MC6840

www.DataSheet4U.com MOTOROLA Order this document by MC6840/D s SEMICONDUCTOR TECHNICAL DATA MC6840 Programmable Timer Module (PTM) .!,. A),,),, l.~:~ :.*L~\,\. The MC6840 is a programmable subsystem component of the M6800 Family designed to provide t,., ~ ,,.l.,.,$.. ,1. ., ~ *:~\ ,:::’~” ,<$,+ variable system time intervals. ){t t,$.~ t.+ \ “:tt+.:?.,:t:’i’ The MC6840 has three 16-bit binary counters, three corresponding control registers, and a status \.:?,\\, +, ,,,.F+ \ ~! ,;&~ register. These counters are under software control and may be used to cause system interrupts .’\’ :,~>.,,, .~...~. ~:,~:;, ~<~r.. .. ..+ ..+ ,.,,. andlor generate output signals. The MC6840 may be utilized for such tasks as frequency measure~ L.4!:s+” .<\;: \ *Y>:” *. ments, event counting, interval measuring, and similar tasks. The device may be used for square *;L* “-’. ~.\\,\. ~.t.:~,,, wave generation, gated delay signals, single pulses of controlled duration, and pulse width modul~?~’’’*,., ~ .$ tion as well as system interrupts. ,>~+ ‘$tt5, -*, .,d:P:.. 3... ~ .,> re, TJ, in ‘C can be obtained from: where: TA OJA pD PINT TJ =TA+ (PD*OJA) ;., $ i< ~.s>>,, :<:*, ‘.~~ ..$.’ = Arn~~~m\,fem peratu re, ‘C = +P@k~d’’Thermal Resistance, Junction-to-Ambient, ‘Cm ,~~~~~+ PpORT , !kd~~ x Vcc, $: (1) Pp~T3W$=’*~...