Epson PX-8 Technical Manual 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