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LPC844 Datasheet(PDF) 97 Page - NXP Semiconductors |
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LPC844 Datasheet(HTML) 97 Page - NXP Semiconductors |
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97 / 97 page ![]() NXP Semiconductors LPC84x 32-bit Arm Cortex-M0+ microcontroller © NXP Semiconductors N.V. 2018. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 27 February 2018 Document identifier: LPC84x Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. 12.3 I/O pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 12.4 WKTCLKIN pin (wake-up clock input) . . . . . . 61 12.5 SCTimer/PWM output timing . . . . . . . . . . . . . 61 12.6 I2C-bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 12.7 SPI interfaces . . . . . . . . . . . . . . . . . . . . . . . . . 64 12.8 USART interface. . . . . . . . . . . . . . . . . . . . . . . 67 12.9 Wake-up process . . . . . . . . . . . . . . . . . . . . . . 68 13 Characteristics of analog peripherals . . . . . . 69 13.1 BOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 13.2 ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 13.2.1 ADC input impedance. . . . . . . . . . . . . . . . . . . 72 13.3 Comparator and internal voltage reference . . 73 13.4 DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 14 Application information. . . . . . . . . . . . . . . . . . 76 14.1 Start-up behavior . . . . . . . . . . . . . . . . . . . . . . 76 14.2 XTAL oscillator . . . . . . . . . . . . . . . . . . . . . . . . 77 14.2.1 XTAL Printed Circuit Board (PCB) design guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 14.2.2 XTAL input . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 14.3 Connecting power, clocks, and debug functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 14.4 I/O power consumption. . . . . . . . . . . . . . . . . . 80 14.5 Termination of unused pins. . . . . . . . . . . . . . . 80 14.6 Pin states in different power modes . . . . . . . . 81 15 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 82 16 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 17 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 92 18 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 19 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 93 20 Legal information. . . . . . . . . . . . . . . . . . . . . . . 94 20.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 94 20.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 20.3 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 20.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 95 21 Contact information. . . . . . . . . . . . . . . . . . . . . 95 22 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 |
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