GMS90C320 Datasheet, PDF (29/46 Pages) Hynix Semiconductor – HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS90C320
AC Characteristics
Explanation of the AC Symbols
Each timing symbol has 5 characters. The first character is always a ‘t’ (stand for time). The other characters, depending on
their positions, stand for the name of a signal or the logical status of that signal. The following is a list of all the characters
and what they stand for.
A: Address
C: Clock
D: Input Data
H: Logic level HIGH
I: Instruction (program memory contents)
L: Logic level LOW, or ALE
P: PSEN
Q: Output Data
R: RD signal
T: Time
V: Valid
W: WR signal
X: No longer a valid logic level
Z: Float
For example,
t_AVLL = Time from Address Valid to ALE Low
t_LLPL = Time from ALE Low to PSEN Low
OCT. 2000 Ver 1.2
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