Brother HL-2400C Service Manual page 98

(4) ROM block
HL-2400C:
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:
• Appearance:
<Flash ROM>
• Model name:
• Access time:
• Appearance:
HL-2400Ce:
The ROM stores the CPU control program and font data. ROMs used are an
8Mbytes masked ROM, and an 8 Mbytes flash ROM which can be rewritten
on the board.
<Masked ROM>
• Access time:
• Appearance:
<Flash ROM>
• Model name:
• Access time:
• Appearance:
(5) DRAM block
HL-2400C:
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:
• Type:
• Access time:
• Appearance:
HL-2400Ce:
DRAMs are used for the receiving buffer and the working area of the CPU.
The DRAM block contains eight 64Mbit SDRAM, thus having 32MB memory
capacity in total.
• Model name:
• Type:
• Access time:
• Appearance:
less than 120nsec.
42-pin DIP
MBM29F800T-120 manufactured by Fujitsu
less than 120nsec.
48-pin TSOP
less than 120nsec. (page access: less than 50nsec)
44pin SOP
MBM29DL32BD-90 manufactured by Fujitsu
less than 90nsec.
48-pin TSOP
M5M41705CJ-6 manufactured Mitsubishi (or equivalent).
16Mbit EDO DRAM (4x4, 164,304bit)
less than 80nsec.
26-pin SOJ
HM5264805FTI manufactured by Hitachi (or equivalent).
64Mbit SDRAM
CL2 PC66 or higher
54pin TSOP
IV-50
PR2000036