Intel mcs-48 manual 8279

8279, 8279-5

WAVEFORMS

1. Read Operation

ISYSTEM'S

'--------------------	ADDR ESS BUS)
	IREAD CONTROL)

DATA BUS

(OUTPUT) ~~~w.w.~~~w.W.;W~~----------_I~W.;W~~~W.;W~~~w.~

2. Write Operation

AO.a				Y	(SYSTEM'S
				J.M\....------------------ ADDRESS BUS)
	tAw - II .	'ww	,	-twA
	\			~	IWRITE CONTROL)
		... --- tDw -		-- 'wD
DATA BUS	DATA	)( -DATAVALID----. X			DATA
(INPUT)	MAY CHANGE				MAY CHANGE

3. Clock Input

9-80 AFN-00742A-11