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dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04 FIGURE 31-24: I2Cx BUS START/STOP BITS TIMING CHARACTERISTICS (SLAVE MODE) SCLx SDAx IS31 IS30 IS33 Start Condition FIGURE 31-25: I2Cx BUS DATA TIMING CHARACTERISTICS (SLAVE MODE) SCLx SDAx In SDAx Out IS30 IS20 IS11 IS10 DS70291E-page 382 © 2011 Microchip Technology Inc. IS34 Stop Condition IS26 IS31 IS25 IS33 IS21 IS40 IS40 IS45
dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04 TABLE 31-41: I2Cx BUS DATA TIMING REQUIREMENTS (SLAVE MODE) Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated) AC CHARACTERISTICS Operating temperature Extended -40°C ≤ TA ≤ +85°C for Industrial -40°C ≤ TA ≤ +125°C for Param. Symbol Characteristic Min Max Units Conditions IS10 TLO:SCL Clock Low Time 100 kHz mode 4.7 — μs Device must operate at a minimum of 1.5 MHz 400 kHz mode 1.3 — μs Device must operate at a minimum of 10 MHz 1 MHz mode (1) 0.5 — μs — IS11 THI:SCL Clock High Time 100 kHz mode 4.0 — μs Device must operate at a minimum of 1.5 MHz 400 kHz mode 0.6 — μs Device must operate at a minimum of 10 MHz 1 MHz mode (1) 0.5 — μs — IS20 TF:SCL SDAx and SCLx Fall Time IS21 TR:SCL SDAx and SCLx Rise Time IS25 TSU:DAT Data Input Setup Time IS26 THD:DAT Data Input Hold Time IS30 TSU:STA Start Condition Setup Time IS31 THD:STA Start Condition Hold Time IS33 TSU:STO Stop Condition Setup Time IS34 THD:ST O Stop Condition Hold Time 100 kHz mode — 300 ns CB is specified to be from 400 kHz mode 20 + 0.1 CB 300 ns 10 to 400 pF 1 MHz mode (1) — 100 ns 100 kHz mode — 1000 ns CB is specified to be from 400 kHz mode 20 + 0.1 CB 300 ns 10 to 400 pF 1 MHz mode (1) — 300 ns 100 kHz mode 250 — ns — 400 kHz mode 100 — ns 1 MHz mode (1) 100 — ns 100 kHz mode 0 — μs — 400 kHz mode 0 0.9 μs 1 MHz mode (1) 0 0.3 μs 100 kHz mode 4.7 — μs Only relevant for Repeated Start condition 400 kHz mode 0.6 — μs 1 MHz mode (1) 0.25 — μs 100 kHz mode 4.0 — μs After this period, the first clock pulse is generated 400 kHz mode 0.6 — μs 1 MHz mode (1) 0.25 — μs 100 kHz mode 4.7 — μs — 400 kHz mode 0.6 — μs 1 MHz mode (1) 0.6 — μs 100 kHz mode 4000 — ns — 400 kHz mode 600 — ns 1 MHz mode (1) 250 ns IS40 TAA:SCL Output Valid 100 kHz mode 0 3500 ns — From Clock 400 kHz mode 0 1000 ns 1 MHz mode (1) 0 350 ns IS45 TBF:SDA Bus Free Time 100 kHz mode 4.7 — μs Time the bus must be free 400 kHz mode 1 MHz mode 1.3 — μs before a new transmission can start (1) 0.5 — μs IS50 CB Bus Capacitive Loading — 400 pF — Note 1: Maximum pin capacitance = 10 pF for all I2Cx pins (for 1 MHz mode only). © 2011 Microchip Technology Inc. DS70291E-page 383
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