Video Controller Block Diagram - Samsung ML-7300 series Service Manual

8-3 Video Controller Block Diagram

ROM
72PIN SIMM
29F800
8Mbit Flash Memory
29F800
8Mbit Flash Memory
Mask Font ROM
KM23C8105DG
Mask Font ROM
KM23C8105DG
4
74F32
3
2
74F04
nWR
F_WR_E
DRAM
72PIN SIMM
72PIN SIMM
64Mbit DRAM
KM416C4104BS-5
64Mbit DRAM
KM416C4104BS-5
TL7705
Supply
Voltage
Supervisor
ACK ,BUSY,SELECT,ERROR,FAULT
*
SELIN
5 STROBE
AUTOFD
Centronics Connector
Computer
Samsung Electronics
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Video Controller Board Block Diagram
32
ADDR(2:22)
21
A20
RD_FLASH
*
WR_FLASH1,2,3
RCS(0:3)
4
SPGP1
Memory Data Bus
DRAMD(0:31) 32
Memory Address Bus
DRAMA(0:11) 11
nDRAMCAS(0:3)
nDRAMRAS(0:3),nDRAMWE
9
4
EIRQ(0:3)
*
6
nIOCS(0:5)
*
74F14
RESET
*
*
*
4
PD(0:7)
*
INI
8
*
Engine I/F Connector
Engine Controller B'd
DATA(0:31)
ADDR(0:31)
32
22
CPU
32
POWER PC
MPE603E
100MHz
TS ,TT1,nTSBT,TSIZ(0:2)
*
nTA,RST ,INT ,nTS,nBG
* *
SYSCLK
FS741
Frequency
OSC-CLOCK
Scaling EMI
50MHz
Attenuator
ADDR(2:11)
10
8
DATA(24:31)
IOCSO,nRD,nWR
3
Video (Data)
*
ASIC
nLSYNC
(Hyper)
VCLK
*
RST
*
OSC-CLOCK
nWAIT
78.45496MHz
nWR
nRD nWR IOCSO
nRD
INT *
74F32
DATA(0:15)
DATA(0:15)
16
16
74HCT273
74ACT245
D Flip-Flop
Transceiver
3
93C66
4Mbit
serial
9
DATA(24:31)
EEPROM
8
IOCS3,EIRQ1
ADDR4,5,15
PANEL 20Pin
nRD,nWR
USB_RST ,V_BUS
LCD Display Panel
DATA(0:31)
Regulator
3.3V
nFSYNC
ADDR(2:18)
C
DATA(16:31)
OPTION
o
n
n
Net
e
nWAIT Work
c
Card
nRD
t
nWR
o
TT1
r
BRDIN
*
IOCS1
IOCS2
OPTION
EIRQ2
Local
Talk
Co
&
8
nn
Serial
ec
to
r OPTION
IrDA
*
&
Serial
8-3