DS80C390_05 Datasheet, PDF (4/53 Pages) Dallas Semiconductor – Dual CAN High-Speed Microprocessor

DS80C390 Dual CAN High-Speed Microprocessor
AC SYMBOLS
The DS80C390 uses timing parameters and symbols similar to the original 8051 family. The following list of timing
symbols is provided as an aid to understanding the timing diagrams.
SYMBOL
t
A
C
CE
D
H
L
I
P
Q
R
V
W
X
Z
FUNCTION
Time
Address
Clock
Chip Enable
Input Data
Logic Level High
Logic Level Low
Instruction
PSEN
Output Data
RD Signal
Valid
WR Signal
No longer a valid logic level.
Tri-State
Figure 1. Multiplexed External Program Memory Read Cycle
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