![background image](http://html.mh-extra.com/html/canon/canoscan-fb-630p/canoscan-fb-630p_service-manual_62780066.webp)
CHAPTER 2
2 - 38
COPYRIGHT © 1999 CANON INC. CANOSCAN FB330/FB630 SERIES REV.0 OCT. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Host computer
Scanner
Printer
IV. CONTROL SYSTEM
A. CanoScan FB330P/FB630P
1. Outline
CanoScan FB330P/FB630P control system consists of the CPU and gate array. The CPU
has 7 digital ports. P0, P2, P3, P6, and P7 are for generating control signals in the main PCB.
P4 is for address bus and data bus (AD-AD7) and P5 is for address bus (A8-A15). P7 is mainly
for inputting a function check mode setting.
Figure 2-29
2. Control Switching Between Printer And Scanner
CanoScan FB330P/FB630P has two parallel ports which allow to connect in order of the
host computer, scanner and printer as shown in Figure 2-30. When the host computer sends
the signal to start the communication with the scanner, the control is switched between printer
and scanner.
Figure 2-30
The host computer sends the command to select the scanner or the printer to communicate
with.
Gate Array
P0, P2, P3,
P6, P7
AD0~7
A8~15
CPU
P4
P5
To host computer
Control signal
Содержание CanoScan FB 630P
Страница 4: ......
Страница 6: ......
Страница 10: ......
Страница 12: ......
Страница 26: ......
Страница 28: ......
Страница 72: ......
Страница 74: ......
Страница 92: ......
Страница 94: ......
Страница 96: ......
Страница 98: ......
Страница 122: ......
Страница 128: ...6 6 COPYRIGHT 1999 CANON INC CANOSCAN FB330 FB630 SERIES REV 0 OCT 1999 PRINTED IN JAPAN IMPRIME AU JAPON ...
Страница 136: ......
Страница 138: ......