HT0313A Tomato LSI, Inc., HT0313A Datasheet - Page 29

• Manufacturer Part Number: HT0313A
• Description: 65COM/132SEG DRIVER & CONTROLLER FOR STN LCD
• Manufacturer: Tomato LSI, Inc.

HT0313A
TOMATO LSI Inc.
When INTRS pin is “L”, it is necessary to connect external regulator resistor Ra between VR and V
Rb between V0 and VR.
Example: For the following requirements
The following table shows the range of V0 depending on the above requirements.
b-2. In case of using external resistors, Ra and Rb. (INTRS = "L")
Table 6-9. V0 depending on electronic volume level
V0
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[ A]
From equation 1
From equation 2
From equation 3
From equation 3,4 and 5
8.83
0
65COM / 132SEG DRIVER & CONTROLLER FOR STN LCD
29
( Ra + Rb )
V
EV
10
10 = ( 1 ++
= ( 1 - -
------
------
(63-32)
300
Rb
Ra
= 1[ A] ------ (Equation 5)
) x V
) x 2.0 = 1.79 [V] ------ (Equation 4)
Ra = 1.79[M ]
Rb = 8.21[M ]
Electric Volume Level
EV
[V] ------
10.00
32
= 32 )
(Equation 3)
-------
-------
Ver 0.0
11.17
63
SS
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