8
www.quicklogic.com
2001 QuickLogic Corporation
Eclipse Family Data Sheet
4.0 Programmable Slew Rate
Each I/O has programmable slew rate capability. The rate is programmable to one of two slew rates
either fast or slow. The slower rate can be used to reduce ground bounce noise. The slow slew rate is 1
V/ns under typical conditions. The fast slew rate will be 2.8 V/ns.
NOTE:
Condition: 2.5V, 25C
4.1 Programmable Weak Pull-Down
Programmable weak-pull down resistor is available on each I/O. The I/O Weak Pull-Down eliminates
the need for external pull down resistor for used I/O. The spec for pull-down current is maximum of
150uA under worst case condition. - 148uA @ 3.6V, -55C, - 69 uA@ 2.5V, 25C.
Figure 7: I/O Weak Pull-Down
Table 4: Programmable Slew Rate
VCCIO = 3.3V
Fast Slew
Slow Slew
Rising Edge
2.8 V/nS
1.0 V/vS
Falling Edge
2.86 V/nS
1.0 V/nS
VCCIO = 2.5V
Fast Slew
Slow Slew
Rising Edge
1.7 V/nS
0.6 V/vS
Falling Edge
1.9 V/nS
0.6 V/nS