NT7502H-BDT Ver la hoja de datos (PDF) - Novatek Microelectronics
Número de pieza
componentes Descripción
Fabricante
NT7502H-BDT Datasheet PDF : 54 Pages
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NT7502
Table 6 shows the relationship between oscillation frequency and frame frequency
Table. 6
Duty
1/65
1/55
1/49
1/33
Item
On-chip oscillator is used
On-chip oscillator is not used
On-chip oscillator is used
On-chip oscillator is not used
On-chip oscillator is used
On-chip oscillator is not used
On-chip oscillator is used
On-chip oscillator is not used
fCL
fOSC/6
External input fCL
fOSC/8
External input fCL
fOSC/8
External input fCL
fOSC/12
External input fCL
fFR
fCL/(2 X 65)
fCL/(2 X 65)
fCL/(2 X 55)
fCL/(2 X 55)
fCL/(2 X 49)
fCL/(2 X 49)
fCL/(2 X 33)
fCL/(2 X 33)
Common Output Control Circuit
This circuit controls the relationship between the number of common output and specified duty ratio. Common output mode
select instruction specifies the scanning direction of the common output pads.
Table. 7
Duty Status
COM
[0-15]
COM
[16-23]
COM
[24-26]
Common output pads
COM
[27-36]
COM
[37-39]
COM
[40-47]
COM
[48-63]
COMS
Normal COM[0-15]
NC
COM[16-31]
1/33
COMS
Reverse COM[31-16]
NC
COM[15-0]
Normal
COM[0-23]
NC
COM[24-47]
1/49
COMS
Reverse
COM[47-24]
NC
COM[23-0]
Normal
COM[0-26]
NC
COM[27-53]
1/55
COMS
Reverse
COM[53-27]
NC
COM[26-0]
Normal
1/65
Reverse
COM[0-63]
COM[63-0]
COMS
This is a 197-channel multiplexes that generate voltage levels for driving the liquid crystal. The combination of the display data,
the COM scan signal, and the FR signal produces the liquid crystal drive voltage output.
Figure 6 shows example of the SEG and COM output wave form.
Configuration Setting
The NT7502 has two optional configurations, configured by DUTY0, DUTY1
DUTY1, DUTY0 Common
Segment
V1
V2
V3
V4
1, 1
65
132
8/9V0, 6/7V0 7/9V0, 5/7V0 2/9V0, 2/7 V0 1/9V0, 1/7V0
1, 0
55
132
7/8V0, 5/6V0 6/8V0, 4/6V0 2/8V0, 2/6 V0 1/8V0, 1/6V0
0, 1
49
132
7/8V0, 5/6V0 6/8V0, 4/6V0 2/8V0, 2/6 V0 1/8V0, 1/6V0
0, 0
33
132
5/6V0, 4/5V0 4/6V0, 3/5V0 2/6 V0, 2/5V0 1/6V0, 1/5V0
15
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