SB82371 Intel Corporation, SB82371 Datasheet - Page 74

• Manufacturer Part Number: SB82371
• Description: 82371FB (PIIX) AND 82371SB (PIIX3) PCI ISA IDE XCELERATOR
• Manufacturer: Intel Corporation

82371FB (PIIX) AND 82371SB (PIIX3)
2.5.3.9.
I/O Address:
Default Value:
Attribute:
ELCR1 register allows IRQ3 - IRQ7 to be edge or level programmable on an interrupt by interrupt basis.
IRQ0, IRQ1 and IRQ2 are not programmable and are always edge sensitive.
2.5.3.10.
I/O Address:
Default Value:
Attribute:
ELCR2 register allows IRQ[15,14,12:9] to be edge or level programmable on an interrupt by interrupt basis.
Note that, IRQ[13,8#] are not programmable and are always edge sensitive.
74
7
6
5
4
3
2:0
7
6
5
4
3
2
1
0
Bit
Bit
IRQ15 ECL. 0 = edge triggered mode; 1 = level sensitive mode.
IRQ14 ECL. 0 = edge triggered mode; 1 = level sensitive mode.
Reserved. Must be 0.
IRQ12 ECL. 0 = edge triggered mode; 1 = level sensitive mode.
IRQ11 ECL. 0 = edge triggered mode; 1 = level sensitive mode.
IRQ10 ECL. 0 = edge triggered mode; 1 = level sensitive mode.
IRQ9 ECL. 0 = edge triggered mode; 1 = level sensitive mode.
Reserved. Must be 0.
IRQ7 ECL. 0 = edge triggered mode; 1 = level sensitive mode.
IRQ6 ECL. 0 = edge triggered mode; 1 = level sensitive mode.
IRQ5 ECL. 0 = edge triggered mode; 1 = level sensitive mode.
IRQ4 ECL. 0 = edge triggered mode; 1 = level sensitive mode.
IRQ3 ECL. 0 = edge triggered mode; 1 = level sensitive mode.
Reserved. Must be 0.
ELCR1—Edge/Level Triggered Register
ELCR2—Edge/Level Triggered Register
INT CNTRL-1—4D0h
00h
Read/Write
INT CNTRL-2—4D1h
00h
Read/Write
Description
Description