W29GL256SH9T-TR Datasheet, PDF (21/88 Pages) Winbond – 256M-BIT 3.0-VOLT PARALLEL FLASH MEMORY WITH PAGE MODE

W29GL256S
Device outputs will provide valid read data from the currently active address map mode at the end of
the random read access time from address stable (tACC), #OE active (tOE), or #CE active (tCE),
whichever happens last.
A list of other transitional states during Random Read operation;
 A new random read access begins if #CE remains LOW and any Address[23:4] signals
change to a new value.
 In order to get Back to Back accesses, requires an address change to initiate the second
access and #CE to remains LOW between accesses Read mode with Outputs Disable, If
#CE remains LOW and #OE goes .
 Write mode, if #CE remains LOW, #OE goes HIGH, and #WE goes LOW.
 Standby mode, if #CE returns HIGH.
8.1.2 Page Read
As in the Random Read mode, a random read access sequence is required. Then if #CE remains
LOW, #OE remains LOW, Address[23:4] signals remains unchanged, and any of the Address[3:0]
signals have change, then a new access within the same Page (32-byte) begins with data appearing
on DQ15-DQ0. The Page Read is much faster (tPACC) than a Random Read access. If #CE goes
HIGH and returns LOW for another access, a random read access is performed and time is required
(tACC or tCE).
8.2 Device Reset Operations
The Hardware Reset (#RESET) input pin provides a hardware method of resetting the device to a
standby mode. Immediately after issuing a Hardware Reset, driving #RESET LOW for at least a
period of tRP:
 Any operations in progress are terminated,
 Memory Map Overlays (MMO) is exited.
 All outputs are set to HIGH-Z.
 The Status Register is reset.
 The Write State Controller goes to the standby mode.
 #CE is ignored for a period of (tRPH), during the reset operation.
 #CE must be held HIGH to meet the Reset current specification (ICC5).
Note: An operation that was interrupted should be reinitiated to ensure data integrity. An operation
command sequence should be executed once the device is ready.
Publication Release Date: Jul 02, 2014
Revision C
21