DESCRIPTION
The ZEN2044F is a 24bit x 4ch. programmable universal counter LSI. As to command sets, the ZEN2044F has a compatibility with the ZEN2011P. The ZEN2044F can also monitor input signals and detect any abnormal input accompanied with noise or other disturbances, so that the reliability of counted values are secured. Pin Configuration(Top View) B/DN2 A/UP2 Vss SEL22 SEL21 SEL20 LT2 LD2 Vss EXTA2 EXTB2 Vdd Vdd CLK Vss DIR1 UD/AB1 Z/CLR1 B/DN1 A/UP1 n.c. SEL12 SEL11 SEL10 LT1 LD1 Vdd EXTA1 EXTB1 Vss 1. FEATURES
80 24bit binary up/down counter x 4ch. 81 Z/CLR2 80 75 70 65 60 Counter response speed: UD/AB2 DIR2 33MHz(MAX)(CLK fo=33MHz at 50% duty) Vdd EXTB3 85 EXTA3 Input frequency of count pulse Vss LD3 LT3 Two phase-shifted pulse signal input: Vss 90 Vdd DC-8.25MHz (less than fo x 1/4) SEL30 SEL31 SEL32 Up/down pulse signal input: 95 Vss A/UP3 DC-16.5MHz (less than fo x 1/2) B/DN3 Z/CLR3 Vdd Direction recognition for up/down count 5 10 15 20 n.c. 100 100 Abnormal input detection c...
