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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LPC804 датащи(PDF) 55 Page - NXP Semiconductors |
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LPC804 датащи(HTML) 55 Page - NXP Semiconductors |
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55 / 89 page  LPC804 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2021. All rights reserved. Product data sheet Rev. 2.0 — 21 September 2021 55 of 87 NXP Semiconductors LPC804 32-bit Arm Cortex-M0+ microcontroller [9] A Fast-mode I2C-bus device can be used in a Standard-mode I2C-bus system but the requirement tSU;DAT = 250 ns must then be met. This will automatically be the case if the device does not stretch the LOW period of the SCL signal. If such a device does stretch the LOW period of the SCL signal, it must output the next data bit to the SDA line tr(max) + tSU;DAT = 1000 + 250 = 1250 ns (according to the Standard-mode I2C-bus specification) before the SCL line is released. Also the acknowledge timing must meet this set-up time. Fig 26. I2C-bus pins clock timing aaa-004643 tf 70 % 30 % SDA tf 70 % 30 % S 70 % 30 % 70 % 30 % tHD;DAT SCL 1 / fSCL 70 % 30 % 70 % 30 % tVD;DAT tHIGH tLOW tSU;DAT |
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