Epson PX-8 - Page 326

REV.-A
Pin No. Signal Name
In/Out
Function
57
N/C
-
Not used.
58 LWE Out Local read/write signal: Read/write signals
for V-RAM.
Low level gives write signal.
59 YSPU Out Y speed up signal: LP signal with timing
shifted by a half cycle. Output at an
interval of approx. 280 /l,Sec.
Has an
on-time of approx. 10f1,.
60 YDOO Out Y data: Y line data for LCD display
61 YSCL
Out
Y shift clock: Shifts Y data to falling edge of
clock to be shifted. Output at an inter-
val
of approx. 280 f1,sec.
62 YDIS
Out
Y display: Displayed on LCD when HIGH.
63 FR
Out
Frame signal: Connected
to XY driver.
64 LP Out Latch pulse signal: Connected to XY driver.
Latches data at falling edge.
Output at
an interval of approx. 280 f1,sec.
65 XSCL
Out
X shift clock: Shifts X data
66 XDO Out X data 0: X line data
for
LCD
display.
67
XD 1 Out X data 1 : X line data
for
LCD
display.
68 XD2 Out X data 2:
X line
data
for LCD display.
69
XD3
Out
X data
3:
X line data for LCD display.
70 XECL
Out
X enable clock. Output 8 pulses at an inter-
val
of approx. 280 f1,sec.
71 VC
-
Circuit voltage (+5V)
72
N/C
-
Not used.
73 LOSC In Local clock (4.8 MHz)
74
N/C
-
Not used.
75
G
-
Circuit ground
7-55