SST89E554 View Datasheet(PDF) - Silicon Storage Technology
Part Name
Description
Manufacturer
SST89E554 Datasheet PDF : 58 Pages
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FlashFlex51 MCU
SST89E564 / SST89V564 / SST89E554 / SST89V554
Preliminary Specifications
ALE
TLHLL
PSEN#
WR#
PORT 0
PORT 2
TLLWL
TWLWH
TAVLL
TLLAX
TQVWX
A7-A0 FROM RI or DPL
TAVWL
TQVWH
DATA OUT
P2[7:0] or A15-A8 FROM DPH
FIGURE 10-8: EXTERNAL DATA MEMORY WRITE CYCLE
TWHLH
TWHQX
A7-A0 FROM PCL
INSTR IN
A15-A8 FROM PCH
384 ILL F15.0
TABLE 10-6: EXTERNAL CLOCK DRIVE
Symbol
1/TCLCL
TCHCX
TCLCX
TCLCH
TCHCL
Parameter
Oscillator Frequency
High Time
Low Time
Rise Time
Fall Time
25MHz
Min Max
20
20
Oscillator
40MHz
Variable
Min Max
Min
Max
0
40
0.35TCLCL
0.35TCLCL
10
0.65TCLCL
0.65TCLCL
10
Units
MHz
ns
ns
ns
ns
T10-6.2 384
VDD = -0.5
0.45 V
0.7 VDD
0.2 VDD -0.1
TCHCL
TCLCX
TCHCX
TCLCH
TCLCL
FIGURE 10-9: EXTERNAL CLOCK DRIVE WAVEFORM
384 ILL F30.0
©2001 Silicon Storage Technology, Inc.
54
S71181-03-000 9/01 384
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