Kyocera KM-1820 - Main PWB

2GM
2-3-1
ASIC
(U2)
CPU
(U1)
CPUA [31:0]
CPUD [31:0]
LD [31:16] LD [15:0]
LA [22:2]
LA [22:5]
ROMA[4:2],
ROMOEN[0],
ROMCSN[1:0],
ROMWEN[0]
ROMA[1],
ROMOEN[1],
ROMCSN[3]
ROMA[1],
ROMOEN[0],
ROMCSN[3],
ROMWEN[0]
ROMA[1],
ROMOEN[1],
ROMCSN[2]
CFCSN[1],
CFOEN[1],
CDETA[2:1],
CFWAITN[1],
CFWE[1]
KUIOCSN[1],IODATACKN[1],KUIOIR[1],
KUIORDY[1],KUIORSTN[1],IORN[1],
IOWN[1],DMAREQR[1],DMAREQT[1],
DMAACKRN[1],DMAACKTN[1]
LA [21:2]
LA [21:2]
LA [22:2]
SDA [12:0]
SDD [31:0]
SDA [12:0]
SDD [31:0]
LA [20:2]
Flash
memory
(U13)
API ROM
socket
(YS4)
CODE
DIMM
(YS1)
SDRAM
(U14,15)
SDRAM
DIMM
slot
(YS2)
FAX
control
PWB
(YC1)
Compact
Flash
socket
(YC2)
Font
ROM
(U12)
Transceiver
(U4,6,8,10)
RTC
(U11)
Latch
(U5,7,9)
Scanner I/F
(YC6)
Laser
scanner unit
(YC8)
Parallel I/F
(YC3)
USB
(YC4)
Ethernet
(YC5)
Front panel
(YC13)
Engine I/F
(YC7)
Debugger I/F
(YC10)
EEPROM
(YS5)
CCDRD,CCDBED,CCDGOD,
CCDSH,CCDCLP,CCDRS,
CCDCLK,CCDSW[1:0]
AUDIO,FRRSTN,PANTXD,
PANRXD,PANRTS,PANCTS
OUTPEN,ENGINE,SDIR,SBSY,
PDMASKN,SI,PLGCLK,RESINX,
PAGESET,SO,SCKN
VDFONSPL,OUTPEN.
VDATA,BDN
USB DAT[15:0]
DBTXD,DBRXD,DBCLK
IICSCL,IICSDA
U21
TXD[3:0],
RXD[3:0]
U22
PDAT[8:0]
U20
Figure 2-3-1 Main PWB circuit block diagram
2-3-1 Main PWB