Elektra CPU User Manual V1.00
Page 8
Digital I/O
♦
24 programmable digital I/O, 3.3V and 5V logic compatible
♦
Input voltage Logic 0: -0.5V min, 0.8V max
♦
Logic 1: 2.0V min, 5.5V max
♦
Input current ±3µA max
♦
Output voltage Logic 0: 0.0V min, 0.4V max
♦
Logic 1: 2.4V min, 3.3V max
♦
Output current Logic 0: 12mA max
♦
Logic 1: -8mA max
♦
I/O capacitance 20pF max
♦
ESD protection: 2KV, contact human body model
Counter/Timers
♦
1 24-bit counter/timer for A/D sampling rate control
♦
1 16-bit counter/timer for user counting and timing functions
♦
Programmable gate and count enable
♦
Internal and external clocking capability