Epson PX-8 - Page 107

REV.-A
The FR signal is supplied to the LCD X and Y drivers to accomplish the display as follows:
Table 2-15
--~------------------------480dots-------------------------------
1
3 5
7
9
11 13 15
2 4 6 8 10 12 14 16
2 17 19 21 23 25 27 29 31 18
20 22
24
26 28 30 32
3 33 35 37 39 41 43 45 47 34
36 38
40 42 44 46
48
4 49 51
53
55 57
59
61
63 50 52 54 56 58 60 62 64
5
65
67
69
71 73
75
77 79
66 68 70
72 74 76 78 80
64 1009 1011
1013
1015
1017 1019 1021 1023 1010 1012 1014 1016 1018 1020 1022 1024
I
64
dots
Data are displayed on the LCD panel as dots; numbers in Table 2-15 correspond to dot positions
on the display screen .. At least 64 LP pulses are required to display all the dots. Thus, a data
transfer time of approximately 18.2 ms (285 Jis x 64) and the same amount of non-data-transfer
time - i.e., a total of approximately 36.4 ms, - are required for each 1-panel display cycle.
The data transfer and non-transfer cycles can be altered as shown in Fig. 2-86 by changing the J5
jumper connection.
Jumper setting
J5=A
J5 =8
,
,
,
,
,
,
:<
7680-bit transfer time
15360-bit transfer time
,
, 30720-bit transfer time
:<
1 -panel display cycle
Fig. 2-86
,
,
,
>'
Jumper J5 may need to be reset in order to reduce ghost display lines due to the difference in li-
quid crystal
characteristics between LCD panels.
2-83