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Signal Name
Pin No.
Signal Type
(Drive)
Selected By
Signal Description
OSC32
C7
I
32KHz Clock: This signal is used as a 32KHz clock input. It is used
for power management and is usually the only active clock when the
system is in Suspend mode.
OSC32 is a 5.0V tolerant input, even when its power plane is
connected to 3.3.V as long as the 5VREF pins of FireStar are
connected to +5.0V.
CPUCLKIN
M5
I
Feedback input to Circuitry: This input clock must be equivalent to,
and in phase with, the clock going to the CPU.
Note: This is a CMOS-level input and therefore it is imperative that
the rise time on this signal is less than or equal to 2.5ns.
8-3-4. ISA Interface Signal Set
Signal Name
Pin No.
Signal Type
(Drive)
Selected By
Signal Description
Interrupt Controller Interface
IRQ1
AF18
I
PCIDV1
8Ah = 00h
Interrupt Request 1: Normally connected to the keyboard controller.
IRQ1 is a 5.0V tolerant input, even when its power plane is
connected to 3.3.V as long as the 5VREF pins of FireStar are
connected to +5.0V.
IRQA/IRQ3
AC19
I
Programmable Interrupt Request A/IRQ3: This input defaults to
IRQ3, however, it can be programmed to route onto any ISA or PCI
interrupt through PCIDV1 B0h.
IRQA/IRQ3 is a 5.0V tolerant input, even when its power plane is
connected to 3.3.V as long as the 5VREF pins of FireStar are
connected to +5.0V.
IRQB/IRQ4
AD19
I
Programmable Interrupt Request B/IRQ4: This input defaults to
IRQ4, however, it can be programmed to route onto any ISA or PCI
interrupt through PCIDV1 B1h.
IRQB/ITQ4 is a 5.0V tolerant input, even when its power plane is
connected to 3.3.V as long as the 5VREF pins of FireStar are
connected to +5.0V.
IRQC/IRQ5
AE19
I
Programmable Interrupt Request C/IRQ5: This input defaults to
IRQ5, however, it can be programmed to route onto any ISA or PCI
interrupt through PCIDV1 B2h.
IRQC/IRQ5 is a 5.0V tolerant input, even when its power plane is
connected to 3.3.V as long as the 5VREF pins of FireStar are
connected to +5.0V.
IRQD/IRQ6
AF19
I
Programmable Interrupt Request D/IRQ6: This input defaults to
IRQ6, however, it can be programmed to route onto any ISA or PCI
interrupt through PCIDV1 B3h.
IRQD/IRQ6 is a 5.0V tolerant input, even when its power plane is
connected to 3.3.V as long as the 5VREF pins of FireStar are
connected to +5.0V.
IRQC/IRQ7
AD20
I
Programmable Interrupt Request E/IRQ7: This input defaults to
IRQ7, however, it can be programmed to route onto any ISA or PCI
interrupt through PCIDV1 B4h.
IRQ8#
AE20
I
PCIDV1
8Bh = 00h
Interrupt Request 8: Normally connected to the RTC alarm output.
IRQF/IRQ9
AF20
I
Programmable Interrupt Request F/IRQ9: This input defaults to
IRQ9, however, it can be programmed to route onto any ISA or PCI
interrupt through PCIDV1 B5h.
IRQG/IRQ10
AB22
I
Programmable Interrupt Request G/IRQ10: This input defaults to
IRQ10, however, it can be programmed to route onto any ISA or PCI
interrupt through PCIDV1 B6h.
IRQH/IRQ11
AC21
I
Programmable Interrupt Request H/IRQ11: This input defaults to
IRQ11, however, it can be programmed to route onto any ISA or PCI
interrupt through PCIDV1 B7h.
IRQ12
AD21
I
PCIDV1
8Ch = 00h
Interrupt Request 12: Normally connected to the mouse interrupt
from the keyboard controller.
IRQ14
AE21
I
PCIDV1
8Dh = 00h
Interrupt Request 14: Normally connected to the primary IDE
channel.
IRQ15
AF21
I
PCIDV1
BBh[0] = 0
Interrupt Request 15: Normally connected to the secondary IDE
channel.
IRQSER
AE18
I/O
PCIDV1
BAh[0] = 0
Serial interrupt Request: Bidirectional interrupt line for Compaq
style of serial IRQs.
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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 ...