SCF5249VM140 datasheet(23/56 Pages) FREESCALE

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Signal Descriptions

SCF5249 Integrated ColdFire® Microprocessor Data Sheet, Rev. 3

Freescale Semiconductor

8.14 Analog to Digital Converter (ADC)

The single output on the TOUT1/ADOUT/GPO35 pin provides the reference voltage in PDM format

therefore this output requires an external integrator circuit (resistor/capacitor) to convert it to a DC level to

be used by the external comparator circuit. Four external comparators compare the DC level obtained after

filtering TOUT1/ADOUT/GPO35 with the relevant input signals. The outputs of the comparators are fed

to the 4 ADIN inputs on the SCF5249: EBUIN3/ADIN0/GPI38, EBUIN4/ADIN1/GPI39,

RXD2/ADIN2/GPI38 and CTS2/ADIN3/GPI31. Selection of function for pin TOUT1/ADOUT/GPO35 is

done by writing GPIO function select register (determines if function is GPIO or not), and differentiation

between timer and adout functions is done in the ADCONFIG Register.

8.15 Secure Digital/ MemoryStick Card Interface

The device has a versatile flash card interface that supports both SecureDigital and MemoryStick cards.

The interface can either support one SecureDigital or two MemoryStick cards. No mixing of card types is

possible. Table 12 gives the pin descriptions.

NOTE

The SDATA0_SDIO1 and RSTO/SDATA2_BS2 signals are only used in the

160 MAPBGA package.

Table 12. Flash Memory Card Signals

Flash Memory Signal

Description

SCLKOUT/GPIO15

Clock out for both MemoryStick interfaces and for SecureDigital

CMD_SDIO2/GPIO34

Secure Digital command line

MemoryStick interface 2 data i/o

SDATA0_SDIO1/GPIO54

SecureDigital serial data bit 0

MemoryStick interface 1 data i/o

SDATA1_BS1/GPIO9

SecureDigital serial data bit 1

MemoryStick interface 1 strobe

RSTO/SDATA2_BS2

SecureDigital serial data bit 2

MemoryStick interface 2 strobe

Reset output signal

Selection between Reset function and SDATA2_BS2 is done by

programming PLLCR register.

SDATA3/GPIO57

SecureDigital serial data bit 3

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