SCF5250 datasheet(18/48 Pages) MOTOROLA

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SCF5250 Integrated ColdFire® Microprocessor Data Sheet, Rev. 1.1

Signal Descriptions

Freescale Semiconductor

consumption is important the current taken by the divider network (in

stand-by mode) could be excessive. Therefore it is possible to generate a

VDD/2 voltage by selecting SCLK4 output mode and feeding this clock

signal (which is 50% duty cycle) through an external integration circuit.

This would generate a voltage level equal to VDD/2 but would be disabled

when stand-by mode was selected.

4.15 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 11 gives the pin descriptions.

4.16 Queued Serial Peripheral Interface (QSPI)

The QSPI interface is a high-speed serial interface allowing transmit and receive of serial data. Pin

descriptions are given in Table 12.

Table 11. Flash Memory Card Signals

Flash Memory Signal

Description

EBUIN2/SCLKOUT/GPIO13

Clock out for both MemoryStick interfaces and for SecureDigital

EBUIN3/CMD_SDIO2/GPIO14

Secure Digital command line

MemoryStick interface 2 data i/o

DDATAO/CTS1/SDATA0_SDIO1/GPIO1

SecureDigital serial data bit 0

MemoryStick interface 1 data i/o

SCL0/SDATA1_BS1/GPIO41

SecureDigital serial data bit 1

MemoryStick interface 1 strobe

DDATA1/RTS1/SDATA2_BS2/GPIO2

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.

SDA0/SDATA3/GPIO42

SecureDigital serial data bit 3

Table 12. Queued Serial Peripheral Interface (QSPI) Signals

Serial Module Signal

Description

QSPICLK/SUBR/GPIO25

Multiplexed signal IIC interface clock or QSPI clock output

Function select is done via PLLCR register.

RCK/QSPIDIN/QSPI_DOUT/GPIO26

Multiplexed signal IIC interface data or QSPI data input.

Function select is done via PLLCR register.

RCK/QSPI_DIN/QSPI_DOUT/GPIO26

QSPI_DOUT/SFSY/GPIO27

QSPI data output

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