SCF5249VM140 datasheet(14/56 Pages) FREESCALE

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SCF5249 Integrated ColdFire® Microprocessor Data Sheet, Rev. 3

Signal Descriptions

Freescale Semiconductor

ISA bus read strobes

CS2/IDE-DIOR/GPIO13

CS3/SRE/GPIO11

There are 2 ISA bus read strobes and

2 ISA bus write strobes. They allow

connection of two independent ISA

bus peripherals, e.g. an IDE slave

device and a SmartMedia card.

In/Out

ISA bus write strobes

IDE-DIOW/GPIO14

SWE/GPIO12

In/Out

ISA bus wait signal

IDE-IORDY/GPIO16

ISA bus wait line - available for both

busses

In/Out

Chip Selects[1:0]

CS0

CS1/GPIO58

Enables peripherals at programmed

addresses.

CS[1:0]. CS[0]provides boot ROM

selection

Out

In/Out

negated

Buffer enable 1

BUFENB1/GPIO57

Two programmable buffer enables

allow seamless steering of external

buffers to split data and address bus

in sections.

In/Out

Buffer enable 2

BUFENB2/GPIO7

In/Out

Transfer acknowledge

TA/GPIO20

Transfer Acknowledge signal

In/Out

Serial Clock Line

SCL0/QSPI_CLK

Clock signal for first I2C module

operation

Signal is also QSPI clock

In/Out

Serial Data Line

SDA0/QSPI_DIN

Serial data port first I2C module

operation

Signal is also QSPI data in

In/Out

Serial Clock Line

SCL1_GPIO_3

Clock signal for second I2C module

operation

In/Out

Serial Data Line

SDA1_GPIO55

Serial data port for second I2C

module operation

In/Out

Receive Data

RXD1/GPI28/ADIN2

RXD0/GPI27

Signal is receive serial data input for

DUART

Transmit Data

TXD1/GPO28

TXD0/GPO27

Signal is transmit serial data output

for DUART

Out

asserted

Request-To-Send

RTS1/GPO31

RTS2/GPO30

DUART signals a ready to receive

data query

Out

negated

Clear-To-Send

CTS1/ADIN3/GPI31

CTS0/GPI30

Signals to DUART that data can be

transmitted to peripheral

CTS2 is multiplexed with an A/D

input

Timer Input

TIN0/GPI33

TIN1/GPIO23

Provides clock input to timer or

provides trigger to timer value

capture logic

In/Out

Timer Output

TOUT0/GPO33

TOUT1/ADOUT/GPO35

Capable of output waveform or pulse

generation

Out

Table 4. SCF5249 Signal Index (continued)

Signal Name

Mnemonic

Function

Input/

Output

Reset

State

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