IA8044/IA8344
SDLC COMMUNICATIONS CONTROLLER
Preliminary Data Sheet
As of Production Version 00
A.C. Characteristics1
External Program Memory Characteristics
Variable Clock 1/TCLCL
= 3.5 MHz TO 12 MHz
12 MHz Osc
Symbol
Parameter
Unit
Min
Max
Min Max
TLHLL
TAVLL
ALE Pulse Width
Address Valid to ALE Low
ns
ns
TLLAX2
TLLIV
TLLPL
TPLPH
TPLIV
TPXIX
TPXIZ3
TPXAV3
TAVIV
TAZPL
Address Hold After ALE Low
ALE Low to Valid Instr. In.
ALE Low to PSENn Low
PSENn Pulse Width
PSENn Low to Valid Instr. In
Input Instr. Hold After PSENn
Input Instr. Float After PSENn
ns
ns
ns
ns
ns
ns
PSENn to Address Valid
Address to Valid Instr. In
Address Float to PSENn
ns
Notes:
1. Actual values will provided for the External Program Memory Characteristics, External Data
Memory Characteristics, and Serial Interface Characteristics tables (pp. 26 – 27) upon completion
of device testing. Values from the original device data sheet may be used to characterize
parameters in the interim.
2.TLLAX for access to program memory is different from TLLAX for data memory.
3. Interfacing RUPI-44 devices with float times up to 75ns is permissible. This limited bus
contention will not cause any damage to Port 0 drivers
Copyright
innovASIC
2001
ENG210010112-00
www.innovasic.com
Customer Support:
1-888-824-4184
The End of Obsolescence
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