FDC37B727-NS Standard Microsystems (SMSC), FDC37B727-NS Datasheet - Page 11

• Manufacturer Part Number: FDC37B727-NS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37B727-NS

• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

PIN NO.
GENERAL PURPOSE I/O PINS
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 alternate
Note 3: These pins cannot be programmed as open drain pins in their original function.
QFP
77
78
79
80
81
82
39
91
92
83
84
85
86
87
88
89
90
4
6
2
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
FUNCTION
DEFAULT
2,3
2,3
2,3
2,3
2,3
2,3
2,3
2,3
2
2
TABLE 3 - 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
ALTERNATE
FUNCTION 1
-
EETI
-
-
-
-
-
GPIO
IRQ8
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
P17/P12
ALTERNATE
FUNCTION 2
1
4
11
-
-
EETI
-
-
-
-
-
-
nSMI
EETI
EETI
nSMI
LED
nRING
WDT
P17/P12
-
-
-
ALTERNATE
FUNCTION 3
1
1
1
4
IOP4/(OP12/
OD12)
IOP4/I/I
IOP4/O4/IO4/I
IOP4/O24
IOP4/I
IOP4/O24
(O24/OD24)/
IOP4
(O24/OD24)/
IOP4
CLKIN/(O12/
OD12)/IOP4
(O24/OD24)
/IOP4/
(OP12/OD12)/
(OP12/OD12)
IO12/(O12/
OD12)/IOP4/I
IO12/(O12/
OD12)/IOP4/I
IO12/(O12/
OD12)/IOP4/
(OP12/OD12)
IO12/(O12/
OD12)/IOP4/
O24
IO12/(O12/
OD12)/IOP4/I
IO12/(O12/
OD12)/IOP4/
O4
IO12/(O12/
OD12)/IOP4/
IO4
IO12/(O12/
OD12)/IOP4
IO12/(OP12/
OD12)/IOP4
IO12/(O12/
OD12)/IOP4
BUFFER
TYPE
5
INDEX
REG.
GP1
GP1
GP1
GP1
GP1
GP1
GP1
GP1
GP5
GP5
GP5
GP5
GP6
GP6
GP6
GP6
GP6
GP6
GP6
GP6
GPIO
GP10
GP11
GP12
GP13
GP14
GP15
GP16
GP17
GP50
GP52
GP53
GP54
GP60
GP61
GP62
GP63
GP64
GP65
GP66
GP67