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mb_olre16 [2016/09/25 07:53]
antichambre [GrayScale Clock]
mb_olre16 [2019/04/21 08:50]
antichambre [GrayScale Clock]
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 **Frame update is needed only when a change occurs, TLC keep all the frame in memory and continue to distribute it to the 32 addresses lines and 16 rgb leds by address **  **Frame update is needed only when a change occurs, TLC keep all the frame in memory and continue to distribute it to the 32 addresses lines and 16 rgb leds by address ** 
 \\ \\
 +
  
 ==== GrayScale Clock ==== ==== GrayScale Clock ====
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 The TLC needs a GrayScale Clock(GSCLK) and additional control to multiplex 32 addresses (named COMSELx in diagram). The GSCLK signal should be 257 pulses + 1.5~2.5µs of interval between segments . COMSEL management needs 32 multiplexing adress lines for (5 bits coded and decoded directly on the top board).\\ The TLC needs a GrayScale Clock(GSCLK) and additional control to multiplex 32 addresses (named COMSELx in diagram). The GSCLK signal should be 257 pulses + 1.5~2.5µs of interval between segments . COMSEL management needs 32 multiplexing adress lines for (5 bits coded and decoded directly on the top board).\\
  
-=== Clock Schematic ===+=== Clock Schematic ​version 1 === 
 +\\ 
 +<wrap center round important 60%> 
 +//Note: This circuit is replaced by a simulated one, on a CPLD.// 
 +</​wrap>​
  
 {{:​antichambre:​tlc_gsclk.png?​800|}}\\ {{:​antichambre:​tlc_gsclk.png?​800|}}\\
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 ADDR_CLK is the multiplexed lines clock . It's used to gate the PWM signal and obtain the GSCLK and of course, as a clock for the ADDR Counter U5. The counter U5 provides the coded ADDR_x lines and an EOF(End Of Frame) when 32 is reached.\\ ADDR_CLK is the multiplexed lines clock . It's used to gate the PWM signal and obtain the GSCLK and of course, as a clock for the ADDR Counter U5. The counter U5 provides the coded ADDR_x lines and an EOF(End Of Frame) when 32 is reached.\\
  
 +
 +=== Clock version 2 ===
 +
 +<wrap center round todo 60%>
 +CPLD/FPGA version
 +</​wrap>​
  
  
mb_olre16.txt · Last modified: 2019/04/21 08:50 by antichambre