MPC821 datasheet(201/242 Pages) NXP

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MOTOROLA

MPC860TFADS Daughter Board Design Specification—Rev 0.1

PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE

GPL2~

I, L

General Purpose Line 2 for UPMA or UPMB. Used with the

SDRAM, as a CAS~ signal.

GND

WE3~

I, L

GPCM Write Enable 3 or PCMCIA WE~. Selects the LSB within a

word for the Flash Simm or qualiﬁes Writes for the PC-Card.

GND

WE2~

I, L

GPCM Write Enable 2 or PCMCIA OE~. Selects the offset 2 Byte

within a word for the Flash Simm or open data buffers for read

from PC-Card.

GND

WE1~

I, L

GPCM Write Enable1 or PCMCIA I/O Write. Used to qualify write

cycles to the Flash memory and as I/O Write for the PCMCIA

channel.

GND

BS2A~

I, L

Byte Select 2 for UPMA. Selects offset 2 bytes within Word. Used

for Dram access.

GND

WE0~

I, L

GPCM Write Enable 0 or PCMCIA I/O Read. Used to qualify write

cycles to the Flash memory and as I/O Reads from PC-Card.

GND

SPARE1

I,O, L

MPC spare line 1. Pulled - up but otherwise unused on the FADS.

GND

EDOOE~

I,L

In fact UPMA or UPMB General Purpose Line 1. Used for Output

Enable with EDO Dram simms, which have this input (most of

them don’t). Used also as RAS signal for the SDRAM.

GND

BS0A~

I, L

Byte Select 0 from UPMA. Selects offset 0 Bytes within a word.

Used as one of the CAS~ lines for Dram access.

GND

BS3A~

I, L

Byte Select 3 from UPMA. Selects offset 3 Bytes within a word.

Used as one of the CAS~ lines for Dram access.

GND

A31

I, T.S.

MPC’s Address line 31.

GND

BS1A~

I, L

Byte Select 1 from UPMA. Selects offset 1 Bytes within a word.

Used as one of the CAS~ lines for Dram access.

GND

TABLE 5-9. PM1 Interconnect Signals

Pin No.

Signal Name

Attribute

Description

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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