PRINCIPLES OF OPERATION
REV.-A
2.3.9 EEPROM CIRCUIT
The EEPROM can store the position of continuously fed paper, so that this information can be maintained
even if power goes off. Figure 2-70 shows the EEPROM circuit. Note that this is external to the CPU’s memory
space.
In order to write to the EEPROM, CPU port PA5 goes HIGH. Once the EEPROM has been selected, the
data to be sent is set in bank line B2, and is fed bit-by-bit to the EEPROM in line with rising pulses from
bank line B1’s clock. Data is read, bit-by-bit, in line with falling clock pulses. The EEPROM receives com-
mands to indicate whether to read or write data, and to indicate addresses.
B2 B1
CPU
µPD
7 8 1 0 H G
( 5 B )
PA5
PA6
Figure 2-70. EEPROM Circuit
2-64
LQ-510
Содержание AP-4000
Страница 1: ...LQ 510 AP 4000 T E C H N I C A L M A N U A L EPSON ...
Страница 4: ...REV A REVISION SHEET iv LQ 510 ...
Страница 11: ...GENERAL DESCRIPTION REV A Printer Cover A Printer Cover B Figure l l Exterior Views of the LQ 510 1 2 LQ 510 ...
Страница 103: ...REV A PRINCIPLES OF OPERATION LQ 510 Figure 2 68 A D Converter Circuit 2 61 ...
Страница 125: ...OPTIONAL EQUIPMENT REV A 3 16 Figure 3 12 Lubrication Points 2 LQ 510 ...
Страница 167: ......
Страница 192: ...MAINTENANCE REV A L __ w w n Figure 6 3 LQ 510 Lubrication Points 6 3 LQ 510 ...
Страница 202: ...APPENDIX REV A Table A 6 E01A05 Pin Functions A 8 LQ 510 ...
Страница 207: ...REV A APPENDIX CEJ S K D I D O Figure A 14 Timing Chart Read Figure A 15 Timing Chart Write LQ 510 A 13 ...
Страница 212: ...3 L CN 1 ...
Страница 213: ...REV A APPENDIX Figure A 25 SANPSE Board Component Layout LQ 510 A 19 ...
Страница 214: ...REV A APPENDIX J Figure A 26 SANPSE Board Circuit Diagram A 20 LQ 510 ...
Страница 215: ...REV A APPENDIX Figure A 27 SANPNL W Board Circuit Diagram LQ 510 A 21 ...
Страница 216: ... w 3 0 4 CN1 14 18 22 I IP I9 3 1 2LSl39 2 6 8 2 4 9 TOM4 BOARD Y 4 5 4 2 0 9 0 0 0 0 0 ...
Страница 220: ...h i ...
Страница 221: ...REV A APPENDIX 506 Figure 14 32 Model 5710 Printer Mechanism Exploded Diagram A 29 ...
Страница 222: ...APPENDIX REV A Figure A 33 C80006 Pull Tractor Exploded Diagram A 30 LQ 510 ...
Страница 223: ... Y ...
Страница 224: ...APPENDIX REV Figure A 35 LQ 510 Printer Cover A Case Outline Drawing A 32 LQ 510 ...
Страница 225: ...APPENDIX REV A J 2 7 J Bl Figure A 36 LQ 510 Printer Cover B Case Outline Drawing LQ 510 A 33 ...
