Epson PX-8 - Page 320

REV.-A
Pin No. Signal Name
In/Out
Function
70 VR2 In LCD drive voltage
71 VL2 In LCD drive voltage
72 VL 1 In LCD drive voltage
73
VLG In Ground
74
VDD In +5V (Logic circuit voltage supply)
75 YSPU In
Low impedance drive input - Normally high.
When low, the externally connected resistor
parallels
the internal impedance, lowering the
total impedance through which the line can
be driven at
the divided LCD voltages (VL 1 -
5).
76 YDIN In
Serial data input
77
YSCL In Transmission clock input
78 YDIS
In Display control input
79
FR In Frame signal
80 LP In Latch pulse
7-49