Epson Stylus Photo RX700 - Main Board Circuit Configuration (Printer and Common Section)

EPSON Stylus Photo RX700 Revision A
Operating Principles Operating Principles of Electric Circuitry 45
2.3.3.4 Main Board Circuit Configuration (Printer and Common
Section)
IC Location Functions
SOC in CPU core IC12
 Name: E01A56B*: by NEC (CPU: NA85E2S)
Built-in iLB RAM 32 Kbyte, Built-in dLB RAM 16 Kbyte
Built-in iCACHE 8 Kbyte, Built-in dCACHE 8 Kbyte
 Operating frequency:
CPU core 192 MHz (SSCG)
NPB macro (UART, Timer C/D, prescaler) 48 MHz
User logic (Scanner / Printon) 48 MHz (SSCG)
User logic (Printer) 48 MHz
Local SDRAM 96 MHz (SSCG)
External bus clock 64 MHz (SSCG)
FLASH ROM
(64Mbit)
IC2
 Name: MBM29PL64LM (Fujitsu) or the equivalent
 Application: Program
 Type: Flash memory chip powered by +3.3 V only, the data on which
can be erased totally or partially in sectors
 Capacity: 64 Mbit(R4CD120)
 Package: 48 Pin TSOP
 Bus width: 16 bits
FLASH ROM
(32Mbit)
IC1
 Name : MBM29PL32TM/BM (Fujitsu) or the equivalent
 Application : Data / program
 Type : Flash memory chip powered by +3.3 V only, the data on which
can be erased totally or partially in sectors
 Capacity : 32Mbit
 Package : 48 Pin TSOP
 Bus width : 16 bits
SDRAM
(CPU bus)
IC11
 NameK4S561632*(SAMSUNG) or the equivalent
 Application : System memory
 Type : 4 M Words x16 bits x 4-bank SDRAM
 Bus width : 16 bits
 Power supply : 3.3 V single power supply
 Capacity : 256 Mbit(4Mx16bitx4bank)
 Package : 54 pin TSOP
 Operating frequency : 133 MHz (CL =2) or higher
SDRAM for
image processing
(256-Mbit chip
and 128-Mbit
chip)
IC13
(256)
IC14
(128)
 Name: K4S561632*(SAMSUNG) or the equivalent (256 Mbits)
K4S281632*(SAMSUNG) or the equivalent (128 Mbits)
 Application : Work memory for copy function
 Bus width : 16 bits
 Power supply : 3.3 V single power supply
 Capacity: 256 Mbit (4 M x 16 bits x 4 banks) (256 Mbits)
128 Mbit (2 M x 16 bits x 4 banks) (128 Mbits)
 Package : 54-pin TSOP
 Operating frequency : 133 MHz (CL =2) or higher
RTC circuit IC3
 RTC9824: by Seiko Epson
Composite IC for reset function, RTC and EEPROM
CR/PF/Pump
motor drive
circuit
IC7
 Sleep mode is entered for power-saving.
 Drive voltage : 42 V
±5%
 Drive IC: M63160J (RENESAS)
 CR motor
Drive system : DC motor control
Control method: PID feedback method
Current detection resistance: 0.36Ω
±1% 1 Ω
 PF Motor
Drive system : DC motor control
Control method: PID feedback method
Current detection resistance: 0.36Ω
±1% 1 Ω
 Pump motor
Excitation method: 2-2 phase / 1-2 phase / 4W1-2 phase
Drive system : Bipolar driving
Current detection resistance: 0.36Ω
±1% 1Ω
APG/Pressure/
ASF motor drive
circuit
IC8
 Sleep mode is entered for power-saving.
 Drive voltage : 42V
±5%
 Drive IC: M63160J (RENESAS)
 APG motor
Drive system : DC motor control
Control method: PID feedback method
Current detection resistance: 0.36Ω
±1% 1 Ω
 Pressure motor
Drive system : DC motor control
 Control method: PID feedback method
 Current detection resistance: 0.36Ω
±1% 1 Ω
 ASF Motor
Excitation method: 2-2 phase / 1-2 phase / W1-2 phase / 2W1-2 phase /
4W1-2 phase
 Drive system : Bipolar driving
 Current detection resistance: 0.36Ω
±1% 1Ω
DAC circuit for
motor driver Vref
IC6
 Name : M62384FP (Mitsubishi)
 Application : Vref generation for motor driver ICs
Head drive
circuit
IC5
 Drive voltage : 42 V±5%, VH is supplied to the head drive and control
circuit.
Head drive control through the control port of SOC.
 Head drive control IC: E09A54RA (Sony)
IC Location Functions