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R76-
OF5750/5950 Series January 2001
A3 - 1
A3.1 MCNT
A3.1.1
CPU
A3.1.1.1 Functions
A 32-bit RISC CPU is used as a core and it is provided with the following peripheral functions:
• Built-in PROM/Mask ROM
• Built-in RAM
• Bus state controller (DRAM control and chip select creation)
• Interrupt controller
• DMA controller
• 16-bit timer pulse unit
• Serial communication interface
(1) CPU’s throughput
The basic clock frequency is 20 MHz. A program/data is stored in the built-in ROM/RAM.
The rated throughput is 20 MIPS when optimum object code has been created. However,
the actual throughput is reduced due to the access times needed by external devices.
(2) Built-in PROM/Mask ROM
The built-in ROM size is 64 KB and memory addresses range from 000000h to 000FFFh.
(3) Built-in RAM
The built-in RAM size is 4 KB and memory addresses range from FFFF000h to
FFFFFFFh.
(4) Bus state controller
The bus state controller controls the DRAM and accesses the flash ROM and external
devices.
(Figure 6.1 shows the timing chart of the basic bus cycle.)
(5) Interrupt controller
This system has nine interrupts. Three interrupts /IRQ 4, /IRQ6, and /IRQ7 are used but
the other six interrupts /IRQ0 to /IRQ3, IRQ5, and NMI are not used.
Interrupts are allocated as follows:
/IRQ7 = Print-related user timer interrupt
/IRQ6 = Matsushita V.34 modem interrupts 1and 2, Sanyo V.17 modem, encryption, line
ringing tone (Ring), Sanyo read control IC
/IRQ4 = Centronics I/F controller interrupt, JBIG chip interrupt, MUPIS I/F, power I/F,
second tray I/F, user DMA channel 4/5 (Centronics), use DMA channel 6/7
(JBIG)
(6) DMA controller
Two channels of DMAs with external transfer request (DREQ) and acknowledge (DACK)
pins and two channels of DMAs without DREQ/DACK pins are incorporated.
DMA channel 0 (with DREQ/DACK): Used for transfer form read image processing LSI
chip to memory.
DMA channel 1 (with DREQ/DACK): Used for transfer from memory to IOGA print image
processor.
DMA channel 2 (without DREQ/DACK): Not used.
DMA channel 3 (without DREQ/DACK): Used to count main motor operating pulses.
Содержание OKIFAX 5950
Страница 9: ...CHAPTER 1 GENERAL INFORMATION ...
Страница 100: ...OF5750 5950 Series January 2001 1 91 NIC CONFIGURATION TYPE 2 09 22 2000 16 54 ID OKIDATA CORP E8S FAX MFP S W ...
Страница 101: ...OF5750 5950 Series January 2001 1 92 1 6 21 NIC Information ...
Страница 107: ...CHAPTER 2 INSTALLATION PROCEDURE ...
Страница 119: ...OF5750 5950 Series January 2001 2 12 Hang the document stacker onto hanging position 2 6 AC Cord Connection ...
Страница 264: ...CHAPTER 3 BRIEF TECHNICAL DESCRIPTION ...
Страница 272: ...CHAPTER 4 MECHANICAL DISASSEMBLY AND REASSEMBLY ...
Страница 277: ...OF5750 5950 Series January 2001 4 5 Appearance of the OKIFAX 5750 5950 ...
Страница 302: ...CHAPTER 5 ADJUSTMENTS ...
Страница 306: ...CHAPTER 6 CLEANING AND MAINTENANCE ...
Страница 341: ...CHAPTER 7 TROUBLESHOOTING AND REPAIR FOR OKIFAX 5750 5950 ...
Страница 400: ...Appendix A PC Board Descriptions and Operation ...
Страница 491: ...Appendix B DescriptionsofPrintOperation ...
Страница 513: ...Appendix C Not used at this time ...
Страница 514: ...Appendix D Mechanical Expanded View Drawing and Parts List OKIFAX 5750 5950 January 2001 Oki Data Corporation ...
Страница 516: ...OF5750 5950 Series January 2001 D 1 Section 1 CABINET ASSEMBLY 27 28 29 ...
Страница 518: ...OF5750 5950 Series January 2001 D 3 Section 2 CONTROL PANEL ASSEMBLY 11 ...
Страница 520: ...OF5750 5950 Series January 2001 D 5 Section 3 PRINTER ASSEMBLY 53 54 31 10 55 52 34 56 ...
Страница 523: ...OF5750 5950 Series January 2001 D 8 Section 4 BASE ASSEMBLY ...
Страница 525: ...OF5750 5950 Series January 2001 D 10 Section 5 FRAME ASSEMBLY SCANNER L 31 30 33 32 ...
Страница 527: ...OF5750 5950 Series January 2001 D 12 Section 6 FRAME ASSEMBLY SCANNER U ...
Страница 529: ...OF5750 5950 Series January 2001 D 14 Section 7 CABLES OPTION BOARDS ...
Страница 530: ...OF5750 5950 Series January 2001 D 15 28 29 Section 7 CABLES OPTION BOARDS ...
Страница 532: ...Appendix E Not used at this time ...
Страница 533: ...Appendix F Second Paper Feeder Maintenance Manual OKIFAX 5750 5950 series January 2001 Oki Data Corporation ...
Страница 550: ...OF5750 5950 Series January 2001 F 15 5 2 PCB Layout TQSB 2PCB PU FG CONTROLLER MOTOR DRIVER SEN2 MOTOR OSC SEN1 ...
Страница 551: ...OF5750 5950 Series January 2001 F 16 Figure 6 1 6 PARTS LIST SECTION1 CABINET CASSETTE ASSEMBLY P 7 2 8 1 6 5 3 4 O ...