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EPSON Stylus PHOTO RX600/610, RX620/630 Revision C
Operating Principles Electric Circuit 18
2.3.1 C543 Main Circuit Board
2.3.1.1 Feature
USB 2.0 with multi-end points allows high speed SPC without HUB
SOC with printer control, scanner control, PT control, CPU SuperMacro
1CPU (NA85E2C by NEC) controls printer, scanner and PT unit
256Mbit*16 SDRAM (2 units)
A6615 drives DC x 2 and DC x 2 with 1Chip to motor driver
SOC obtains wider band ranges by setting action frequency of local SDRAM
to 96MHz
Copy function allows faster process with SOC to scan, and to generate 2-
values, microwave, image buffer instead of going through CPU bus.
Equipped with a color LCD (2.5-inch DTFD liquid crystal display) as
standard.
Low current allows LCD to reduce power consumption in low power mode as
follows:
• Lowering power supply voltage
• Shutting off optical current for optical sensor
• SLEEP mode for motor drive
• Saving the power for printer with no exciting motor
• Saving the power for scanner by turning off the lamp
• Equipped with printer tray open sensor
Table 2-4.
Main Element location Function
Built-in CPU core
SOC
(E01A49B*)
IC6
• Built-in NA85E2C core
• Built-in iLB RAM 12Kbyte, Built-in dLB RAM 4Kbyte
Built-in iCACHE 8Kbyte, Built-in dCACHE 8Kbyte
• Action frequency
CPU core :192MHz(SSCG)
NPB macro (UART, TimerC/D, Prescaler) :48MHz
User logic (scanner/photo print) :48MHz (SSCG)
User logic (printer) :48MHz
Local SDRAM :96MHz(SSCG)
External bus clock :64MHz(SSCG)
• Power supply voltage : internal 1.5 V, external 3.3 V
FLASH ROM
(MBM29PL64LM)
IC2
•Firmware
• 64MB, 16bit bus, 48pin, 3.3V drive
SDRAM
(K4S561632)
• System Memory (for CPU)
• 256 Mbit, 16 bit bus, 54pin, 133MHz (CL=2) minimum
SDRAM
(K4S561632)
• Work memory for copy function (image processing)
• 256 Mbit, 16 bit bus, 54pin, 133MHz (CL=2) minimum
Card ASIC
(E09A49B*)
IC14
• Bus clock : 64MHz , internal clock : 48MHz
• 3.3V Single power supply
CF Socket Power
Controller
(TPS2041A)
IC15
• 8 pin PSOP
• Power control 1CH with current limit
RTC circuit
(RTC9822)
IC1
Multiple IC
• EEPROM ( Default value, store various parameters)
• RESET
•TIMER
Motor drive circuit
(A6615)
IC12
• CR motor, PF motor, scanner motor drive circuit
• Drive motor: 42V ±5%
Head drive circuit
(E09A41RA)
IC11
• Head drive control (control port for SOC)