HP Car 3490A manual lJ, 7451, Siorra, Timingcounter

3 UF F E R S

DATABIT O H

OATABIT C H

. \

'r. ./,> - DATA BIT B H

>.-

: A T A B I T A H

L /

t

H

-

r

TO OISPLAYAND ,

DATA OUTPUT J

.	t o , @ o F		--i
F-	rm,@
I	c@{rs			I
	$ @ O R
I		--l		I
l._	eo,ooo			I
I	couNrs
--\------lJ

\

\ 7

TIMECOUNTI (LTCr)

T OU t 5 i l )

(LCrC)

7CLEARTIMECOUNTERL I F R O MU t 6( t )

TIMINGCOUNTER

7

TIMECOUNT2

(HTC2)	( H r c 4 )
T O U t 5 ( t 3 )
	T r M EC O U N4T T O' , a , O 'I
	(Hrcs). ME couNr 8 ro ur5a4)
	(Hrcr6)	?
	T'MEcouNT16 To ur5rs)

(Hrc3z)TIMEcouNr32 ro urstrzt,I

u r 8 i l 3 ) u. 2 2( 2 )

)

TIMINGCOUNTEROUTPUTS

+I7V FROM POWERSUPPLY

+r2v To u9(28),7 u40t(28) g

- 6 V T O R i l , R 4 4 I

sior'ra

H T C I

Hr.c2

HTC4

H T C S

H T CI 6

H T C 3 2

COUNTS			PERIOD
		6 O H z L I N E		sOHzLINE
+ ro,ooo	+roo.ooo* to,ooo + roo,ooo+ro,ooo+ roo,ooo
ro,ooo	roo,ooo	5 m S			6OnS
20,ooo	200,ooo l 0 m S		IOOmS	l 2 m S	l20mS
40,ooo	400,ooo	2OmS	2OOmS	24mS	24OmS
80,ooo	800,ooo 4 0 m S		4OOmS	48 mS	480mS
r60,ooo	r,600,ooo	EOhS	SOOmS	96mS	95OmS
320.OOO 3,200,ooo l 6 O m S			r . 6s	192mS	t . 9 2 S

I

Figure7-23. SchematicDiagram,Clock and Counters,

7451