Datasheet

DS80C390 Dual CAN High-Speed Microprocessor
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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 FUNCTION
t Time
A Address
C Clock
CE Chip Enable
D Input Data
H Logic Level High
L Logic Level Low
I Instruction
P
PSEN
Q Output Data
R
RD Signal
V Valid
W
WR Signal
X No longer a valid logic level.
Z Tri-State
Figure 1. Multiplexed External Program Memory Read Cycle