GPMC
7.1.4.1.5 GPMC Configuration for Asynchronous Single Write Access
The clock runs at 104 MHz: (f = 104 MHz; T = 9, 615 ns).
shows how to calculate timings for the GPMC using the memory parameters.
shows the timing parameters (on the memory side) that determine the parameters on the
GPMC side.
shows the synchronous burst write access.
Table 7-50. AC Characteristics for Asynchronous Single Write (Memory Side)
AC Characteristics on the
Description
Duration (ns)
Memory Side
tWC
Write cycle time
60
tAVDP
ADVn low time
6
tWP
Write pulse width
25
tWPH
Write pulse width high
20
tCS
CSn setup time to WEn
3
tCAS
CSn setup time to ADVn
0
tAVSC
ADVn setup time
3
For asynchronous single write access, write cycle time is WrCycleTime = WeO AccessCompletion
= WeO 1. For the AccesCompletion, the GPMC requires 1 cycle of data hold time (CSn de-
assertion).
361
SPRUH73H – October 2011 – Revised April 2013
Memory Subsystem
Copyright © 2011–2013, Texas Instruments Incorporated