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ST92195C7B1 Datasheet(PDF) 9 Page - STMicroelectronics |
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ST92195C7B1 Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 249 page 9/249 ST92195C/D - GENERAL DESCRIPTION INTRODUCTION (Cont’d) 1.1.7 Teletext, VPS and WSS Data Slicers The three on-board data slicers using a single ex- ternal crystal are used to extract the Teletext, VPS and WSS information from the video signal. Hard- ware Hamming decoding is provided. 1.1.8 Voltage Synthesis Tuning Control 14-bit Voltage Synthesis using the PWM (Pulse Width Modulation)/BRM (Bit Rate Modulation) technique can be used to generate tuning voltages for TV set applications. The tuning voltage is out- put on one of two separate output pins. 1.1.9 PWM Output Control of TV settings can be made with up to eight 8-bit PWM outputs, with a maximum frequen- cy of 23,437Hz at 8-bit resolution (INTCLK = 12 MHz). Low resolutions with higher frequency oper- ation can be programmed. 1.1.10 Serial Peripheral Interface (SPI) The SPI bus is used to communicate with external devices via the SPI, or I²C bus communication standards. The SPI uses a single data line for data input and output. A second line is used for a syn- chronous clock signal. 1.1.11 Standard Timer (STIM) The ST92195C and ST92195D have one or two Standard Timer(s) that include a programmable 16-bit down counter and an associated 8-bit pres- caler with Single and Continuous counting modes. 1.1.12 I²C Bus Interface The ST92195D versions have one I²C bus inter- face. The I²C bus is a synchronous serial bus for connecting multiple devices using a data line and a clock line. Multimaster and slave modes are sup- ported. Up to two channels are supported. The I²C interface supports 7-bit addressing. It supports speeds of up to 800 KHz. Bus events (Bus busy, slave address recognised) and error conditions are automatically flagged in peripheral registers and interrupts are optionally generated. 1.1.13 Analog/Digital Converter (ADC) In addition there is a 4-channel Analog to Digital Converter with integral sample and hold, fast 5.75µs conversion time and 6-bit guaranteed reso- lution. |
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