EM65168 ELAN Microelectronics Corp, EM65168 Datasheet - Page 22
EM65168
Manufacturer Part Number
EM65168
Description
80 Com/seg Lcd Driver
Manufacturer
ELAN Microelectronics Corp
Datasheet
1.EM65168.pdf
(34 pages)
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EM65168
80 COM/SEG LCD Driver
18 •
BF
The BF register controls the operating frequency of the booster.
Note that the EM65168A has fixed some control bits of the Control Register, so those
original user using EM83040A can use external resistor and set V
by adding external resistors, Ra’, Rb’, but Ra’ and Rb’ values must to be MΩ level; the
fixed control bits are shown below:
Address
500H
501H
502H
IF the Step-up capacitor (C2 as shown in Fig. 12) is less than 1 µF, the BF control
register must be set to “0”.
BF
0
1
The control register (500H) is fixed at 11011110
The BSE bit is fixed at 0, and the IRS bit is fixed at 1
The control register (502H) is fixed at 0000x100
PMS1 PMS0 REG5 REG4 REG3 REG2 REG1 REG0
Bit 7
BSE
BF
Bit 6
BS2
RF2
Operating Clock Frequency in the Booster
V
1
=
1 (
Bit 5
BS1
RF1
+
Rb
Ra
Bit 4
'
'
BS0
RF0
(This specification is subject to change without further notice)
)
1.5kHz × 4
⋅
V
1.5kHz
NOTE
EV
NOTE
Bit 3
IRS
=
X
. 1
Product Specification (V1.0) 04.26.2006
56
DON
Bit 2
⋅
IR2
1 (
+
Ra
Rb
Bit 1
HPM
IR1
'
'
)
EV
Bit 0
RES
IR0
=1.56V, to get
Fixed Bits
11011110
0000x100
0xxx1xxx
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