Circuit - Brother HL-2600CN Service Manual

2.3.2

Circuit

(1) CPU block
x Model name:
x Clock speed:
x Cache memory: 32KB (Command cache) / 32KB (Data cache)
x Bus width:
x Appearance:
(2) ASIC block
x Model name:
x Appearance:
x Functions:
(3) Gate Array block
x Model name:
x Appearance:
x Functions:
(4) ROM block
The ROM stores the CPU control program and font data. ROMs used are an
16Mbytes masked ROM, and an 8 Mbytes flash ROM which can be rewritten
on the board.
<Masked ROM>
x Access time:
x Appearance:
<Flash ROM>
x Model name:
x Access time:
x Appearance:
TMPR4955AF-266,
MIPS 64bit RISC CPU manufactured by TOSHIBA
66.7MHz (external) / 266MHz (internal)
32bit (external) / 64bit (internal)
Internal Floating Point Unit (FPU)
160-pin QFP
MF87F4561 manufactured by Fujitsu
420pin BGA
Controls CPU
Controls memory
Controls interrupts
Timer
External interfaces (Centronics, BR-NET, IDE, Compact Flash, USB)
Engine interface (Video signal control)
Supports Software
SLAC099HF1A manufactured by Epson
160pin QFP
Engine control
less than 100nsec. (page access: less than 30nsec)
48pin TSOP
MBM29DL32BD-90 manufactured by Fujitsu
less than 90nsec.
48-pin TSOP
IV-44