines are used bi-directionally without changing the mode.
Optionally, data can be compressed and transferred.
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