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ST7LNB0 Folha de dados(PDF) 1 Page - STMicroelectronics |
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ST7LNB0 Folha de dados(HTML) 1 Page - STMicroelectronics |
1 / 22 page December 2004 1/22 Rev. 3.0 ST7LNB0 DiSEqC™ 2.1 Slave Microcontroller for LNBs and Switchers The ST7LNB0 is an 8-bit microcontroller dedicat- ed to DiSEqC™ slave operation in LNBs and switchers, it is compliant with the DiSEqC™ 2.1 level, also it supports backwards compatible (13/ 18 V, 22 kHz tone) and toneburst signalling. ■ Clock, Reset and Supply Management – Reduced power consumption. – Safe power on/off management by low volt- age detector (LVD). – Internal 8 MHz oscillator ■ Communication interface – One DiSEqC™ 2.1 communication interface ■ Analog interface – 13/18 V voltage detector – 22 KHz tone detector ■ I/O ports – 8 output ports for control of committed and un- committed switches – 1 output port for standby control Figure 1. ST7LNB0 Block Diagram Table 1. Device Summary SO16 150” Features ST7LNB0Y0M6 Packages SO16 150” Peripherals DiSEqC™ 2.1 communication interface, 22KHz tone detector, 13/18V detector Operating Voltage 4.5 V t0 5.5 V Temperature range -40°C to +85°C 8-BIT CORE ALU RESET 8 MHz. RC OSC Internal CLOCK CONTROL VSS POWER SUPPLY LVD VDD SWITCH PORTS DiSEqC™ 2.1 OP[8:1] SBY 22KHz tone Detector 13/18 V Detector DRX DTX 1 |
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