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| IA80C152 Datasheet, PDF (25/32 Pages) InnovASIC, Inc – UNIVERSAL COMMUNICATIONS CONTROLLER | |||
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Page 25 of 32
IA80C152
Preliminary Data Sheet
UNIVERSAL COMMUNICATIONS CONTROLLER
Figure 8: External Data Memory Write Cycle
ALE
PSENn
WRn
TLLWL
TWLWH
TWHLH
PORT0
PORT2
TLLAX
TAVLL
TQVWX
A0-A7 FROM R OR DPL
DATA OUT
TAVWL
P2.0-P2.7 OR A8-A15 FROM DPH
TWHQX
A0-A7 FROM PCL
INSTR. IN
A8-A15 FROM PCH
Table 10: External Clock Drive
Symbol
1/TCLCL
TCHCX
TCLCX
TCLCH
TCHCL
Parameter
Oscillator Frequency
High Time
Low Time
Rise Time
Fall Time
Min
Max
Units
3.5
16.5
MHz
20
ns
20
ns
20
ns
20
ns
Figure 9: External Clock Drive Waveform
Vcc - 0.5
0.7 Vcc
0.45V
0.2 Vcc - 0.1
TCHCL
TCLCX
TCHCX
TCLCH
TCLCL
Copyright © 2000
innovASIC
[_________The End of Obsolescenceâ¢
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