Epson PX-8 - Page 67

REV.-A
Observed D-RAM Refresh Signal Waveforms
(Top) Z-RF:
Measured
at 6A, pin 29
(Bottom) FR:
Measured at 6A, pin 40
2-43
5V 2jJS
G
G_i~I_1 ~I--,--
5V
Enlarged
5V
tOOnS
G----~/------~\~--
G ______________ \_~~l~------------
5V
Fig. 2-39 Z-RF and RF