W83877ATG Nuvoton Technology Corporation of America, W83877ATG Datasheet - Page 137

• Manufacturer Part Number: W83877ATG
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83877ATG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

PRTIQS3-PRTIQS0 (Bit 3-bit 0): Select IRQ resource for the parallel port. Any unselected IRQ pin is
in tri-state.
While in the Serial IRQ mode (IRQMODS=1, CR31 bit2), the above selection is invalid and all the IRQ
signal pins, from IRQ_A to IRQ_H, are in tri-state. The parallel port IRQ is dedicated to the SERIRQ
pin. For the host controller to correctly sample the parallel port IRQ, the parallel port IRQ should be
programmed to appear in one of IRQ/Data Frame sampling periods.
In Serial IRQ mode, the definition of PRTIQS3-PRTIQS0 (bit 3-bit 0) is as follows:
PRTIQS3-PRTIQS0 (Bit 3-bit 0): Select the IRQ/Data Frame sampling period on the SERIRQ pin.
CR27[3:0]
CR27[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
1000
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
- 130 -
W83877ATF/W83877ATG
IRQ/DATA FRAME PERIOD
Reserved for SMI
SELECT IRQ PIN
IRQ_C
IRQ_D
IRQ_G
IRQ_H
IRQ_A
IRQ_B
IRQ_E
IRQ_F
None
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
None
IRQ1
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9