s6b0724 Densitron Corporation, s6b0724 Datasheet - Page 34

• Manufacturer Part Number: s6b0724
• Description: 132 Seg / 65 Com Driver & Controller For Stn Lcd
• Manufacturer: Densitron Corporation

132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD
In Case of Using External Resistors, Ra and Rb. (INTRS = "L")
When INTRS pin is "L", it is necessary to connect external regulator resistor Ra between VR and V
between V0 and VR.
30
Example: For the following requirements
1. LCD driver voltage, V0 = 10V
2. 6-bit reference voltage register = (1, 0, 0, 0, 0, 0)
3. Maximum current flowing Ra, Rb = 1 uA
From Eq. 1
10 = ( 1 +
From Eq. 2
V
From requirement 3.
From equations Eq. 3, 4 and 5
Ra
Rb
The following table shows the range of V0 depending on the above requirements.
Ra + Rb
EV
= ( 1 -
10
1.69 [M ]
8.31 [M ]
V0
= 1 [uA] ------ (Eq. 5)
Rb
Ra
(63 - 32)
) x V
162
Table 16. V0 Depending on Electronic Volume Level
7.57
EV
0
) x 2.1
[V] ------ (Eq. 3)
1.698 [V] ------ (Eq. 4)
.......
.......
Electronic volume level
PRELIMINARY SPEC. VER. 1.1
10.00
32
.......
.......
SS
12.43
63
, and Rb
S6B0724