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STPM098C 数据表(PDF) 94 Page - STMicroelectronics |
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STPM098C 数据表(HTML) 94 Page - STMicroelectronics |
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94 / 110 page  Symbol Parameter Test condition Min Typ Max Unit Notes PMBus™_thdsta Hold time after (REPEATED) START condition 0.6 - - μs After this period the first clock is generated. REPEATED START condition setup time 0.6 - - μs - PMBus™_tsusto STOP condition setup time 0.6 - - μs - PMBus™_thddat Data hold time 300 - - ns - PMBus™_tsudat Data setup time 100 - - ns - PMBus™_timeout Detect clock low timeout 25 - 35 ms - PMBus™_tlow Clock low period 1.3 - - μs - PMBus™_thigh Clock high period 0.6 - 50 μs - PMBus™_tlowsext Cumulative clock low extend time (target device) - - 25 ms - PMBus™_tlowmext Cumulative clock low extend time (controller device) - - 10 ms - PMBus™_tf Clock/data fall time 20 - 300 ns - PMBus™_tr Clock/data rise time 20 - 300 ns - PMBus™_tspike Noise spike suppression time - - - ns - 3.15.1.2 Network layer Target address assignment STPM098C PMBus™ target address assignment can be defined through pin SM_ADDR by applying a defined voltage. SM_ADDR input voltage is digitized by a dedicated ADC and encoded in a 7-bit word among 8 possible addresses. Note: SM_ADDR voltage is supposed to be programmed by means of a resistive partition from the VCC reference line. According to this concept target Address programming resistances can be retrieved by solving the following equations in sequence: 1. Total resistance → RTOT=RADDRH+RADDRL= VCCIVCCMAX Where Ivcc_max is the maximum current allowed to be sunk from VCC by resistive partition. 2. Partition factor → α=RADDRH RADDRL = VCCSMADDR−1 Where SM_ADDR is the desired voltage at SM_ADDR pin. Table 76. SM_ADDR voltage ADC electrical characteristics Symbol Parameter Test condition Min Typ Max Unit Notes ADC input ADDR_adc_range ADDR ADC voltage input range 0 - 5 V - ADDR_adc_ic ADDR ADC input current SM_ADDR = 5 V 20 30 40 μA - ADC input resolution ADDR _adc_resolution ADDR ADC resolution - 10 - bits Application information ADDR_adc_lsb ADDR ADC LSB - 5.3 - mV Application information ADC input accuracy ADDR_adc_total_err ADDR ADC total error -60 - 60 mV - ADC input dynamic characteristics ADDR_adc_in_sr ADDR ADC sample rate CLK_SSM_EN = 0 - 10 - MHz Application information ADDR_adc_latency ADDR ADC conversion latency - 65 100 μs Application information STPM098C Functional description DS14440 - Rev 1 page 94/110 |
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