U631H256BSC45 View Datasheet(PDF) - Zentrum Mikroelektronik Dresden AG
Part Name
Description
Manufacturer
U631H256BSC45 Datasheet PDF : 12 Pages
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NONVOLATILE MEMORY OPERATIONS
No.
STORE CYCLE INHIBIT and
AUTOMATIC POWER UP RECALL
24 Power Up RECALL Durationk
Low Voltage Trigger Level
k: tRESTORE starts from the time VCC rises above VSWITCH.
Symbol
Alt.
tRESTORE
VSWITCH
IEC
Min.
4.0
STORE CYCLE INHIBIT and AUTOMATIC POWER UP RECALL
VCC
5.0 V
VSWITCH AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAA
U631H256
Max.
Unit
650
µs
4.5
V
Power Up
RECALL
24
tRESTORE
t
STORE inhibit
SOFTWARE MODE SELECTION
E
W
A13 - A0
(hex)
Mode
I/O
L
H
L
H
0E38
31C7
03E0
3C1F
303F
0FC0
0E38
31C7
03E0
3C1F
303F
0C63
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Nonvolatile STORE
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
Output Data
Output Data
Output Data
Output Data
Output Data
Output High Z
Power
Active
ICC2
Active
Notes
l, m
l, m
l, m
l, m
l, m
l, m
l, m
l, m
l, m
l, m
l, m
l, m
l: The six consecutive addresses must be in order listed. W must be high during all six consecutive cycles. See STORE cycle and RECALL
cycle tables and diagrams for further details.
The following six-address sequence is used for testing purposes and should not be used: 0E38, 31C7, 03E0, 3C1F, 303F, 339C.
m: While there are 15 addresses on the U631H256, only the lower 14 are used to control software modes.
December 12, 1997
7
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