STPCI2(2002) 查看數據表（PDF） - STMicroelectronics

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STPCI2
(Rev.:2002)

X86 Core PC Compatible System-on-Chip for Terminals

STMicroelectronics 

PIN DESCRIPTION

Table 2-2. Definition of Signal Pins

Signal Name Dir Buffer Type1

Description

Qty

ISA BUS INTERFACE

LA[23:17]

O BD8STRUP_FT

Unlatched Address Bus

7

SA[19:0]

O BD8STRUP_FT

Latched Address Bus

20

SD[15:0]

I/O BD8STRP_FT

Data Bus

16

IOCHRDY

I BD8STRUP_FT

I/O Channel Ready

1

ALE

O BD4STRP_FT

Address Latch Enable

1

BHE#

O BD8STRUP_FT

System Bus High Enable

1

MEMR#, MEMW# I/O BD8STRUP_FT

Memory Read & Write

2

SMEMR#, SMEMW# O BD8STRP_FT

System Memory Read and Write

2

IOR#, IOW#

I/O BD8STRUP_FT

I/O Read and Write

2

MASTER#

I BD4STRUP_FT

Add On Card Owns Bus

1

MCS16#

I BD4STRUP_FT

Memory Chip Select 16

1

IOCS16#

I BD4STRUP_FT

I/O Chip Select 16

1

REF#

I BD8STRP_FT

Refresh Cycle

1

AEN

O BD8STRUP_FT

Address Enable

1

IOCHCK#

I BD4STRUP_FT

I/O Channel Check (ISA)

1

RTCRW#

O BD4STRP_FT

RTC Read / Write#

1

RTCDS#

O BD4STRP_FT

RTC Data Strobe

1

RTCAS

O BD4STRP_FT

RTC Address Strobe

1

RMRTCCS#

O BD4STRP_FT

ROM / RTC Chip Select

1

GPIOCS#

I/O BD4STRP_FT

General Purpose Chip Select

1

IRQ_MUX[3:0]

I BD4STRP_FT

Multiplexed Interrupt Request

4

DACK_ENC[2:0]

O BD4STRP_FT

DMA Acknowledge

3

DREQ_MUX[1:0]

I BD4STRP_FT

Multiplexed DMA Request

2

TC

O BD4STRP_FT

ISA Terminal Count

1

ISAOE#

I BD4STRP_FT

ISA (0) / IDE (1) SELECTION

1

KBCS#

I/O BD4STRP_FT

External Keyboard CHIP SELECT

1

ZWS#

I BD4STRP_FT

ZERO WAIT STATE

1

PCMCIA INTERFACE

RESET

O BD8STRP_FT

Reset

1

A[23:0]

O BD8STRUP_FT

Address Bus

24

D[15:0]

I/O BD8STRP_FT

Data Bus

16

IORD#, IOWR#

O BD8STRUP_FT

I/O Read and Write

2

WP / IOIS16#

I BD4STRUP_FT

DMA Request // Write Protect

I/O Size is 16 bit

1

BVD2, BVD1

I BD4STRUP_FT

Battery Voltage Detect

2

READY# / IREQ#

I BD4STRUP_FT

Busy / Ready# // Interrupt Request

1

WAIT#

I BD8STRUP_FT

Wait

1

OE#

O BD8STRUP_FT

Output Enable // DMA Terminal Count

1

WE#

O BD4STRP_FT

Write Enable // DMA Terminal Count

1

REG#

O BD4STRUP_FT

DMA Acknowledge // Register

1

CD2#, CD1#

I BD4STRUP_FT

Card Detect

2

CE2#, CE1#

O BD4STRP_FT

Card Enable

2

VCC5_EN

O BD4STRP_FT

Power Switch control: 5 V power

1

VCC3_EN

O BD8STRP_FT

Power Switch control: 3.3 V power

1

VPP_PGM

O BD8STRP_FT

Power Switch control: Program power

1

VPP_VCC

O BD4STRP_FT

Power Switch control: VCC power

1

GPI#

I BD4STRP_FT

General Purpose Input

1

Note1; See Table 2-3 for buffer type descriptions

Issue 1.0 - July 24, 2002

15/111

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