r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 997

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

19.5.6
The display unit (DU) generates a CLAMP signal and DE signal, independent of the DISP signal
indicating the display interval.
The rising-edge start position and high-level width of the CLAMP signal and DE signal, with
reference to the HSYNC signal falling edge, can be set in dot clock units. Figure 19.20 shows the
timing chart.
However, the DE signal is fixed at low level during the vertical blanking interval.
When start position value is 0
When (start position value + high-level width value) exceeds the HSYNC period
DCLKOUT
(output)
HSYNC signal
CLAMP signal/
DE signal
CLAMP signal/
DE signal
CLAMP signal/
DE signal
CLAMP Signal and DE Signal
Figure 19.20 CLAMP Signal and DE Signal
Start position value
+ 1
Starting position value
+ 1
The minimum value of rising position = 1
High-level width value
High-level width value
Rev.1.00 Jan. 10, 2008 Page 967 of 1658
When the HSYNC
signal falls, the
CLAMP signal/DE
signal also falls.
19. Display Unit (DU)
REJ09B0261-0100