FlashFlex MCU
SST89E516RD2 / SST89E516RD
SST89V516RD2 / SST89V516RD
Data Sheet
T
LHLL
ALE
T
WHLH
PSEN#
T
T
WLWH
LLWL
WR#
T
T
LLAX
T
T
AVLL
QVWX
WHQX
T
QVWH
A0-A7 FROM RI or DPL
PORT 0
PORT 2
DATA OUT
A0-A7 FROM PCL
INSTR IN
T
AVWL
P2[7:0] or A8-A15 FROM DPH
A8-A15 FROM PCH
1273 F34.0
FIGURE 14-5: External Data Memory Write Cycle
TABLE 14-9: External Clock Drive
12MHz
Oscillator
40MHz
Variable
Symbol
1/TCLCL
TCLCL
Parameter
Min
Max
Min
Max
Min
Max
Units
MHz
ns
Oscillator Frequency
0
40
83
25
TCHCX
TCLCX
High Time
Low Time
Rise Time
Fall Time
8.75
8.75
0.35TCLCL
0.35TCLCL
0.65TCLCL
0.65TCLCL
ns
ns
TCLCH
TCHCL
20
20
10
10
ns
ns
T14-9.0 1273
V
DD - 0.5
0.7V
DD
T
CHCX
T
CLCH
0.2 V
- 0.1
0.45 V
DD
T
T
CLCX
CHCL
T
CLCL
1273 F35.0
FIGURE 14-6: External Clock Drive Waveform
©2007 Silicon Storage Technology, Inc.
S71273-03-000
1/07
73
SST [ SILICON STORAGE TECHNOLOGY, INC ]
