UPD161831 Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD161831

240/244-OUTPUT TFT-LCD SOURCE DRIVER WITH TIMING GENERATOR (COMPATIBLE WITH 64-GRAY SCALES)

NEC => Renesas Technology 

µPD161831

4.2.2 65,536/262,144 color select register

This register is used to select the number of colors (65,536 or 262,144 colors) of one pixel and specify the data

transfer mode when 262,144 colors are selected.

If transferring 262,144 colors twice is selected, the time required to transfer the data of one pixel is two times longer

than that of the first transfer (if the dot clock frequency is the same). To make the frame frequency for the first

transfer and the second transfer the same, therefore, increase the dot clock frequency for the second transfer to

twice that of the first transfer.

Note also that the setting of this register is reflected from the operation of the next frame after the register is set.

Table 4−3. 65,536/262,144 Color Select Register (R0)

Register Set Value

00H

01H Note

02H Note

03H

04H-FFH

Function

65,536 colors: 16-bit data is transferred once

262,144 colors: 12-bit and 6-bit data are transferred twice.

262,144 colors: 9-bit and 9-bit data are transferred twice.

262,144 colors: 18-bit data is transferred once

Use prohibited

Note The 65,536/262,144 color select register cannot be used in mode that do not use the timing generator.

The relationship between each data transfer mode and the display data input pins (D05 to D00, D15 to D10, and D25 to

D20) is shown in the table below. The data input to D05 to D00 is output during the period while BSW_O is active, and

the data input to D25 to D20 is output during the period while RSW_O is active.

However, Red5, Green5, Blue5 in table 4−4 are the data lines needed to input in 8-color mode.

Table 4−4. Relationship Between Data Transfer Mode and Display Data Input Pins (“−” indicates that input

data is invalid)

Display Data

Input Pin

D25

D24

D23

D22

D21

D20

D15

D14

D13

D12

D11

D10

D05

D04

D03

D02

D01

D00

65,536 Colors

Red5

Red4

Red3

Red2

Red1

− Note

Green5

Green4

Green3

Green2

Green1

Green0

Blue5

Blue4

Blue3

Blue2

Blue1

− Note

One transfer,

18-bit

Red5

Red4

Red3

Red2

Red1

Red0

Green5

Green4

Green3

Green2

Green1

Green0

Blue5

Blue4

Blue3

Blue2

Blue1

Blue0

262,144 Colors

Two transfers, 12-bit + 6-bit

First transfer Second transfer

Red5

Red4

Red3

Red2

Red1

−

Red0

−

−

Green5

Green4

Green3

Green2

Green1

Green0

−

−

−

Blue5

Blue4

Blue3

Blue2

Blue1

−

Blue0

−

−

−

−

−

−

−

−

−

−

−

Two transfers, 9-bit + 9-bit

First transfer Second transfer

Red5

Green2

Red4

Green1

Red3

Green0

Red2

Blue5

Red1

−

Blue4

−

Red0

Blue3

Green5

Blue2

Green4

Blue1

Green3

−

−

−

−

−

−

−

−

Blue0

−

−

−

−

−

−

−

−

Note It is not necessary to input data to the D20 and D00 pins when 65,536 colors are selected, but amplifier output is

performed on the assumption that data input to D25 and D05 is input to D20 and D00.

Preliminary Product Information S16269EJ2V0PM

17

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