SWITCHING WAVEFORMS
Input, I/O, or
Input, I/O,
or Feedback
V
V
T
T
Feedback
t
t
t
H
PD
S
Combinatorial
Output
V
V
T
T
Clock
t
CO
Registered
Output
V
T
16564-007
16564-008
a. Combinatorial output
b. Registered output
t
WH
V
Input
T
Clock
t
t
EA
ER
t
WL
V
- 0.5V
+ 0.5V
OH
V
T
Output
V
OL
16564-009
16564-010
c. Clock w idth
d. Input to output disable/enable
Input
Asserting
Input
Asserting
t
ARW
Asynchronous
Preset
Synchronous
Preset
V
T
V
T
t
t
t
H
SPR
t
S
AR
Registered
Output
V
V
T
T
Clock
t
CO
t
ARR
Registered
Output
V
V
T
T
Clock
16564-011
16564-012
e. Asynchronous reset
f. Synchronous preset
Notes:
1. V = 1.5 V.
T
2. Input pulse amplitude 0 V to 3.0 V.
3. Input rise and fall times 2 ns to 5 ns typical.
24
PALCE22V10 and PALCE22V10Z Families
LATTICE [ LATTICE SEMICONDUCTOR ]
