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X28HC64
Write Cycle Limits Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits
established by characterization and are not production tested.
TYP
PARAMETER
Write Cycle Time (Note 7)
SYMBOL
t WC
MIN
(Note 3)
2
MAX
5
UNIT
ms
Address Setup Time
Address Hold Time
Write Setup Time
Write Hold Time
CE Pulse Width
OE High Setup Time
OE High Hold Time
WE Pulse Width
WE HIGH Recovery (Note 8)
Data Valid (Note 8)
Data Setup
Data Hold
Delay to Next Write (Note 8)
t AS
t AH
t CS
t CH
t CW
t OES
t OEH
t WP
t WPH
t DV
t DS
t DH
t DW
0
50
0
0
50
0
0
50
50
50
0
10
1
ns
ns
ns
ns
ns
ns
ns
ns
ns
μs
ns
ns
μs
Byte Load Cycle
t BLC
0.15
100
μs
NOTES:
7. t WC is the minimum cycle time to be allowed from the system perspective unless polling techniques are used. It is the maximum time the device
requires to automatically complete the internal write operation.
8. t WPH and t DW are periodically sampled and not 100% tested.
WE Controlled Write Cycle
t WC
ADDRESS
CE
OE
t AS
t CS
t OES
t AH
t OEH
t CH
t WP
WE
t DV
DATA IN
DATA OUT
12
t DS
DATA VALID
HIGH Z
t DH
FN8109.2
August 28, 2009
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