ViewSonic Corporation
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4. Circuit Description
The TSUM57AK is total solution graphics processing IC for LCD monitors with panel resolutions up to
SXGA. It is configured with a high-speed integrated triple-ADC/PLL, an integrated DVI receiver, a high
quality display processing engine, and an integrated output display interface that can support RSDS panel
interface format. To further reduce system costs, the TSUM57AK also integrates intelligent power
management control capability for green-mode requirements and spread- spectrum support for EMI
management.
The TSUM57AK incorporates the world’s first coherent oversampled RGB graphics ADC in a monitor
controller system. The oversampling ADC samples the input RGB signals at a frequency that is much
higher than the signal source pixel rate. This can preserve details in the video signal that ordinarily would
be lost due to input signal jitter or bandwidth limitations in non-oversampled systems. The TSUM57AK
also incorporates a new Dynamic Frame Rate (DFR) generator for the digital output video to the display
panel that preserves the advantages of a fixed output clock rate, while eliminating the output end of frame
short-line.
VG2021m-1
Confidential - Do Not Copy