參數(shù)資料
型號: CL-PS7110-VC-A
廠商: CIRRUS LOGIC INC
元件分類: 微控制器/微處理器
英文描述: Low-Power System-on-a-Chip
中文描述: MROM, RISC MICROCONTROLLER, PQFP208
封裝: VQFP-208
文件頁數(shù): 25/82頁
文件大?。?/td> 1101K
代理商: CL-PS7110-VC-A
May 1997
25
DATA BOOK v1.5
FUNCTIONAL DESCRIPTION
CL-PS7110
Low-Power System-on-a-Chip
Now the panel can be connected and the contrast fine-tuned by changing the Pump Control register value
for the appropriate drive output.
Figure 1-6. Sample Schematic for Positive V
EE
Control Circuitry
Example 2
Resistor
Notes
R73
Pull down for positive V
EE
.
R53
Pull up for LM339 open-drain output.
R54
Selects a voltage at the terminal of the comparator, at
which point the feedback output switches off (high), thus
turning off the Drive output.
R56
Selects voltage level on input of comparator to applica-
tion V
REF
(1.5 V).
R62–65
This resistor network allows V
EE
to be programmed
under program control. If all outputs are low, V
EE
is at the
maximum. Turning on the outputs increases the voltage
at the comparator, and therefore decreases V
EE
.
+V
EE
C2
2.2
μ
10
μ
F
GND
GND
GND
GND
GND
C78
R54
330 k
V
REF
LM339
FB0
DRIVE0
R74
UI3A
DRIVE1
FB1
GND
82
81
87
86
100 k
R75
V
DD
100 k
R53
U19
V
DD
L3
47
μ
H
R55
R
100 n
806 k
C44
R64
R65
R63
R62
392 k
200 k
100 k
64
PD4
PD5
PD6
PD7
63
62
61
CL-PS7110
FB1
4
5
3
2
3
2
1
4
D12
1N5818
100 k
DRIVE1
-
+
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