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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.
P10
I/O
(4mA)
PCIDV1
8Ah
¹
00h
Programmable Input/Output 10: See Section 3.3, "Programmable
I/O Pins", on page 33 for more details.
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.
PIO11
I/O
(4mA)
PCIDV1
8Bh
¹
00h
Programmable Input/Output 11: See Section 3.3, "Programmable
I/O Pins", on page 33 for more details.
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.
PIO12
I/O
(4mA)
PCIDV1
8Ch
¹
00h
Programmable Input/Output 12: See Section 3.3, "Programmable
I/O Pins", on page 33 for more details.
IRQ14
AE21
I
PCIDV1
8Dh = 00h
Interrupt Request 14: Normally connected to the primary IDE
channel.
PIO13
I/O
(4mA)
PCIDV1
8Dh
¹
00h
Programmable Input/Output 13: See Section 3.3, "Programmable
I/O Pins", on page 33 for more details.
IRQ15
AF21
I
PCIDV1
BBh[0] = 0
Interrupt Request 15: Normally connected to the secondary IDE
channel.
SIN#
PCIDV1
BBh[0] = 1
Serial Input: Serial interrupt return line for Intel style of serial IRQs.
5 – 20
Summary of Contents for UP-5700
Page 139: ...1 UP 5700 Main PWB CHAPTER 10 PWB LAYOUT A side 10 1 ...
Page 140: ...2 UP 5700 CPU PWB A side UP 5700 CPU PWB B side 10 2 ...
Page 141: ...3 UP 5700 KEY I F PWB A side CN2 UP 5700 KEY I F PWB B side 10 3 ...
Page 144: ...For components produced in January 1998 and onward Parts side Solder side 10 6 ...
Page 145: ...7 2 Sub PWB Side A Side B 10 7 ...