Sharp AR-M550U - Page 7

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)