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R61509V Target Spec
Rev. 0.11 April 25, 2008, page 128 of 181
Notes to RGB Interface Operation
1. The following functions are not available in RGB interface operation.
Table 64 Functions Not Available in RGB Interface operation
Function RGB Interface Internal Display Operation
Partial display Not available Available
Scroll function Not available Available
2. The VSYNCX, HSYNCX, and DOTCLK signals must be supplied during display period.
3. The reference clock to generate liquid crystal panel controlling signals in RGB interface operation is
DOTCLK, not the internal clock generated from the internal oscillator.
4. When switching between the internal operation mode and the external display interface operation mode,
follow the sequences below in setting instruction.
5. In RGB interface operation, front porch period continues after the end of frame period until next
VSYNCX input is detected.
6. RGB and 80-system bus interfaces cannot be used simultaneously.
7. In RGB interface operation, RAM address AD16-0 is set in the address counter every frame on the
falling edge of VSYNCX.
Internal Clock Operation to RGB Interface (1)
Operation via RGB interface
RGB Interface (1) to Internal Clock Operation
Internal clock operation
AM = 0
RAM address set
Set DM1-0 = 01 and RM = 1
for RGB interface
Write data to RAM
via RGB interface
Wait one frame period
or more
Set index register to R202h
Display operation in
synchronization with
internal clocks
RGB interface operation
Display operation in
synchronization with
VSYNCX, HSYNCX, and
DOTCLK
Display operation in
synchronization with VSYNCX,
HSYNCX, and DOTCLK
Internal clock operation
Set internal clock
operation mode*
(DM1-0 = 00 and RM = 0)
Display operation in
synchronization with
internal clocks
Note: Continue RGB interface signals at least for
one frame period after setting DM1-0, RM bits
to internal clock operation.
Note: Input the RGB interface signals before setting the DM1-0 and RM bits
to the RGB interface operation.
*Instruction setting for
the RGB interface operation
is enebled from the next frame period.
*Instruction setting to the
internal clock operation
is enebled from the next
frame period.
Wait one frame period
or more
Figure 49 RGB and Internal Clock Operation Mode Switching Sequences