Epson AcuLaser C1100 - 2.11 Principle of Electric Circuit Operation

EPSON AcuLaser C1100 Revision B
OPERATING PRINCIPLES Principle of Electric Circuit Operation 117
2.11 Principle of Electric Circuit Operation
2.11.1 Main Features
 Host-based controller using ESC/Page-S Printing System as its print language
 Engine specifications: A4, Color 5 ppm/Black-and-white 25 ppm, 600 dpi, Duplex
printing is available with the option
 NEC VR4305 CPU is employed
 HTC is employed as ASIC with memory, I/O, and an image processor
 Equipped with 32MB RAM, and can be expanded up to 256MB with optional
RAM
 Parallel (Compatibility/Nibble/ECP) and USB2.0 HS mounted as standard
interfaces
 This printer is available with or without Network I/F (100BaseTX/10BaseT) as
standard.
 Color image processing functions (CPGI, CRIT) mounted
 Contorl Panel with LCD
 Bus frequency 66.7 MHz
2.11.2 Outline Specifications
The following shows the outline specifications of the controller.
Table 2-2. List of Controller Outline Specifications
Item Description
Controller specifications Host-based controller
Engine specifications Type A4 4 cycles
Printing speed 5/25 ppm (Color/Monochrome)
CPU Specifications VR4305
ASIC Memory+I / O HTC
External devices PCC
(LCD, PicCnt, Network I/F Board, USB
compatible)
Clock CPU bus 66.7 MHz
Memory bus 66.7 MHz
PCC operation 66.7 MHz (CPUCLK division)
Clock wiring ASIC distribution
Video frequency 27.779 MHz
USB oscillator 12 MHz
UART 27.779 MHz (=video frequency)
SSCG Spread Down spread
Device CY25814SZCT
Reset 3.3V (M51957BFP-C61J)
EEPROM Capacity 128 Kbit
Device M95128-WMN6T (SPI)
ROM/RAM RAM capacity 32MB SDRAM (128Mbit*2)
ROM capacity 2MB FLASH
Mounting type ROM / RAM DIMM
OP slot 90 pin RAM_DIMM 1 slot
Max. RAM
capacity
256 MB
Host I/F Parallel Available
USB USB2.0 HS (external S1R72013)
Network Cobalt
Engine I / F UART