Kyocera Mita FS-6750 Service Manual page 91

Operation theory
Logic controller system
Figure 4.16 Main controller block diagram
CSN [1:0],
OEN0, WEN0
U03-U05
LA [22:2]
Buffers
CPUA [31:0]
U01
CPUD [31:0]
CPU
PowerPC405GF
160 MHz
BCLK, BGN,
TAN, TEAN,
RSTOUTN, CPUINTN
ABBN, DBBN, TBSTN,
TSIZ [2:0], TT1, TT3
X01
X'tal
40.00 MHz
X02
X'tal
22.40520 MHz
U32, U33
SDA [12:0], SDBA [1:0]
SDRAM
SDD [31:0]
SDCLK, SDCKE,
Expanding
SDCSN [3:0],
SDRAM
SDRAS, SDCAS,
(DIMM)
SDWEN,
DQMUU, DQMUM,
YS02
DQMLM, DQMLL
IICSDA, IICSCL
SCLK, SI, SO, SDIR, BD,
ENGIRN, SBSY, VDFON,
VDOUTP, VDOUTN,
FPDIR, FPCLK, PFDAT
YC01
Engine
Board
+5 V
+3.3 V KUIO
U24
Regulator
FS-6750
YS01
System
DIMM
[board]
ROMA [4:2]
U02
ASIC
P1284HD,
ACK,
BUSY,
U31 PERROR,
U22T
SELECT,
AND NAND
FAULT,
P1284DIR,
U17
SELECTIN,
STROBE,
Centronics
AUTOFD,
Buffer
INIT,
P1284DIR
YC02
Parallel
Interface
CPUD [15:0]
U06, U07
Buffers
U08, U09S
ROMA1
LA [21:2]
LD [15:0]
YC06
LA22,
LA [11:2]
LD [15:0]
(Microdrive)
YC04
LA [16:2]
LD [15:0]
U12, U13
CFA20,
CFA [11:2]
XTXD,
XDTR,
YC05
XRTS,
XDSR,
Option
XCTS,
memory card
XRXD,
(CompactFlash)
RSSEL
+5 V
YC13
Serial
Regulator
Interface
(For Korea only)
4-33
EXTBOEN,
EXTDIR
CSN [3:2]
FONTs
OEN1,
(WEN0)
CFCSN1, CFCSN2,
Option
CFOEN2, CFWEN2,
hard disk
CDET2A, CDET2B,
CFRST2,
CFWAITN2
KUIOCSN1
IORN1, IOWN1,
OPRDY1,
DMAACKN1
KUIO-LV
OPRST1,
IODTACKN1,
OPIRN1,
DMAREQ1
EXTBOEN,
Buffers
CFOEN1
CFD [15:0]
CFCSN1, CFCSN2,
CFOEN1, CFWEN1,
CDET1A, CDET1B,
CFRST1, CFWAIT1
+5 V
+3.3 V
U20 U21
Regulator
,
+2.5 V