Canon BJC-4300 Series Service Manual download pdf (Page 84)

Part 4: Technical Reference

BJC-4300

2.1

Compatible mode

The

parallel interface for the compatible mode transfers data in S-bit units. Data is

___-

transferred with the STROBE, BUSY, and ACKNLG handshake signals.

When the printer receives the data (Data 1-8) and STROBE signal from the host

computer and the STROBE signal is low, the printer controller (which controls the

parallel interface) outputs the BUSY signal and latches the data. After the BUSY

signal is output, the printer controller sends the latched data from the DRAM bus to

the receive buffer in the DRAM. After the data is completely written into the receive

buffer in the

DRAM,

the printer controller outputs the ACKNLG signal and sets the

BUSY signal to “Low.” Then it watts for the next data input from the host computer.

Mode

asps

.op

o.!$s

Min. Min. Min.

BJ Mode

0.5p

.ops

osws

Min. Min. Min.

Approx.

6~s

Figure 4-7 Interface Timing (Compatible Mode)

1 2 ... 79 80 81 82 83 84 85 86 87 88 89 ... 154 155

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Canon BJC-4300 Series Service Manual Page 84