Copyright © Siemens AG 2016. All rights reserved
165
ERTEC 200P-2 Manual
Technical data subject to change
Version 1.0
2.3.5.5.2
Write Access
CS and WE signals are key to the individual phases in write access. See the write timing
below.
Figure 15: EMC, Notation definition for a write access (ASYNC)
For the asynchronous interface (SRAM), the data are valid until the end of the HOLD
phase.
MA
DQM_SDRAM/XBE
MD
XWE_ASYNC
ASYNC_WAIT
SETUP
HOLD
STROBE
ASYNC_write.vsd
XCS_ASYNC
Write Data
DTXR
XOE_DRIVER
111...111
CLK AHB
cycle