mach215-24ji Lattice Semiconductor Corp., mach215-24ji Datasheet - Page 28

• Manufacturer Part Number: mach215-24ji
• Description: High-density Ee Cmos Programmable Logic
• Manufacturer: Lattice Semiconductor Corp.

28
POWER-UP RESET
The MACH devices have been designed with the capa-
bility to reset during system power-up. Following power-
up, all flip-flops will be reset to LOW. The output state
will depend on the logic polarity. This feature provides
extra flexibility to the designer and is especially valuable
in simplifying state machine initialization. A timing dia-
gram and parameter table are shown below. Due to the
synchronous operation of the power-up reset and the
Parameter
Symbol
t
t
PR
t
WL
S
Registered
Output
Power
Clock
Parameter Descriptions
Power-Up Reset Time
Input or Feedback Setup Time
Clock Width LOW
4 V
Power-Up Reset Waveform
MACH215-12/15/20
t
PR
wide range of ways V
conditions are required to insure a valid power-up reset.
These conditions are:
1. The V
2. Following reset, the clock input must not be driven
from LOW to HIGH until all applicable input and
feedback setup times are met.
t
WL
CC
t
S
rise must be monotonic.
CC
can rise to its steady state, two
See
Switching
Characteristics
16751E-31
Max
10
V
CC
Unit
s