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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MCP9804-E/MS датащи(PDF) 5 Page - Microchip Technology |
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MCP9804-E/MS датащи(HTML) 5 Page - Microchip Technology |
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5 / 52 page  © 2009-2012 Microchip Technology Inc. DS22203C-page 5 MCP9804 TIMING DIAGRAM SENSOR SERIAL INTERFACE TIMING SPECIFICATIONS Electrical Specifications: Unless otherwise indicated, V DD= 2.7V to 5.5V, TA = -40°C to +125 °C, GND = Ground and CL = 80 pF (Note 1). (Note 6) Parameters Sym Min Max Min Max Units Conditions 2-Wire SMBus/I2C Interface Serial port frequency fSCL 0100 0 400 kHz ( Note 2, Note 4) Low Clock tLOW 4700 — 1300 —ns ( Note 2) High Clock tHIGH 4000 — 600 —ns ( Note 2) Rise Time tR — 1000 20 300 ns Fall Time tF 20 300 20 300 ns Data in Setup Time tSU-DI 250 — 100 —ns ( Note 3) Data in Hold Time tHD-DI 0— 0 —ns (Note 5) Data out Hold Time tHD-DO 300 — 200 900 ns (Note 4) Start Condition Setup Time tSU-START 4700 — 600 —ns Start Condition Hold Time tHD-START 4000 — 600 —ns Stop Condition Setup Time tSU-STOP 4000 — 600 —ns Bus Free tB-FREE 4700 — 1300 —ns Time-out tOUT 25 50 25 50 ms Bus Capacitive load Cb —— — 400 pf Note 1: All values referred to VIL MAX and VIH MIN levels. 2: If tLOW > tOUT or tHIGH > tOUT, the temperature sensor I 2C interface will time-out. A Repeat Start command is required for communication. 3: This device can be used in a Standard-mode I2C-bus system, but the requirement tSU:DI MIN must be met. This device does not stretch SCL Low time. 4: As a transmitter, the device provides internal minimum delay time tHD:DO MIN, to bridge the undefined region of the falling edge of SCL tF MAX to avoid unintended generation of Start or Stop conditions. 5: As a receiver, SDA should not be sampled at the falling edge of SCL. SDA can transition tHD:DI after SCL toggles Low. 6: The I2C Fast Mode specification, or timing for bus frequency up to 400KHz, applies to devices starting with date code of 1145. tSU-START tHD-START tSU-DI tSU-STOP tB-FREE SCL SDA tHD-DI/tHD-DO tHIGH tLOW tOUT tR, tF START Condition Data Transmission STOP Condition |
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