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6-2. IRQ Block Chart
6-3 IRQ Switch
Riser board (parts side)
S1 = IRQ10:
S(1) = ON (Connect IRQ10 to the ISA Slot.)
M(3) = OFF (Connect IRQ10 to GND, not to the ISA
Slot.)
S2 = IRQ11:
S(1) = ON (Connect IRQ11 to the ISA Slot.)
M(3) = OFF (Connect IRQ11 to GND, not to the
ISASlot.)
+5V
10K
0
2.7K
2.7K
0
+5V
10K
FireStar
IRQ9
+5V
10K
0
2.7K
+5V
10K
+5V
1K
IRQ10
IRQ11
SICF(IRQ9)
IRQ3
IRQ4
IRQ5
+5V
10K
1K
+5V
10K
+5V
10K
0
+5V
10K
+5V
10K
Pentium
IRQ15
IRQ3
IRQ4
IRQ10
IRQ11
IRQ5
IRQ6
IRQ7
IRQ12
IRQ8#
IRQ14
PSC2
IRQ9
IRQ15
PIRQ9
PIRQ15
Mask n
IRQn
PIRQ3
PIRQ4
IRQ3
IRQ4
PIRQ10
PIRQ11
IRQ10
IRQ11
IRQ10
IRQ11
IRQ3
IRQ4
IRQ15
IRQ9
ISA Slot
3
1
IRQ5
Super I/O
IRQ6
IRQ7
IRQ5
KBC
KIRQ12
IRQ1
RTC
IRQ8#
IDE CON
DIRQ
=Not used
IRQ6
IRQ7
IRQ12
IRQ14
IRQ1
IRQ11
IRQ10
S2
M
(3)
S
(1)
M
(3)
S
(1)
S1
7. CPU
7-1. Introduction
Intel’s Pentium Processor (A80502CSLM66133SY028) is used.
Pentium Processor Bus Frequency Selection
Core Frequency
(max)
External Bus
Frequency (max)
Bus/Core
Ratio
BF1
(Y33)
BF0
(Y35)
Selection
100MHz
66MHz
2/3
1
1
UP-5300 Setting
Setting 1 = 10kohm Pull up (Vcc3)
0 = 0ohm Grounding
MicroClock MK1492-04R Power-up Input Setting
Pin #
Name
Internal Resistor
Setting
Function
5
OE
Mid-level
Default
All Clock Outputs Enabled
15
CPUS#
Pull up
Default
16
PCISTP#
Pull up
Default
HOST = 66.66MHz
24
FS
Pull up
Default
27
CSSS
Pull up
Default
Power Down Mode = All Clocks On
19
DS
Pull up
Default
HOST7,8 Tristated
21
SEL0
Pull up
Default
48M/14.3M = 48.0MHz
22
LE
Pull up
Pull down
EMI Control ON
25
SEL1
Mid-level
Default
F1 = 14.318MHz
28
PEN
Mid-level
Default
Pin25 = PCI, Pin24=PCIF
The external pull down resistor is 10kohm.
5 – 6
Summary of Contents for UP-5300
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Page 105: ... B S i d e 9 4 ...
Page 106: ...3 V G A P W B A S i d e B S i d e 9 5 ...
Page 107: ...4 R i s e r P W B A S i d e B S i d e 5 T P S w i t c h P W B S w i t c h P W B 9 6 ...
Page 108: ...6 I N V E R T E R P W B A S i d e B S i d e 7 L C D R E L A Y P W B A S i d e B S i d e 9 7 ...