HT0313A Tomato LSI, Inc., HT0313A Datasheet - Page 28

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

HT0313A
TOMATO LSI Inc.
Table 6-8. Internal Rb / Ra ratio depending on 3-bit Data (R2, R1, R0)
The following figure shows V0 voltage measured by adjusting internal regulator resistor ratio (Rb / Ra) and
6-bit electronic volume registers for each temperature coefficient at Ta = 25 C.
b-1. In case of using internal resistors, Ra and Rb (INTRS = "H")
When INTRS pin is “H”, resistor Ra is connected internally between VR pin and V
between V0 and VR. We determine V0 by two instructions, "Regulator resistor select" and "Set reference
voltage".
1+(Rb/Ra)
V0[V]
14
12
10
8
6
4
2
0
0
65COM / 132SEG DRIVER & CONTROLLER FOR STN LCD
1.90
000
5
28
10
2.19
001
15
Figure 6-14. Electronic volume level
20
2.55
010
25
3-bit data settings (R2 R1 R0: gain)
El ect r oni c vol um e l evel
30
3.02
011
35
40
3.61
100
45
50
55
4.35
101
60
SS
, and Rb is connected
63
Ver 0.0
5.29
110
gai n 111
gai n 110
gai n 101
gai n 100
gai n 011
gai n 010
gai n 001
gai n 000
6.48
111