2-12
SIMATIC PC RI25/45, Technical Description
C79000-G7076-C808-01
2.7
Block Diagram of the Motherboard
HD0.7,16..23,32..39,48..55
Host 64Bit data bus 32 Bit address bus 3.3V
3.3/5 V PCI –BUS AD0..32
PIIX
82371FB
System controller
UltraIO
PC87306
800x600 LCD
TFT/STN
Modem
Printer
Centronics
COM1
COM2
LPT1
MUX
’4066
75150/154
75150/154
RC–net
5V
RC network
protection
EPP/ECP
PLINK 0..15
208PQFP
160QFP
max.5A(core)
1A
1A
CPU–io VCC
DC/DC
LT1083CP
5V–> 3.3V
3.5”Floppy
Keyboard/Trackball
Communication
TTY/AG
CPU–core VCC
DC/DC
LT1083CP
5V–> 3.3/2.5V
N7
N8
max.0.5A(IO)
RAS 1/2
RAS 1/2
MD32..63
RAS 3/4
RAS 3/4
dRAM 8,16,32,64,128MB
72pin SIMM
72pin SIMM
72pin SIMM
X19
X21
X20
X22
5V
72pin SIMM
ext.VGA
1024x768x256
CL–GD7543
VGA–LCD
3.3V
TDP
82438FX
3.3V/5V
D1
TDP
82438FX
3.3V/5V
HD8..15,24..31,40..47,56..63
MD0..7,16..23,32..39,48..55
MD8..15,24..31,40..47,56..63
PLINK 8..15
PLINK 0..7
D4
D5
3.3V/5V
Cache
160pol Con.
X23
HA 3..31,HD 0..63
HA 3..31
control lines
FrameBuffer
256x16
dRAM
D12
256x16
dRAM
D11
5V
5V
514171
514171
Legend:
5V....3.3V
VMA 0..9
Taktgenerator
3.3V
ICD2254
D2
14.3181MHz
25,30,33MHz
Pentium
Socket 7
split 3.3V
321 SPGA Ziff
50,60,66MHz
X12
VG–469
PCMCIA–CTRL
VCC/
VPP
Mem. Card
SKAN
SIMATIC S5/S7
’ABT245
VCC/
VPP
SIMATIC
S5 Modules
’ABT245
RS485
MPI
SPC2
FlashBios
128/256 kByte
3.6V
32kHz
10.5MHz,
21MHz
D3
D9
D6
’ABT245
D8
D10
D13
PS/2 Mouse
PCMCIA
Slot–II
Optically
isolated
BIOS
TTL
TTY
PCI Slot
ISA Slot
ISA Slot
Riser–Board
3.3V/5V
5V
5V
188pin.
ISA–BUS 16Bit data 24Bit address 5V
Clocksel
MD0..31
Primary Fast IDE
Hard disk
DD 0..15
Secondary Fast IDE
Hard disk/
CD–ROM
SA 8..19
XD 0..7
SA0..16
1.2A
MA0..11
’ABT245
D14..16
TSC
82437FX
Memorycontroller
3.3V/5V
208PQFP
D7
Connector
for Riser–Board
optional
’ABT245
Figure 2-4 Motherboard
Motherboard