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PD16721 Fiches technique(PDF) 7 Page - Renesas Technology Corp

No de pièce PD16721
Description  384-OUTPUT TFT-LCD SOURCE DRIVER (COMPATIBLE WITH 256-GRAY SCALES)
Download  30 Pages
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Fabricant  RENESAS [Renesas Technology Corp]
Site Internet  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

PD16721 Fiches technique(HTML) 7 Page - Renesas Technology Corp

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DataSheet S14791EJ1V0DS
5
µµµµPD16721
(2/2)
Pin Symbol
Pin Name
I/O
Description
MODE
Output reset control
I
MODE = H or open: Output reset
MODE = L: No output reset
MODE is pulled up to the VDD1 in the LSI.
POL21,
POL22
Data inversion
I
Select of inversion or no inversion for input data.
POL21: Data inversion or no inversion of Port1.
POL22: Data inversion or no inversion of Port2
POL21/22 = H: Data are inverted in the LSI.
POL21/22 = L: Data are not inverted in the LSI.
VSEL
Driver voltage select
I
The driver voltage can be switched by controlling the stationary bias
current of the output amplifier via VSEL.
VSEL = H: VDD2 = 13.0 V (large bias current)
VSEL = L or open: VDD2 = 15.0 V (small bias current)
LPC is pulled down to the VSS1 in the LSI.
V0 to V15
γ -corrected power supplies
Input the
γ -corrected power supplies from outside by using operational
amplifier. During the gray scale voltage output, be sure to keep the gray
scale level power supply at a constant level. Make sure to maintain the
following relationships.
VDD2–0.2 V
≥ V0 > V1 > V2 > ....... > V6 > V7 ≥ 0.5 VDD2 + 0.5 V
0.5 VDD2–0.5 V
≥ V8 > V9 > V10 > ....... V14 > V15 ≥ VSS2 + 0.2 V
TEST
Test
I
Normally, set the TEST pin to high level or leave open.
This pin is pulled up to VDD1 in the LSI.
VDD1
Logic power supply
2.5 to 3.4 V
VDD2
Driver power supply
13.0
± 0.5 V or 15.0 ± 0.5 V
VSS1
Logic ground
Grounding
VSS2
Driver ground
Grounding
Cautions 1. The power start sequence must be VDD1, logic input, and VDD2 & V0 to V15 in that order.
Reverse this sequence to shut down.
2. To stabilize the supply voltage, please be sure to insert a 0.47
µµµµF bypass capacitor between
VDD1 to VSS1 and VDD2 to VSS2. Furthermore, for increased precision of the D/A converter,
insertion of a bypass capacitor of about 0.1
µµµµF is also advised between the γγγγ-corrected
power supply terminals (V0, V1, V2,....., V15) and VSS2.
5
5


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