SCF5249VM140 datasheet(20/56 Pages) FREESCALE

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SCF5249 Integrated ColdFire® Microprocessor Data Sheet, Rev. 3

Signal Descriptions

Freescale Semiconductor

8.10 Timer Module Signals

The following signals are external interface to the two general-purpose SCF5249 timers. These 16-bit

timers can capture timer values, trigger external events, or internal interrupts, or count external events.

These pins can be reused as GPO or GPI. Registers GPIO-FUNCTION and GPIO1-FUNCTION must be

programmed for this.

8.11 Serial Audio Interface Signals

All serial audio interface signals can be programmed to serve as general purpose I/Os or as serial audio

interface signals. The function is programmed using GPIO-FUNCTION and GPIO1-FUNCTION

registers.

NOTE

The LRCK3 and SCLK3 signals are only used in the 160 MAPBGA

package..

Table 7. Serial Module Signals

Serial Module Signal

Description

Receive Data

The RXD1_GPI27 and RXD2/ADIN2/GPI28 are the inputs on which

serial data is received by the DUART. Data is sampled on RxD[1:0] on

the rising edge of the serial clock source, with the least significant bit

received first.

Transmit Data

The DUART transmits serial data on the TXD1/GPO27 and

TXD2/GPO28 output signals. Data is transmitted on the falling

edge of the serial clock source, with the least significant bit

transmitted (LSB) first. When no data is being transmitted or

the transmitter is disabled, these two signals are held high.

TxD[1:0] are also held high in local loopback mode.

Request To Send

The RTS1/GPO30 and RTS2/GPO31 request-to-send outputs

indicate to the peripheral device that the DUART is ready to

send data and requires a clear-to-send signal to initiate

transfer.

Clear To Send

Peripherals drive the CTS1/GPI30 and CTS2/ADIN3/GPI31

inputs to indicate to the SCF5249 serial module that it can

begin data transmission.

Table 8. Timer Module Signals

Serial Module Signal

Description

Timer Input

Users can program the TIN0/GPI33 and TIN1/GPIO23 inputs

as clocks that cause events in the counter and prescalars.

They can also cause capture on the rising edge, falling edge,

or both edges.

Timer Output

The TOUT0/GPO33 and TOUT1/ADOUT/GPO35

programmable outputs pulse or toggle on various timer events.

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