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Dram single-beat transactions -16 – Intel STRONGARM SA-1100 User Manual

Page 130

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10-16

SA-1100

Developer’s Manual

Memory and PCMCIA Control Module

Figure 10-3

shows the rate of the shift registers during DRAM nCAS timing for a single-beat

transaction.

Figure 10-3. DRAM Single-Beat Transactions

A4777-01

CPU Clock

Memory Clock

ADDR

Reads:

Latch Input Data

nOE

TRP

nRAS

nCAS

COL

DO

ROW

ROW

Writes:

Input Data

DO

Write Data

Contents of DRAM register fields:

MDCAS1 = 11 0001 1000 11000 (binary) MDCAS0 = 0110 0011 0001 1000 1100 0110 0000 0111 (binary)

nWE

first

last

time

MDCNFG:TRP = 4 MDCNFG:CDB2 = 1 TDL = 00