SPC5644AF0MLU2 datasheet(58/138 Pages) FREESCALE

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MPC5644A Microcontroller Data Sheet, Rev. 7

Freescale Semiconductor

DSPI_C_SOUT_LVDS-

DSPI_C_SOUT_LVDS+

DSPI

LVDS pair used for DSPI_C TSB mode transmission

PCS_B[0]

PCS_C[0]

PCS_D[0]

DSPI_B - DSPI_D

Peripheral chip select when device is in master mode—slave

select when used in slave mode

PCS_B[1:5]

PCS_C[1:5]

PCS_D[1:5]

DSPI_B - DSPI_D

Peripheral chip select when device is in master mode—not used

in slave mode

SCK_B

SCK_C

SCK_D

DSPI_B - DSPI_D

DSPI clock—output when device is in master mode; input when

in slave mode

SIN_B

SIN_C

SIN_D

DSPI_B - DSPI_D

DSPI data in

SOUT_B

SOUT_C

SOUT_D

DSPI_B - DSPI_D

DSPI data out

ADDR[10:31]

EBI

The ADDR[10:31] signals specify the physical address of the

bus transaction.

The 26 address lines correspond to bits 3-31 of the EBI’s 32-bit

internal address bus.

ADDR[15:31] can be used as Address and Data signals when

configured appropriately for a multiplexed external bus. This

allows 32-bit data operations, or 16-bit data operations without

using DATA[0:15] signals.

ALE

EBI

The Address Latch Enable (ALE) signal is used to demultiplex

the address from the data bus. It is asserted while the least

significant 16 bits of the address are present in the multiplexed

address/data bus.

BDIP

EBI

BDIP is asserted to indicate that the master is requesting

another data beat following the current one.

CS[0:3]

EBI

CSx is asserted by the master to indicate that this transaction is

targeted for a particular memory bank on the Primary external

bus.

DATA[0:31]

EBI

The DATA[0:31] signals contain the data to be transferred for the

current transaction.

EBI

OE is used to indicate when an external memory is permitted to

drive back read data. External memories must have their data

output buffers off when OE is negated. OE is only asserted for

chip-select accesses.

RD_WR

EBI

RD_WR indicates whether the current transaction is a read

access or a write access.

Table 5. Signal details (continued)

Signal

Module or Function

Description

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