DM11C SITI [Silicon Touch Technology Inc.], DM11C Datasheet - Page 14

• Manufacturer Part Number: DM11C
• Description: 8-bit Constant Current LED Driver with Error Detection
• Manufacturer: SITI [Silicon Touch Technology Inc.]

Real-time monitor
serial-out then compare with the last frame data one by one. Once there is any discrepancy
(‘1’ ‘0’), we can locate which channel is abnormal precisely. Since the process is ongoing and
without shifting between image mode and detection mode, it does not interrupt the image data flow
and the output display. The ‘real-time monitor’ method is suitable for LED Variable Message Signs
(VMS) system.
Clocks calculation
because it needs to compare the retrieved information with a lot of frame data. Therefore, to write
the image data of all channels to ‘1’, all failure status will be identified when there will be any ‘0’
retrieved. By calculating the numbers of clock pulses, the locations of abnormal channel could be
pointed out easily. The “clocks calculation” method helps to minimize the loading and memory
resources of system.
Selection of Open/Short Detection
could switch LED open to short detection (or short to open detection) by following timing sequence.
There are two alternative options could be selected. The option 1 shows triggering latch pulse when
the last clock of the frame data kept at high level. The option 2 shows sending one useless clock
pulse which will not shift-in data while the latch signal is kept at high level.
8-bit Constant Current LED Driver with Error Detection
With the above operating principle, system could continuously retrieve LED status from
For large LED display applications, ‘real-time monitor’ could be a heavy loading for system
The default detection type provided by DM11C is LED open detection after power-on. Users
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SILICON TOUCH TECHNOLOGY INC
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.
Open
Short
or
Open
Short
useless clock pulse does not shift-in data
Version:A.002
DM11C
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