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Renesas SH7781 User Manual

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19. Display Unit (DU)

Rev.1.00 Jan. 10, 2008 Page 897 of 1658

REJ09B0261-0100

Bit Bit

Name

Initial
Value R/W

Internal
Update Description

9, 8

PnCPSL

0

R/W

Yes

Plane n Color Palette Select

When the PnDDF bit is set to 8 bits/pixel,
specifies the color palette to be used.

00: Selects the color palette 1

01: Selects the color palette 2

10: Selects the color palette 3

11: Selects the color palette 4

7

PnDC

0

R/W

Yes

Plane n Display Area Change

Controls switching of the frame buffer in manual
display change mode.

0: In manual display change mode, switching of

the frame buffer for display is not performed.

1: In manual display change mode, switching of

the frame buffer for display is performed.
When the PnDC bit is 0, bit setting is possible.
Switching is performed in frame units.
After frame buffer switching (after vertical
blanking detection), this bit is cleared to 0.

6

⎯ 0

R

⎯ Reserved

This bit is always read as 0. The write value
should always be 0.

5, 4

PnBM

0

R/W

Yes

Plane n Buffer Mode

When set to manual display change mode or
auto display change mode (blinking mode),
double buffer control is performed using
PnDSA0R and PnDSA1R.

00: Manual display change mode

01: Setting prohibited

10: Auto display change mode (blinking mode)

11: Setting prohibited

3, 2

⎯ All

0

R

⎯ Reserved

These bits are always read as 0. The write value
should always be 0.

1, 0

PnDDF

0

R/W

Yes

Plane n Display Data Format

00: 8 bits/pixel

01: 16 bits/pixel

10: ARGB

11: YC (YUV422 is converted to RGB888)