STPCINDUSTRIAL datasheet(27/55 Pages) STMICROELECTRONICS

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PIN DESCRIPTION

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Issue 1.1

3.2.11 CARDBUS INTERFACE

(Combined with PCI / PCMCIA)

For card bus pinouts, refer to the PCI pinout.

3.2.12 PCI INTERFACE

AD[31:0]

PCI Address/Data. This is the 32-bit

multiplexed address and data bus of the PCI. This

bus is driven by the master during the address

phase and data phase of write transactions. It is

driven by the target during data phase of read

transactions.

BE[3:0]#

Bus Commands/Byte Enables. These

are the multiplexed command and Byte enable

signals of the PCI bus. During the address phase

they define the command and during the data

phase they carry the Byte enable information.

These pins are inputs when a PCI master other

than the STPC Industrial owns the bus and out-

puts when the STPC Industrial owns the bus.

FRAME#

Cycle Frame. This is the frame signal of

the PCI bus. It is an input when a PCI master owns

the bus and is an output when STPC Industrial

owns the PCI bus.

TRDY#

Target Ready. This is the target ready sig-

nal of the PCI bus. It is driven as an output when

the STPC Industrial is the target of the current bus

transaction. It is used as an input when STPC In-

dustrial initiates a cycle on the PCI bus.

IRDY#

Initiator Ready. This is the initiator ready

signal of the PCI bus. It is used as an output when

the STPC Industrial initiates a bus cycle on the

PCI bus. It is used as an input during the PCI cy-

cles targeted to the STPC Industrial to determine

when the current PCI master is ready to complete

the current transaction.

STOP#

Stop Transaction. STOP# is used to im-

plement the disconnect, retry and abort protocol of

the PCI bus. It is used as an input for the bus cy-

cles initiated by the STPC Industrial and is used

as an output when a PCI master cycle is targeted

to the STPC Industrial.

DEVSEL#

I/O Device Select. This signal is used

as an input when the STPC Industrial initiates a

bus cycle on the PCI bus to determine if a PCI

slave device has decoded itself to be the target of

the current transaction. It is asserted as an output

either when the STPC Industrial is the target of the

current PCI transaction or when no other device

asserts DEVSEL# prior to the subtractive decode

phase of the current PCI transaction.

PAR

Parity Signal Transactions. This is the parity

signal of the PCI bus. This signal is used to guar-

antee even parity across AD[31:0], CBE[3:0]#,

and PAR. This signal is driven by the master dur-

ing the address phase and data phase of write

transactions. It is driven by the target during data

phase of read transactions. (Its assertion is identi-

cal to that of the AD bus delayed by one PCI clock

cycle)

SERR#

System Error. This is the system error sig-

nal of the PCI bus. It may, if enabled, be asserted

for one PCI clock cycle if target aborts a STPC In-

dustrial initiated PCI transaction. Its assertion by

either the STPC Industrial or by another PCI bus

agent will trigger the assertion of NMI to the host

CPU. This is an open drain output.

LOCK#

PCI Lock. This is the lock signal of the PCI

bus and is used to implement the exclusive bus

operations when acting as a PCI target agent.

PCI_REQ#[2:0]

PCI Request. These pins are the

three external PCI master request pins. They indi-

cates to the PCI arbiter that the external agents

desire use of the bus.

PCI_GNT#[2:0]

PCI Grant. These pins indicate

that the PCI bus has been granted to the master

requesting it on its PCI_REQ#.

PCI_INT[3:0]

PCI Interrupt Request. These are

the PCI bus interrupt signals. They are to be en-

coded before connection to the STPC Industrial

using ISACLK and ISACLKX2 as the input selec-

tion strobes.

3.2.13 MONITOR INTERFACE

RED, GREEN, BLUE

RGB Video Outputs. These

are the 3 analog color outputs from the RAMDACs

VSYNC

Vertical Synchronisation Pulse. This is

the vertical synchronization signal from the VGA

controller.

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