80C186XL/80C188XL
EXPLANATION OF THE AC SYMBOLS
Each timing symbol has from 5 to 7 characters. The first character is always a ‘T’ (stands 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:
ARY: Asynchronous Ready Input
C: Clock Output
Address
CK: Clock Input
CS: Chip Select
CT: Control (DT/R, DEN, . . . )
D:
Data Input
DE: DEN
H:
Logic Level High
OUT: Input (DRQ0, TIM0, . . . )
L:
Logic Level Low or ALE
Output
O:
QS: Queue Status (QS1, QS2)
R:
S:
RD Signal, RESET Signal
Status (S0, S1, S2)
SRY: Synchronous Ready Input
V:
W:
X:
Z:
Valid
WR Signal
No Longer a Valid Logic Level
Float
Examples:
T
T
T
Ð Time from Clock low to Address valid
Ð Time from Clock high to ALE high
Ð Time from Clock low to Chip Select valid
CLAV
CHLH
CLCSV
39
ETC [ ETC ]
