SST89E52RC Datasheet, PDF (51/57 Pages) Silicon Storage Technology, Inc – FlashFlex MCU

FlashFlex MCU
SST89E52RC / SST89E54RC
Data Sheet
ALE
PSEN#
WR#
PORT 0
PORT 2
TLHLL
TWHLH
TLLWL
TWLWH
TAVLL
TLLAX
TQVWX
A0-A7 FROM RI or DPL
TAVWL
TQVWH
DATA OUT
P2[7:0] or A8-A15 FROM DPH
TWHQX
A0-A7 FROM PCL
INSTR IN
A8-A15 FROM PCH
1259 F33.0
FIGURE 12-3: External Data Memory Write Cycle
TABLE 12-8: External Clock Drive
Symbol
1/T_CLCL
T_CLCL
T_CHCX
T_CLCX
T_CLCH
T_CHCL
Parameter
Oscillator Frequency
High Time
Low Time
Rise Time
Fall Time
12MHz
Min Max
83
20
20
Oscillator
33MHz
Variable
Min Max
Min
Max
0
40
30.3
10.6
10.6
10
0.35T_CLCL
0.35T_CLCL
0.65T_CLCL
0.65T_CLCL
10
Units
MHz
ns
ns
ns
ns
ns
T12-8.2 1259
VDD _{- 0.5}
0.45 V
0.7VDD
0.2 VDD - 0.1
TCHCL
TCLCX
TCHCX
TCLCH
TCLCL
FIGURE 12-4: External Clock Drive Waveform
1259 F34.0
©2007 Silicon Storage Technology, Inc.
51
S71259-04-000
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