PC97307 datasheet(18/218 Pages) NSC

18 / 218 page

Signal/Pin Connection and Description

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GPIO20

GPIO21

GPIO22

GPIO23

GPIO27-24

157

77, 158

159

160

76-73

General

Purpose

I/O

Group 10

General Purpose I/O Signals 27-20 – General purpose I/O port 2

signals.

GPIO27-24 are multiplexed with XD5-2, respectively.

GPIO23 is multiplexed with RING.

GPIO22 is multiplexed with POR.

GPIO21 is multiplexed on pin 158 with IRSL2, IRSL0 and on pin 77

with IRSL2, SELCS and XD6. See “SuperI/O Conﬁguration 2

GPIO20 is multiplexed with IRSL1.

HDSEL

FDC

Output

Group 16

Head Select – This output signal determines which side of the FDD

is accessed. Active low selects side 1, inactive selects side 0.

ID0

ID1

ID2

ID3

78 or 157

158

UART2

Input

Group 1

Identiﬁcation – These ID signals identify the infrared transceiver for

Plug and Play support. These pins are read after reset.

ID0 is multiplexed on pin 79 with IRRX2 and IRSL0.

ID1 is multiplexed on pin 78 with IRSL1 and XD7, or on pin 157 with

GPIO20 and IRSL1.

ID2 is multiplexed on pin 158 with GPIO21, IRSL2 and IRSL0.

ID3 is multiplexed on pin 70 with XDRD.

See Table 1-2 on page 23 for more information.

INDEX

FDC

Input

Group 1

Index – This input signal indicates the beginning of an FDD track.

INIT

117

Parallel Port

I/O

Group 13

Initialize – When this signal is active low, it causes the printer to be

initialized. This signal is in TRI-STATE after a 1 is loaded into the

corresponding control register bit.

An external 4.7 K

Ω pull-up resistor should be employed.

IOCHRDY

ISA-Bus

Output

Group 22

I/O Channel Ready – This is the I/O channel ready open drain

output signal. When IOCHRDY is driven low, the EPP extends the

host cycle.

IRQ1

IRQ5-3

IRQ12-6

IRQ15,14

39-37

47-41

49,48

ISA-Bus

I/O

Group 15

Interrupt Requests 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14 and 15 – IRQ

polarity and push-pull or open-drain output selection is software

conﬁgurable by the logical device mapped to the IRQ line.

Keyboard Controller (KBC) or Mouse interrupts can be conﬁgured by

the Interrupt Request Type Select 0 register (index 71h) as either

edge or level.

The parallel port interrupt is either edge or level, according to the

operation mode (default edge, conﬁgured by the SuperI/O Parallel

Port Conﬁguration register at index F0h).

IRRX2,1

79, 80

UART2

(SIR)

Input

Group 1

Infrared Reception 1 and 2 – Infrared serial input data.

IRRX2 is multiplexed with IRSL0 and ID0. See Table 1-2 on page 23

for more information.

IRSL0

IRSL1

IRSL2

79 or 158

78 or 157

77 or 158

UART2

(SIR)

Output

Infrared Control Signals 0, 1 and 2 – These signals control the

Infrared analog front end. The pins on which these signals are driven

is determined by the SuperI/O Conﬁguration 2 register (index 22h).

See Section 2.4.4 on page 35. IRSL0 or ID0/IRRX2 on pin 79 is

determined by UART2 bit 5 of the IRCFG4 register (See page 165).

IRSL0 is multiplexed on pin 79 with IRRX2 and ID0, or on pin 158

with GPIO21, IRSL2 and ID2.

IRSL1 is multiplexed on pin 78 with XD7 and ID1, or on pin 157 with

GPIO20 and ID1.

IRSL2 is multiplexed on pin 77 with XD6, SELCS and GPIO21, or on

pin 158 with GPIO21, IRSL0 and ID2.

79, 78, 77

Group 17

158, 157

Group 10

Signal/Pin

Name

Number

Module

I/O and

Group #

Function

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PC97307 数据表(PDF) 18 Page - National Semiconductor (TI)

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