II-9
1.3.2
ASIC
The ASIC is composed of a Cell Based IC that contains the following functional blocks.
(1)
Oscillator circuit
Generates the main clock for the CPU by dividing the source clock frequency into
two.
(2)
Address decoder
Generates the CS for each device.
(3)
DRAM control
Generates the RAS, CAS, WE, OE and MA signals for the DRAM and controls
refresh processing (CAS before RAS self-refreshing method).
(4)
Interrupt control
Interrupt levels:
Priority
High
7
NMI
6
FIFO
5
EXINT(Option Serial I/O)
4
BD / Timer 1
3
SCANINT
2
CDCC / BOISE / DATA EXTENSION
Low
1
Timer 2
(5)
Timers
The following timers are incorporated:
Timer 1
16-bit timer
Timer 2
10-bit timer
Timer 3
Watch-dog timer
(6)
FIFO
A 5,120-bit FIFO is incorporated. Data for one raster scan is transferred from the
RAM to the FIFO by DMA transmission and is output as serial video data. The
data cycle is 10.22 MHz.
(7)
CDCC parallel I/O
<Data receiving>
There are two modes in this unit. One is the CPU receiving mode and the other is
the DMA receiving mode. In the CPU receiving mode the CPU receives the
command data from the PC, and after the CPU is switched to the DMA mode, it
receives the image data and writes to the DRAM directly.
HL-820/1020/1040
Содержание HL-1020
Страница 1: ......
Страница 36: ...II 20 Fig 2 22 shows the CDCC interface circuit Fig 2 22 HL 1050 ...
Страница 37: ...II 21 1 3 10 Engine I O Fig 2 23 shows the engine interface circuit Fig 2 23 HL 820 1020 1040 ...
Страница 38: ...II 22 Fig 2 24 shows the engine interface circuit Fig 2 24 HL 1050 ...
Страница 67: ...III 18 4 PACKING Fig 3 32 Documents Accessory carton Pad Pad Printer Bag Carton ...
Страница 87: ...IV 20 3 4 Location of Feed Roller Shaft and Grounding Contacts Fig 4 7 Feed shaft roller For feed roller ...
Страница 101: ...CODE UK4007000 B48K312CIR NAME V 5 Appendix 5 Main PCB Circuit Diagram HL 820 1020 1040 1 2 ...
Страница 102: ...Appendix 6 Main PCB Circuit Diagram HL 820 1020 1040 2 2 CODE UK4007000 B48K312CIR NAME A 6 ...
Страница 103: ...Appendix 7 Main PCB Circuit Diagram HL 1050 1 5 CODE UK4041000 B512001CIR NAME A 7 ...
Страница 104: ...Appendix 8 Main PCB Circuit Diagram HL 1050 2 5 CODE UK4041000 B512001CIR NAME A 8 ...
Страница 105: ...Appendix 9 Main PCB Circuit Diagram HL 1050 3 5 CODE UK4041000 B512001CIR NAME A 9 ...
Страница 106: ...Appendix 10 Main PCB Circuit Diagram HL 1050 4 5 CODE UK4041000 B512001CIR NAME A 10 ...
Страница 107: ...Appendix 11 Main PCB Circuit Diagram HL 1050 5 5 CODE UK4041000 B512001CIR NAME A 11 ...
Страница 108: ...Appendix 12 Panel Sensor PCB Circuit Diagram CODE UK4010000 B48K303CIR NAME A 12 ...
Страница 117: ...Apr 98 84U005BE0 PARTS REFERENCE LIST MODEL HL 820 1020 1040 1050 R LASER PRINTER ...
Страница 122: ...1 1 1 MODEL HL 1050 84U 861 101 103 104 84U 862 106 6 4 5 MAIN PCB HL 1050 OTHERS ISRAEL 3 ...
Страница 133: ...R Lower Tray Unit for HL 2400C Color Laser Printer PARTS REFERENCE LIST MODEL LT 24CL Feb 1999 54S003BE0 ...
Страница 135: ...CONTENTS LOWER TRAY UNIT List 1 Drawing 2 ...
Страница 137: ... 2 GENERAL DRAWING MODEL LT 24CL 54S X06 4 3 1 6 5 2 7 ...
Страница 138: ...R Lower Tray Unit for HL 2400C Color Laser Printer SERVICE MANUAL MODEL LT 24CL Feb 1999 54S004BE0 ...
Страница 214: ......
Страница 296: ...USER S GUIDE A 12 HP LaserJet IIP 6P EPSON FX 850 IBM Propritner XL EPSON FX 850 ...