Read Sharp AR-M550 (serv.man22) Service Manual online
AR-555/550/620/625 BLOCK DIAGRAM /
ブロック図
2 - 3
SDRAM Block (Standard & Option)
SDRAM
IC4,5,6,7
(ON BOARD)
MD[63:0]
MAA[12:0]
DIMM Slot
CN3
(64,128,256
MB)
SDA,SCL
SDQMA[7:0]
MWE
MCS0
MRASA
MCASA
BSEL0A,1A
CKEA
MWE
MCS1A,2A
MRASA
MCASA
BSEL0A,1A
CKEA
DRCLK
MEMCLK0
MEMCLK1,2,3,4
ROM Block (Flash & Mask)
LA[22:2]
LCX245
IC727,
728,730,731
MEMD[31:
0
]
SysAD[31:0]
SysAD[54:34]
3.3V
VCCW
CODECS0*
CODECS1*
CODECS2*
CODECS3*
FONTCS0*
FONTCS1*
FONTCS2*
FONTCS3*
FONTCS4*
FONTCS5*
FONTCS6*
FONTCS7*
ROMBUFOE*
ROMBUFDIR*
FMCS8:CN4
FMCS10:CN5
:
FMCS12:CN6
FMCS0:CN7
FMCS2:CN7
FMCS4:CN7
FMCS6:CN7
DIPSW
Address
Buffer
IC726,
729,732
System
Controller
IC700
420pin-
BGA
OSC
X700
74.9MHz
Clock
buffer
IC9
System
Controller
IC700
420pin-
BGA
I/O G/A
IC32
240pin-
QFP
DIMM Slot
CN4:8MB-
Flash
CN5:8MB-
Flash
CN6:8MB-
Flash
CN7:32MB
-Mask
(PS Kanji)
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