FEDL86V7666-01
OKI Semiconductor
Output block:
ML86V7666
The output block performs output timing adjustment, picture sizing, output format conversion, and other types of
output conversion.
• Pixel Count Correction Function
This function uses the internal FIFO to correct the total number of pixels in a line. It corrects the 1-line
sampling error generated when in asynchronous sampling mode or PLL synchronization is lost, and fixes the
pixel count for a line within the active screen. Refer to Active Pixel Timing for more on the pixel count for one
line.
# Related registers: $03/MRD[7:6], $16/OMRB
In the FIFO mode, register $03/MRD[7:6] can be set to bypass the FIFO.
MRD[7:6] = 00: FIFO-1 mode * (default)
Uses the internal FIFO to output data with the pixel count for 1H in the active screen as
the reference value.
MRD[7:6] = 01: FIFO-2 mode *
Uses the internal FIFO to set and output the pixel count per 1H as the reference value.
The internal processing method is different from the FIFO-1 mode. This mode is
effective for non-standard signals.
MRD[7:6] = 10: FIFO through mode
This mode does not use the internal FIFO for pixel count correction, but outputs the
decoded input signal as it is.
MRD[7:6] = 11: Undefined
• Scaling Function
This function shrinks the screen (fixed value).
Scaling
This function converts the input image to 1/4, 1/9, or 1/16 size for output.
Field memory control signals (pin 77 SCALW and pin 78 SCALR) are provided, so in connection with the Oki
4M-FIFO, a sub-screen can be output at any location on the screen.
# Related registers: $1A/SCR, $1B/SCVPR, and $1C/SCHPR
QVGA output
This function performs QVGA conversion where the operating clock was used in the Square Pixel mode.
QVGA data is output by decimating the pixels.
# Related register: $18/OMRD
• Gamma Correction Function
This function, which is only effective for RGB output, corrects gamma as part of the correction of monitor
characteristics.
Five stages can be selected in an internal register.
# Related register: $18/OMRD
• Output Format Conversion Function
This function converts the output data to the desired output format.
The following output formats are possible.
# Related registers: $00/MRA, $02/MRC, $03/MRD, $10/CHRCB, $18/OMRD, and $1A/SCR
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