IV-47
2.3.2 Circuit
(1) CPU block
•
Model name: MB86832-100 (SPARC lite), RISC CPU manufactured by
Fujitsu
•
Clock speed: 33.1776MHz (external) / 99.5328MHz (internal)
•
Cache memory: 8KB (Command cache) / 8KB (Data cache)
•
Appearance: 176-pin QFP
(2) ASIC block
•
Model name: MF87F1610 manufactured by Fujitsu
•
Appearance: 240-pin QFP
•
Functions:
∗
Controls CPU
∗
Controls memory
∗
Controls interrupts
∗
Timer
∗
External interfaces (Centronics, RS-232C, PCMCIA, MIO)
∗
Engine interface (Engine control, Video signal control)
∗
Supports Software
(3) ROM block
The ROM stores the CPU control program and font data. ROMs used are an
8Mbytes masked ROM, and a 2 Mbytes flash ROM which can be rewritten on
the board.
<Masked ROM>
•
Access time: less than 120nsec.
•
Appearance: 42-pin DIP
<Flash ROM>
•
Model name: MBM29F800T-120 manufactured Fujitsu
•
Access time: less than 120nsec.
•
Appearance: 48-pin TSOP
(4) DRAM block
DRAMs are used for the receiving buffer and the working area of the CPU.
The DRAM block contains eight 16Mbit EDO RAM, thus having 16MB
memory capacity in total.
•
Model name: M5M41705CJ-6 manufactured Mitsubishi (or equivalent).
•
Type: 16Mbit EDO DRAM (4x4, 164,304bit)
•
Access time: less than 80nsec.
•
Appearance: 26-pin SOJ
To Next Page
Loading...
