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K40P81M100SF2 Datasheet, PDF (53/60 Pages) Freescale Semiconductor, Inc – K40 Sub-Family Data Sheet | |||
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6.9.3 LCD electrical characteristics
Dimensions
Table 44. LCD electricals
Symbol
fFrame
CLCD
CBYLCD
CGlass
VIREG
ÎRTRIM
â
IVIREG
IRBIAS
RRBIAS
VLL2
Description
Min.
Typ.
Max.
Unit
LCD frame frequency
28
30
58
Hz
LCD charge pump capacitance â nominal value
â
100
â
nF
LCD bypass capacitance â nominal value
â
100
â
nF
LCD glass capacitance
â
2000
8000
pF
VIREG â HREFSEL = 0
⢠HREFSEL = 0
⢠HREFSEL = 1
VIREG TRIM resolution
VIREG ripple
⢠HREFSEL = 0
⢠HREFSEL = 1
VIREG current adder â RVEN = 1
0.89
1.49
3.0
â
â
â
1.00
1.67
y â
r â
aâ
in1
1.15
1.85
â
V
V
% VIREG
30
mV
50
mV
â
µA
RBIAS current adder
⢠HREFSEL = 0
⢠HREFSEL = 1
â
10
â
1
lim RBIAS resistor values
⢠LADJ = 00 or 01 â Low load (LCD glass
â
0.28
capacitance ⤠2000 pF)
⢠LADJ = 10 or 11 â High load (LCD glass
e capacitance ⤠8000 pF)
â
2.98
r VLL2 voltage
⢠HREFSEL = 0
P ⢠HREFSEL = 1
2.0 â 5%
2.0
3.3 â 5%
3.3
â
â
â
â
â
â
µA
µA
MΩ
MΩ
V
V
VLL3
VLL3 voltage
⢠HREFSEL = 0
⢠HREFSEL = 1
3.0 â 5%
3.0
â
V
5 â 5%
5
â
V
Notes
1
1
2
3
3
1. The actual value used could vary with tolerance.
2. VIREG maximum should never be externally driven to any level other than VDD - 0.15 V
3. 2000 pF load LCD, 32 Hz frame frequency
7 Dimensions
K40 Sub-Family Data Sheet Data Sheet, Rev. 1, 11/2010.
Freescale Semiconductor, Inc.
Preliminary
53
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