SC1100 datasheet(35/348 Pages) NSC

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Signal Definitions (Continued)

Table 2-7. Four-Signal /Group Multiplexing

Ball

No.

Default

Alternate1

Alternate2

Alternate3

Signal

Configuration

Signal

Configuration

Signal

Configuration

Signal

Configuration

---

GPIO

Sub-ISA

D22

GPIO14

PMR[2] = 0 and

PMR[21] = 0

IOCS1#

PMR[2] = 1 and

PMR[21] = 0

IOR#

PMR[2] = 0 and

PMR[21] = 1

DOCR#

PMR[2] = 1 and

PMR[21] = 1

---

Infrared

GPIO

AC97

FPCI Monitoring

AE18

IRRX11

PMR[6] = 0

PMR[0] = x and

PMR[27] = 0

and

FPCI_MON = 0

GPIO16

PMR[6] = 1 and

PMR[0] = 0 and

PMR[27] = 0

and

FPCI_MON = 0

PC_BEEP

PMR[6] = 1 and

PMR[0] = 1 and

PMR[27] = 0

and

FPCI_MON = 0

F_DEVSEL#

PMR[27] = 1 or

FPCI_MON = 1

(overrides

PMR[6] and

PMR[0])

GPIO

UART

IDE Channel 1

FPCI Monitoring

AF11

GPIO7

PMR[17] = 0

and PMR[8] = 0

and

PMR[27] = 0

and

FPCI_MON = 0

RTS#

PMR[17] = 1

and PMR[8] = 0

and

PMR[27] = 0

and

FPCI_MON = 0

IDE_DACK1

PMR[17] = 0

and PMR[8] = 1

and

PMR[27] = 0

and

FPCI_MON = 0

F_C/BE3#

PMR[27] = 1 or

FPCI_MON = 1

(overrides

PMR[17],

PMR[8], and

PMR[18])

AC12

GPIO8

CTS#2

IDE_DREQ13

SMI_O#

AD12

GPIO6

PMR[18] = 0

and PMR[8] = 0

DTR#/

BOUT

PMR[18] = 1

and PMR[8] = 0

IDE_IOR1

PMR[18] = 0

and PMR[8] = 1

INTR_O

AE12

GPIO9

DCD#4

IDE_IOW1

F_IRDY

AF12

GPIO10

DSR#5

IDE_IORDY16

F_FRAME#

IRRX1 input: If selected but not used, should be tied high.

CTS# input: If selected but not used, should be tied low.

IDE_DREQ1 input: If selected but not used, should be tied low.

DCD# input: If selected but not used, should be tied high.

DSR# input: If selected but not used, should be tied low.

IDE_IORDY1 input: If selected but not used, should be tied high.

SC1100 Datasheet(PDF) 35 Page - National Semiconductor (TI)

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