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UF-E1

9

Printer

ROM
IC7

FRIP4 IC16

Binary Signal

Facsimile Coded Data

Modulated Signal

(6)

(5)

(4)

(2)

(1)

(3)

(2) Write
(3) Read
(4) Write
(5) Read
(6) Write

Document Memory
IC6 (FLASH)

(ECM) Buffer Memory

Working Area

Line Memory

IC13 (DRAM)

Asic

IC3

IC15

MODEM
CPU

CIS

IC2

MODEM
AFE

Printer

ROM
IC7

FRIP4 IC16

Binary Signal

Facsimile Coded Data

Modulated Signal

CIS

(4) Parallel Comm.

(3) DMA ch.0

(1) Read
(2) Write

Document Memory
IC6 (FLASH)

Working Area

Line Memory

IC13 (DRAM)

(2)

(1)

(3)

(4)

Asic

IC3

IC2

MODEM
AFE

CPU
IC15

MODEM

UF-E1

10

Check Point !!
Vdd

IC8

pin2

RESET IC

3.3V

nPONRST

IC8

pin1

RESET IC

0

  

3.3V

nSYSRST

IC3

pin149

Asic

0

3.3V

n_RESET

IC15

pin100

CPU

0

3.3V

CMCLK

IC3

pin147

Asic

Clock

CMCLK

IC15

pin103

CPU

Clock

n_CS3

IC15

pin38

CPU

Pulse

n_RD

IC15

pin29

CPU

Pulse

CPU OK!!
CA[0:23]

IC15

pin39-68 CPU

Pulse

CD[0:15]

IC15

pin10-26 CPU

Pulse

nCSGA

IC3

pin67

Asic

Pulse

nWRE

IC3

pin28

CPU

Pulse

nDOE

IC13

pin33

DRAM

Pulse

nDWE

IC13

pin17

DRAM

Pulse

nRAS

IC13

pin18

DRAM

Pulse

nUCAS

IC13

pin34

DRAM

Pulse

nLCAS

IC13

pin35

DRAM

Pulse

nCSFRIP

IC16

pin47

FRIP4-1

Pulse

PNLR/W

CN14 pin2

Pulse

PNLALE

CN14 pin3

Pulse

PNLDTE

CN14 pin4

Pulse

PNLD[0:3]

CN14 pin5-8

Pulse

nCSVROM

IC6

pin26

FROM

Pulse

Yes

No

nASFA

IC15

pin117

CPU

0V

24V

CN13 pin1-2

24V

5V

CN13 pin5

5V

nHRES

IC18

pin126

Houston

0

5V

nPWRON

IC18

pin11

Houston

0

5V

nPWRKEY

CN15 pin30

0

12V

nHRD

IC18

pin65

Houston

Pulse

nHROMS

IC18

pin64

Houston

Pulse

HAB[1:20]

IC18

pin31-55 Houston

Pulse

HDB[0:15]

IC18

pin66-85 Houston

Pulse

nHLCAS

IC18

pin63

Houston

Pulse

nHUCAS

IC18

pin62

Houston

Pulse

nHWR

IC18

pin61

Houston

Pulse

nHRAS

IC18

pin59

Houston

Pulse

HAEDID

CN15 pin4

Pulse

Yes

No

pCS

IC10

pin5

RTC

Pulse

Yes

No

SCLK

IC10

pin6

RTC

Clock

SIO

IC10

pin7

RTC

Pulse

Display Blink Request

Display Date & Time

12 - AUG 03:00

Reset Ink Drop Counter

Check RTC OK ?

***-** **:**

Display Error Code

Check New Cartridge

Ink Cartridge

Document

Recodeing Paper(Only:German)

Ink Jet Printer(GPB5)

I/O Port Initialize

Serial Port set

Asic Port Initialize

FROM Parity OK

FRIP4-1 Initialize

LCD Initialize

Initialize FROM

CHECK MECHANIZM

CPU Internal Initialize

START

CPU internal processing

Programmable Chip Select Control

Receive Cover

Work RAM(DRAM) Initialize

CPU Stack Pointer Set

CPI Internal Timer Set

UF-E1

11

Overview of the CPU

The CPU controls a 24-bits address bus and is used in making connection with other peripheral ICs and
interfaces through a 16-bits data bus.
IC15 differs from a typical CPU and has the following functions.

*Encode and Decode by Software.
*Operates as a 33600bps MODEM.
*Record and play back message as digital signal.
*Equipped with parallel interfaces compatible with 16550.
*Equipped with the synchronization or the asynchronous serial interface.
*Equipped with the automatic speed recognition serial interface.
*Equipped with two 16-bits serial interface for interfacing with AFE.

The CPU (IC15) controls the devices listed below.

*System ASIC

IC3

: Equipped with centronics I/F, printer I/F, serial I/F, motor con-

troller and the programmable I/O ports.

*FRIP4-1

IC16

: This IC controls scanning.

*Memory

: Refer to following table.

*RTC (Real Time Clock)

IC11

: Generates the clock/calendar data and these are backed up

by Backup Capacitor (C37)

MODEM CPU

MN195005

FAX ENGINE

Address Decode
Codec
Counter
AFE I/F
DPRAM I/F
JTAG I/F
Parallel I/F
Serial I/F
Programable I/O

IC15

Flash

ROM(Program)

16Mbit

IC7

Flash ROM(Data)

8Mbit

IC6

SRAM(Work)

1Mbit

IC4

DRAM(Work)

16Mbit

IC13

SYSTEM ASIC

DZAC000263

Chip Select
Motor Control
Oscillator
PWM
Centronics I/F
Printer I/F
Serial I/F
Programable I/O

IC3

FRIP4-1

MN860741

IC16

X1

RTC

IC10

X2

Data Bus

Address Bus

Control Bus

C37

UF-E1

12

Details of Memory usage for each model are as listed below.

You can check IC6 by TEST MODE 9 (Memory Test).
Caution!

After above test, compensation data for CIS is cleared.
Please refer to Test Mode 15 (CIS Training) in Service Manual.

This +3.3V system voltage is monitored by IC8 (the reset IC), and nRESET becomes high level when the
voltage of pin1 exceeds +2.5V.
Plugging the Power Cord or the +3.3V system voltage drops and reaches the 2.5V point, the hardware
reset (nRESO) operates and the function of the microprocessors are stopped.

The buzzer sound is produced by IC11 (Cross Point Mixer). IC11 is driven the BZCK signal and
modulation is applied while this signal is switched on and off to create the buzzer sound.

Memory

Type/Capacity

Memory usage

IC4

1Mb SRAM

CPU work memory (Coding table)

IC6

8Mb Flash ROM

Journal, Tel. No., RAM setting, OGM, ICM and Document Data,
CIS compensation data.
Kept data even if the power is switched off.

IC7

16Mb Flash ROM

System programs, Hold Sound, Coding Table

IC13

16Mb DRAM

CPU work memory (Line Memory)

Reset IC

IC8

+3.3V

2

3

SYSTEM

ASIC

IC3

nPONRST

IC15 CPU

IC16 FRIP4-1

1

150

149

100

44

nSYSRST

IC2,IC14 AFE

nAFERST

41

146

SYSTEM

ASIC

IC3

152

CPU
IC15

147

103

24.576MHz

X1

154

AFE

IC2,IC14

9

24.576MHz

CMCLK

FRIP4

IC16

VMCLK

6.144MHz

3

134

104

Clock(for Buzzer) 

1700Hz

(during Speaker On)

BZCK

*If you check these points
 Oscillation may stop.