Specifications

February 2015 IS29GL_128S_01GS_00_Rev.A GL-S MirrorBit
®
Family 67
Data Sheet
8. Signal Protocols
The following sections describe the host system interface signal behavior and timing for the 29GL-S family
flash devices.
8.1 Interface States
Table 8.1 describes the required value of each interface signal for each interface state.
Legend:
L = V
IL
H = V
IH
X = either V
IL
or V
IH
L/H = rising edge
H/L = falling edge
Valid = all bus signals have stable L or H level
Modified = valid state different from a previous valid state
Available = read data is internally stored with output driver controlled by OE#
Notes:
1. WE# and OE# can not be at V
IL
at the same time.
2. Read with Output Disable is a read initiated with OE# High.
3. Automatic Sleep is a read/write operation where data has been driven on the bus for an extended period, without CE# going High and the
device internal logic has gone into standby mode to conserve power.
8.2 Power-Off with Hardware Data Protection
The memory is considered to be powered off when the core power supply (V
CC
) drops below the lock-out
voltage (V
LKO
). When V
CC
is below V
LKO
, the entire memory array is protected against a program or erase
operation. This ensures that no spurious alteration of the memory content can occur during power transition.
During a power supply transition down to Power-Off, V
IO
should remain less than or equal to V
CC
.
If V
CC
goes below V
RST
(Min) then returns above V
RST
(Min) to V
CC
minimum, the Power-On Reset interface
state is entered and the EAC starts the Cold Reset Embedded Algorithm.
Table 8.1 Interface States
Interface State V
CC
V
IO
RESET# CE# OE# WE# A
MAX
-A0 DQ15-DQ0
Power-Off with Hardware
Data Protection
< V
LKO
 V
CC
XXXXXHigh-Z
Power-On (Cold) Reset  V
CC
min
 V
IO
min
 V
CC
XXXXXHigh-Z
Hardware (Warm) Reset  V
CC
min
 V
IO
min
 V
CC
L X X X X High-Z
Interface Standby  V
CC
min
 V
IO
min
 V
CC
H H X X X High-Z
Automatic Sleep (Notes 1, 3)  V
CC
min
 V
IO
min
 V
CC
H L X X Valid
Output
Available
Read with Output Disable
(Note 2)
 V
CC
min
 V
IO
min
 V
CC
H L H H Valid High-Z
Random Read  V
CC
min  V
IO
min H L L H Valid
Output
Valid
Page Read  V
CC
min
 V
IO
min
 V
CC
HLLH
A
MAX
-A4
Valid
A3-A0
Modified
Output
Valid
Write  V
CC
min
 V
IO
min
 V
CC
H L H L Valid Input Valid