7. COMMAND
S1D15722D01B000 Technical Manual (Rev.1.1)
EPSON
39
Relationship between the register value with the set register and internal clock frequency when the built-in
oscillation circuit is used is as follows:
Target value
Internal clock
frequency
Frame frequency
f
FR
[Hz]
P3 P2 P1 P0
f
CL
[kHz]
184 lines
160 lines
128 lines
96 lines
0 0 0 0
80.0
217
250
313
417
0 0 0 1
71.1
193
222
278
370
0 0 1 0
64.0
174
200
250
333
0 0 1 1
58.2
158
182
227
303
0 1 0 0
53.3
145
167
208
278
0 1 0 1
49.2
134
154
192
256
0 1 1 0
45.7
124
143
179
238
0 1 1 1
42.7
116
133
167
222
1 0 0 0
40.0
109
125
156
208
1 0 0 1
35.6
97
111
139
185
1 0 1 0
32.0
87
100
125
167
1 0 1 1
29.1
79
91
114
152
1 1 0 0
26.7
72
83
104
139
1 1 0 1
24.6
67
77
96
128
1 1 1 0
22.9
62
71
89
119
1 1 1 1
21.3
58
67
83
111
* After resetting by the
____
RES pin, it is set to (0, 1, 0, 0).
* Indicates the typical value at 25°C.
(22) Discharge ON/OFF
This command allows the capacitor connected to the power supply circuit to be discharged, which is required
for the following instances.
•
When turning off the system power supply V
DD
-V
SS
•
When changing the number of display lines
See (4) When changing the number of display lines and (5) Power supply OFF in 7.3 Setup Example of
Instructions (Reference Example).
E R/
__
W
A0
___
RD
___
WR D7 D6 D5 D4 D3 D2 D1 D0
Setting
0 1 0 1 1 1 0 1 0 1 0
Discharge
OFF
1
Discharge ON
*: Set to discharge ON during reset by the
____
RES pin and set to discharge OFF after clearing reset.
This command short-circuits each liquid crystal drive voltages to V
SSH
with switching elements. Be sure to
execute this command after turning off the external power supply to avoid possible breakdown caused by over
current.
Содержание S1D15722 Series
Страница 1: ...Rev 1 1 S1D15722D01B000 Technical Manual ...
