Description Of Multifunction Pins; Fdc37C67 Multifunction Pin Descriptions - Acer 390 Series Service Manual

2.3.5

Description of Multifunction Pins

Table 2-7

FDC37C67 Multifunction Pin Descriptions

Pin No./QFP Original Function
2 DRVDEN1
Controlled by IRMODSEL(LD8:CRC0.0) and IRRX3SEL(LD8:CRC0.4)
32 PCICLK
33 SERIRQ
Controlled by SERIRQSEL(LD8:CRCO.2)
51 nDACK3
52 DRQ3
Controlled by DMA3SEL(LD8:CRCO.1)
92 nR12
94 nDCD2
Controlled by 8042COMSEL(LD8:CRCO.3) and SERIRQSEL(LD8:CRCO.2)
95 RXD2
96 TXD2
Controlled by IR Option Register(LD5:CRF1.6)
97 nDSR2
98 nRTS2
99 nCTS2
100 nDTR2
Controlled by 16 bit Address Qual.(CR24.6) and SERIRQSEL(LD8:CRC0.2)
Major Chips Description
Alternate Function 1
IR MODE
IRQ4
IRQ3
8042 P16
8042 P12
8042 P16
8042 P12
IRRX
IRTX
SA15
SA12
SA13
SA14
Alternate Function 2
IRRX3
IRQ12
IRQ11
IRQ10
IRQ5
IRQ6
IRQ7
Default
DRVDEN1
PCICLK
SERIRQ
nDACK3
DRQ3
nR12
nDCD2
RXD2
TXD2
nDSR2
nRTS2
nCTS2
nDTR2
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