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TLC5951 датащи(PDF) 9 Page - Texas Instruments |
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TLC5951 датащи(HTML) 9 Page - Texas Instruments |
9 / 46 page TLC5951 www.ti.com SBVS127B – MARCH 2009 – REVISED DECEMBER 2009 TERMINAL FUNCTIONS TERMINAL NO. NAME DAP RHA I/O DESCRIPTION Serial data input for the 288-bit common shift register for grayscale (GS), dot correction (DC), global brightness control (BC), and function control (FC) data. GSSIN 1 26 I GSSIN is connected to the LSB of the 288-bit common shift register. This pin is internally pulled to GND with a 500-k Ω resistor. Serial data shift clock for the 288-bit common shift register for GS/DC/BC/FC data. Data present on GSSIN are shifted into the LSB of the shift register with the rising GSSCK 2 27 I edge of GSSCK. Data in the shift register are shifted toward the MSB at each rising edge of GSSCK. The MSB data of the shift register appear on GSSOUT. Data in the 288-bit common shift register are copied to the GS data latch or to the DC/BC/FC data latch at the rising edge of GSLAT. The level of GSLAT at the last GSSCK before the GSLAT rising edge determines which of the two latches the data are transferred into. When GSLAT is low at the last GSSCK rising edge, all GSLAT 3 28 I 288 bits in the common shift register are copied to the GS data latch. When GSLAT is high at the last GSSCK rising edge, bits 0-198 are copied to the DC/BC/FC data latch and bits 199-215 are copied to the 216-bit DC/BC/FC/UD shift register. The GSLAT rising edge for a DC/BC/FC/UD data write must be input more than 7 ms after a data write through the DCSIN pin. Serial data output of the 288-bit common shift register. LED open detection (LOD), LED short detection (LSD), thermal error flag (TEF), and 199-bit data in the GSSOUT 19 5 O DC/BC/FC data latch can be read via GSSOUT. GSSOUT is connected to the MSB of the shift register. Data are clocked out at the rising edge of GSSCK. Serial data input for the 216-bit DC/BC/FC/UD shift register. DCSIN is connected DCSIN 38 25 I to the LSB of the shift register. Serial data shift clock for the 216-bit DC/BC/FC/UD shift register. Data present on DCSIN are shifted into the LSB of the shift register with the DCSCK rising edge. Data in the shift register are shifted toward the MSB at each DCSCK rising edge. DCSCK 37 24 I The MSB data of the register appear on DCSOUT. The 216-bit data in the shift register are automatically copied to DC/BC/FC/UD data latch 3 ms to 7 ms after the DCSCK rising edge is not input. Serial data output of the 216-bit shift register. DCSOUT is connected to the MSB of DCSOUT 20 6 O the shift register. Data are clocked out at the rising edge of DCSCK. Reference clock for the GS pulse width modulation (PWM) control for the RED GSCKR 5 30 I LED output group. When XBLNK is high, each GSCKR rising edge increments the RED LED GS counter for PWM control. Reference clock for the GS PWM control for the GREEN LED output group. When GSCKG 4 29 I XBLNK is high, each GSCKR rising edge increments the GREEN LED GS counter for PWM control. Reference clock for the GS PWM control for the BLUE LED output group. When GSCKB 6 31 I XBLNK is high, each GSCKR rising edge increments the BLUE LED GS counter for PWM control. When XBLNK is low, all constant-current outputs (OUTR0-OUTR7, OUTG0-OUTG7, OUTB0-OUTB7) are forced off. The grayscale counters for each color group are reset to '0', and the grayscale PWM timing controller is initialized. XBLNK 36 23 I When XBLNK is high, all constant current outputs are controlled by the grayscale PWM timing controller for each color LED. This pin is internally pulled to GND with a 500 k Ω resistor. A resistor connected between IREF and GND sets the maximum current for all IREF 34 21 I/O constant current outputs. Constant-current outputs for the RED LED group. These outputs are controlled with the GSCKR clock signal. 8, 11, 14, 2, 9, 12, 15, The RED LED group is divided into four subgroups: OUTR0/OUTR4, OUTR0- 17, 22, 25, 18, 33, 36, O OUTR1/OUTR5, OUTR2/OUTR6, and OUTR3/OUTR7. OUTR7 28, 31 39 Each paired output turns on/off with 24 ns (typ) time delay between other paired outputs. Multiple outputs can be tied together to increase the constant current capability. Different voltages can be applied to each output. Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s): TLC5951 |
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