Epson PX-8 - Page 66

Observed O-RAM Control Signal Waveforms
(Top) W1 :
Measured
at 6A. pin 18
(Second form top) RAS 1 :
Measured
at 6A. pin 17
(Second from bottom) CAS 1 :
Measured
at 6A. pin 44
(Bottom) RF:
Measured at 6A. pin 40
2-42
G
G
G
5V
5V
>2uS
-JDDDDDf
lllJIIO run ru[] rmon
=mJITDilllITDITD[
REV.-A
G ----------------------------
5V 5V
Enlarged
5 V
5 V
> 1 uS
G ---=--" ____ U ___ U"-----___"'Lf ___
G •
G "
G --'-J.LII __ ' _. d_---I.L
4
'1_+ __ *
5V
5 V
Fig. 2-38 W1, RAS1, CAS1, and RF