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NCN49597MNG Datasheet(PDF) 10 Page - ON Semiconductor |
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NCN49597MNG Datasheet(HTML) 10 Page - ON Semiconductor |
10 / 29 page NCN49597 http://onsemi.com 10 Table 5. ELECTRICAL CHARACTERISTICS All parameters are valid for TJ = −40°C to 125°C, VDD = 3.3 V, fCLK = 48 MHz ± 50 ppm unless otherwise specified. Parameter Unit Max Typ Min Symbol Test Conditions DIGITAL INPUTS WITH PULL−DOWN: TDI, TMS, TCK, TRSTB, TEST, SEN, IO8, IO9 Low input level (Note 26) VIL 0.2 VDD V High input level (Note 26) VIH 0.8 VDD V Pull−down resistor (Note 26) Measured at VPin = VDD / 2 RPU 35 100 170 k W DIGITAL SCHMITT TRIGGER INPUTS: RXD, RESB, IO0..IO7, SDI Rising threshold level (Note 27) VT+ 0.80 VDD V Falling threshold level (Note 27) VT− 0.2 VDD V Input leakage current (Note 27) ILEAK −2 2 mA BOOT LOADER TIMING (Parameters are valid for a baud rate of 115’200) (Note 28) IO2 setup time to falling edge of RESB (Note 29) t2s 5 ms Boot loader startup time (Notes 29 and 30) tstx 135 200 ms Inter−byte timeout sent to modem (Note 29) tIB 20 ms Boot loader acknowledgement after last byte correctly received (Note 29) tACK 3.6 12 ms IO2 hold time after start of acknowl- edgement byte transmission (Note 29) t2h 36 ms 26. For IO8 and IO9, this parameter only applies if the pin is configured as input pin by the firmware. 27. For IO0 …IO7, this parameter only applies if the pin is configured as input pin by the firmware. 28. The timing constraints governing the boot loader when uploading firmware over the serial interface are illustrated in Figure 3. 29. These parameters will not be measured in production as the performance is determined by a digital circuit. 30. This parameter is specified with the oscillator stable. Refer to Tstartup for oscillator startup information. Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. Figure 3. Timing Constraints for Uploading the Firmware over the Serial Communication Interface (SCI) IO2 TXD RXD STX ACK RESB tACK t2h t2s AAH tstx tds tIB |
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