U632H64
Nonvolatile Memory Operations
Mode Selection
A12 - A0
(hex)
E
W
HSB
Mode
I/O
Power
Notes
H
L
L
L
X
H
L
H
H
H
H
X
X
X
Not Selected
Read SRAM
Write SRAM
Output High Z
Output Data
Input Data
Standby
Active
Active
Active
l
H
0000
1555
0AAA
1FFF
10F0
0F0F
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Output Data
Output Data
Output Data
Output Data
Output Data
Output High Z
k, l
k, l
k, l
k, l
k, l
k
Nonvolatile STORE
L
H
H
0000
1555
0AAA
1FFF
10F0
0F0E
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Nonvolatile
RECALL
Output Data
Output Data
Output Data
Output Data
Output Data
Output High Z
Active
k, l
k, l
k, l
k, l
k, l
k
X
X
L
X
STORE/Inhibit
Output High Z
I
CC2/Standby
m
k: The six consecutive addresses must be in order listed (0000, 1555, 0AAA, 1FFF, 10F0, 0F0F) for a Store cycle or (0000, 1555, 0AAA, 1FFF,
10F0, 0F0E) for a RECALL cycle. W must be high during all six consecutive cycles. See STORE cycle and RECALL cycle tables and dia-
grams for further details.
The following six-address sequence is used for testing purposes and should not be used: 0000, 1555, 0AAA, 1FFF, 10F0, 139C.
l: I/O state assumes that G ≤ VIL. Activation of nonvolatile cycles does not depend on the state of G.
m: HSB initiated STORE operation actually occurs only if a WRITE has been done since last STORE operation. After the STORE (if any)
completes, the part will go into standby mode inhibiting all operation until HSB rises.
Symbol
PowerStore Power Up RECALL/
No.
Conditions
Min.
Max.
Unit
Hardware Controlled STORE
Alt.
IEC
24 Power Up RECALL Durationn, e
25 STORE Cycle Duration
26 HSB Low to Inhibit One
27 HSB High to Inhibit Offe
28 External STORE Pulse Widthe
HSB Output Low Currente, o
HSB Output High Currente, o
Low Voltage Trigger Level
tRESTORE
tHLQX
650
10
μs
ms
μs
ns
ns
mA
μA
V
>
td(H)S VCC 4.5 V
tHLQZ
tdis(H)S
1
tHHQX
ten(H)S
700
tHLHX
tw(H)S
250
3
IHSBOL
IHSBOH
VSWITCH
HSB = VOL
HSB = VIL
5
60
4.0
4.5
n: tRESTORE starts from the time VCC rises above VSWITCH
.
o: HSB is an I/O that has a week internal pullup; it is basically an open drain output. It is meant to allow up to 32 U632H64 to be ganged
together for simultaneous storing. Do not use HSB to pullup any external circuitry other than other U632H64 HSB pins.
August 15, 2006
STK Control #ML0047
7
Rev 1.1
SIMTEK [ SIMTEK CORPORATION ]
