Nortel Networks MSC8101 ADS User Manual

MOTOROLA

47

Functional Description

As can be seen in 

, the FLASH CS is distributed to four CS signals. The distribution

depends on the size of the FLASH module installed - it is read by the BCSR using the PD(1-7) pins.

Support is given to modules that require 5V for programming. The 5V voltage for programming is
taken from the main board voltage supply or 12V from external power supply in protection mode.

BD(0:31)

BA(9:29)

D(31:0)

A(22:0)

FPD1
FPD2
FPD3
FPD4

PD1
PD2
PD3
PD4

FPD5

PD5

FPD6
FPD7

PD6
PD7

FLASH SIMM

BCSR

BWE0
BWE1
BWE2
BWE3

BPOE

FCS0
FCS1
FCS2
FCS3

WE0
WE1
WE2
WE3
OE

CS0
CS1
CS2
CS3

FCSb

BA(7:8)

ADR Ext.

Flash T

ype Detect

BA7

BA8

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Freescale Semiconductor, Inc.

For More Information On This Product,

   Go to: www.freescale.com

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