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TDA9210 Fiches technique(PDF) 4 Page - STMicroelectronics |
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TDA9210 Fiches technique(HTML) 4 Page - STMicroelectronics |
4 / 19 page TDA9210 4/19 Additionally, the IC automatically works with either positive or negative HSYNC pulses. – When bit 0 is set to 1, BPCP is synchronized on the leading edge of the blanking pulse BLK (Pin 20). One can use a positive or negative blanking pulse by programming bit 0 in Register 9 (See I 2C Table 3). – BPCP width can be adjusted with bit 2 and 3 (see Register 8, I2C table 2). – If the application already provides the Back Porch Clamping Pulse, bit 4 must be set to 1 (providing a direct connection between Pin 19 and internal BPCP). 4.2 - Synchro Clipping Function This function is available on channel 2 (Green Channel). When using the Sync On Green (SOG) (Synchro pulse included in the green channel in- put) the synchro clipping function must be activat- ed (bit 7 set to 1 in register 9) in order to keep the right green output levels and avoid unbalanced colours. 4.3 - Blanking Input The Blanking pin (FBLK) is TTL compatible. The Blanking pulse can be: – positive or negative – line or Composite-type (but not Frame-type). 4.4 - Contrast Adjustment (8 bits) The contrast adjustment is made by controlling si- multaneously the gain of the three internal amplifi- ers through the I2C bus interface. Register 1 al- lows the adjustment in a range of 48 dB. Figure 1. 4.5 - ABL Control The TDA9210 includes an ABL (automatic beam limitation) input to attenuate the RGB Video sig- nals depending on the beam intensity. The operating range is 2 V (from 3 V to 1 V). A typ- ical 15 dB maximum attenuation is applied to the output signal whatever the contrast adjustment is. (See Figure 2 ). When the ABL feature is not used, the ABL input (Pin 2) must be connected to a 5 V supply voltage. R8b0=0 and R8b1=0 HSYNC/BPCP (Pin19) Internal BPCP R8b0=0 and R8b1=1 HSYNC/BPCP (Pin19) Internal BPCP R8b0=1 BLK (Pin20) Internal BPCP R8b4 =1 HSYNC/BPCP (Pin19) Internal BPCP |
Numéro de pièce similaire - TDA9210 |
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Description similaire - TDA9210 |
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