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PDF MN838898 Data sheet ( Hoja de datos )
| Número de pieza | MN838898 | |
| Descripción | CMOS LSI source driver for color TFT LCD panels | |
| Fabricantes | Panasonic Semiconductor | |
| Logotipo |  |
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Color TFT LCD Driver
MN838898
1. Type
CMOS LSI source driver for color TFT LCD panels
2. Overview
This LSI converts the digital display data from a personal computer, portable
device, or other source into analog signals for driving a color TFT LCD panel.
3. Features
(1) Power saving driver
(2) Built in DA converter accepting 6-bit digital input (for 262,144 colors)
(3) Choice of 360 and 324 drive outputs
(4) Input data bus at pixel level
(5) Choice of output data format: gray scale or binary
(6) Eleven reference voltage inputs for producing 10 segment gamma
adjustment graph.
(7) Set output voltage inflection points at data values 00, 01, 07, 0F, 17, 1F,
27, 2F, 37, 3E, and 3F.
(8) Prechargeless drive circuits
(9) Support for serial cascade connections
(10) Automatic internal clock stop after fixed number of data inputs
(11) Choice of shift register shift direction: right or left
(12) Gray scale data inversion available every clock cycle
(13) Low voltage operation: 2.5 V (typ.) for logic circuits; 3.5 V (typ.)
for analog circuits
(14) Maximum operating clock frequency: 15 MHz
(15) Power save function for cutting off current to outputs, fixing them
at high impedance
Publication date: August 2002
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MN838898
6.2 Relationships Between Data Input and Output Pins
(1) Gray scale data input (MODE2 = Low)
The following summarizes the relationships between data input and output pins for gray scale
data input (MODE2 = Low).
So, binary data input is naturally ignored during gray scale data input.
MODE2 = Low, RL = High
Rn 6 DX0 to 5
Bn 6 DY0 to 5 Source driver shifts right (RL = High)
Gn 6 DZ0 to 5
n=1, 2･, ･･,120 (108) YX1 YY1 YZ1 YX2 YY2 YZ2
324 outputs
YX120YY120 YZ120
R1 B1 G1 R2 B2 G2
R1 B1 G1 R2 B2 G2
R120 B120 G120
(R108) (B108) (G108)
R120 B120 G120
(R108) (B108) (G108)
R1 B1 G1 R2 B2 G2
MODE2 = Low, RL = Low
R1 B1 G1 R2 B2 G2
R1 B1 G1 R2 B2 G2
R120 B120 G120
(R108) (B108) (G108)
324 outputs
R120 B120 G120
(R108) (B108) (G108)
R120 B120 G120
(R108) (B108) (G108)
R1 B1 G1 R2 B2 G2
R120 B120 G120
(R108) (B108) (G108)
YZ120 YY120YX120YZ119YY119YX119
Rn 6 DZ0 to 5
Bn 6 DY0 to 5
Gn 6 DX0 to 5
Source driver shifts left (RL = Low)
n=1, 2･, ･･,120 (108)
YZ1 YY1 YX1
(2) Binary input (MODE2 = High)
Binary input uses only the pins DX5, DY5, and DZ5. The relationships between data input
and output pins are otherwise the same.
So, binary data input is naturally ignored during gray scale data input.
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MN838898
6.8.3 Relationship between Reference Voltages and Output Voltages
The following Table gives the formulas for converting input data for INV = Low.
Table 6.8 Relationship between Reference Voltages and Output Voltages
(AVDD > VREF0 ≥ VREF1 ≥ VREF2 ≥ … …≥ VREF9 ≥ VREF10 > AVSS )
Input
data
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
1Ah
1Bh
1Ch
1Dh
1Eh
1Fh
Formula for calculating output voltage
VREF0
VREF2 + (VREF1 to VREF2) × 6/7
VREF2 + (VREF1 to VREF2) × 5/7
VREF2 + (VREF1 to VREF2) × 4/7
VREF2 + (VREF1 to VREF2) × 3/7
VREF2 + (VREF1 to VREF2) × 2/7
VREF2 + (VREF1 to VREF2) × 1/7
VREF2
VREF3 + (VREF2 to VREF3) × 7/8
VREF3 + (VREF2 to VREF3) × 6/8
VREF3 + (VREF2 to VREF3) × 5/8
VREF3 + (VREF2 to VREF3) × 4/8
VREF3 + (VREF2 to VREF3) × 3/8
VREF3 + (VREF2 to VREF3) × 2/8
VREF3 + (VREF2 to VREF3) × 1/8
VREF3
VREF4 + (VREF3 to VREF4) × 7/8
VREF4 + (VREF3 to VREF4) × 6/8
VREF4 + (VREF3 to VREF4) × 5/8
VREF4 + (VREF3 to VREF4) × 4/8
VREF4 + (VREF3 to VREF4) × 3/8
VREF4 + (VREF3 to VREF4) × 2/8
VREF4 + (VREF3 to VREF4) × 1/8
VREF4
VREF5 + (VREF4 to VREF5) × 7/8
VREF5 + (VREF4 to VREF5) × 6/8
VREF5 + (VREF4 to VREF5) × 5/8
VREF5 + (VREF4 to VREF5) × 4/8
VREF5 + (VREF4 to VREF5) × 3/8
VREF5 + (VREF4 to VREF5) × 2/8
VREF5 + (VREF4 to VREF5) × 1/8
VREF5
Input
data
20h
21h
22h
23h
24h
25h
26h
27h
28h
29h
2Ah
2Bh
2Ch
2Dh
2Eh
2Fh
30h
31h
32h
33h
34h
35h
36h
37h
38h
39h
3Ah
3Bh
3Ch
3Dh
3Eh
3Fh
Formula for calculating output voltage
VREF6 + (VREF5 to VREF6) × 7/8
VREF6 + (VREF5 to VREF6) × 6/8
VREF6 + (VREF5 to VREF6) × 5/8
VREF6 + (VREF5 to VREF6) × 4/8
VREF6 + (VREF5 to VREF6) × 3/8
VREF6 + (VREF5 to VREF6) × 2/8
VREF6 + (VREF5 to VREF6) × 1/8
VREF6
VREF7 + (VREF6 to VREF7) × 7/8
VREF7 + (VREF6 to VREF7) × 6/8
VREF7 + (VREF6 to VREF7) × 5/8
VREF7 + (VREF6 to VREF7) × 4/8
VREF7 + (VREF6 to VREF7) × 3/8
VREF7 + (VREF6 to VREF7) × 2/8
VREF7 + (VREF6 to VREF7) × 1/8
VREF7
VREF8 + (VREF7 to VREF8) × 7/8
VREF8 + (VREF7 to VREF8) × 6/8
VREF8 + (VREF7 to VREF8) × 5/8
VREF8 + (VREF7 to VREF8) × 4/8
VREF8 + (VREF7 to VREF8) × 3/8
VREF8 + (VREF7 to VREF8) × 2/8
VREF8 + (VREF7 to VREF8) × 1/8
VREF8
VREF9 + (VREF8 to VREF9) × 6/7
VREF9 + (VREF8 to VREF9) × 5/7
VREF9 + (VREF8 to VREF9) × 4/7
VREF9 + (VREF8 to VREF9) × 3/7
VREF9 + (VREF8 to VREF9) × 2/7
VREF9 + (VREF8 to VREF9) × 1/7
VREF9
VREF10
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| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet MN838898.PDF ] | |
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