FDC37B78X SMSC Corporation, FDC37B78X Datasheet - Page 14

• Manufacturer Part Number: FDC37B78X
• Description: Enhanced Super I/O Controller with ACPI Support/ Real Time Clock and Consumer IR
• Manufacturer: SMSC Corporation

Note 1 Either Edge Triggered Interrupt Inputs.
Note 2 At power-up, RD0-7, nROMCS and nROMOE function as the XD Bus. To use RD0-7 for
Note 3 These pins cannot be programmed as open drain pins in their original function.
REFERENCE DOCUMENTS
§
§
§
§
PIN NO.
QFP
77
78
79
80
81
82
39
91
92
83
84
85
86
87
88
89
90
4
6
2
SMSC Consumer Infrared Communications Controller (CIrCC) V1.X
IEEE 1284 Extended Capabilities Port Protocol and ISA Standard, Rev. 1.14, July 14, 1993.
Hardware Description of the 8042, Intel 8 bit Embedded Controller Handbook.
PCI Bus Power Management Interface Specification, Rev. 1.0, Draft, March 18, 1997.
alternate functions, nROMCS must stay high until those pins are finished being programmed.
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
nMTR1
nDS1
PCI_CLK
DRVDEN1
nROMCS
nROMOE
RD0
RD1
RD2
RD3
RD4
RD5
RD6
RD7
DEFAULT
FUNCT
2,3
2,3
2,3
2,3
2,3
2,3
2,3
2,3
2
2
TABLE 2 - GENERAL PURPOSE I/O PIN FUNCTIONS
nSMI
nRING
WDT
LED
IRRX2
IRTX2
GPIO
GPIO
IRQ14
GPIO
IRQ11
IRQ12
IRQ1
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ10
FUNCT 1
ALT
GENERAL PURPOSE I/O PINS
-
EETI
P17
-
-
-
-
-
GPIO
IRQ8
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
FUNCT 2
ALT
1
14
FUNCT 3
-
-
EETI
-
-
-
-
-
-
nSMI
EETI
EETI
nSMI
LED
nRING
WDT
P17
-
-
-
ALT
1
1
1
BUFFER
TYPE
IO12
IO24
IO24
IO24
IO24
IO12
IO24
IO12
IO12
IO12
IO24
IO12
IO12
IO12
IO12
IO12
IO12
IO4
IO4
IO4
REGISTER
INDEX
GP1
GP1
GP1
GP1
GP1
GP1
GP1
GP1
GP5
GP5
GP5
GP5
GP6
GP6
GP6
GP6
GP6
GP6
GP6
GP6
GP10
GP11
GP12
GP13
GP14
GP15
GP16
GP17
GP50
GP52
GP53
GP54
GP60
GP61
GP62
GP63
GP64
GP65
GP66
GP67
GPIO