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November 28th, 1995
The 512 KB DRAM contains the SAF memory, ECM buffer memory, and work
area. The SAF memory can be extended by 2 or 4 Mbytes with an IC card.
A 512 KB (4 Mbit) ROM is used for the system ROM.
For the USA and some Europe models, the software in this ROM can be re-
written from the IC card slot or by RDS (because a Flash ROM is used).
The IJC consists of the following components:
CPU - 16-bit CPU with 16-MHz external clock input
Printer Controller - Gate Array
RIDC - Raster Image Data Controller, interface between FCE and IJC
ROM - The inkjet printer control program and the bitmap font data
DRAM - Receive buffer, download buffer, and working area for printing
I/F Controller - Centronics Interface Controller
SRAM - Working area
HIC - Hybrid IC, Tx/Rx Amplifier
Thermistor - Detects the temperature in the printer
LED Driver - LED on/off control
EEPROM - Contains the following data:
Total amount of waste ink
Total number of pages that have passed through the printer
mechanism
OVERALL MACHINE INFORMATION
OVERALL MACHINE CONTROL
1-9
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