Omega ISA- BUS MULTI-FUNCTIONAL BOARD OME-A822PG Manual de usuario Pagina 9

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1.3.7 Programmable Timer/Counter
z Type : 82C54 -8 programmable timer/counter
z Counters : Counter1 and counter2 are cascaded as a 32 bit pacer timer.
Counter0 is a user available timer/counter. The software driver also uses
counter0 to implement a machine independent timer.
z Clock input frequency : DC to 10 MHz
z Pacer output : 0.00047Hz to 0.5MHz
z Input ,gate : TTL compatible
z Internal Clock : 2 MHz
1.3.8 Direct Memory Access Channel (DMA)
z Level : CH1 or CH3, jumper selectable
z Enable : via DMA bit of control register
z Termination : by interrupt on T/C
z Transfer rate : 100K conversions/sec.
OME-A-822PGL/PGH Hardware Manual ---- 7
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