NUC126VG4AE

NUC126 ARM CORTEX® -M 32-BIT MICROCONTROLLER NuMicro® Family NUC126 Series Datasheet Nuvoton is providing this document only for reference purposes of NuMicro microcontroller based system design. Nuvoton assumes no responsibility for errors or omissions. All data and specifications are subject to change without notice. For additional information or questions, please contact: Nuvoton Technology Corporation. www.nuvoton.com Aug. 08, 2018 Page 1 of 140 Rev 1.04 NUC126 SERIES DATASHEET The information described in this document is the exclusive intellectual property of Nuvoton Technology Corporation and shall not be reproduced without permission from Nuvoton. NUC126 TABLE OF CONTENTS 1 GENERAL DESCRIPTION ................................................................................. 8 1.1 2 Key Feature and Application......................................................................................... 9 FEATURES ....................................................................................................... 10 ® 2.1 3 NuMicro NUC126 Features ....................................................................................... 10 ABBREVIATIONS ............................................................................................ 18 3.1 4 Abbreviations .............................................................................................................. 18 PARTS INFORMATION LIST AND PIN CONFIGURATION ............................ 20 ® 4.1 NuMicro NUC126 Selection Guide ........................................................................... 20 4.1.1 4.1.2 4.2 Pin Configuration ........................................................................................................ 22 4.2.1 4.2.2 4.2.3 4.2.4 4.3 NUC126 USB Series QFN48 Pin Diagram .................................................... 22 NUC126 USB Series LQFP48 Pin Diagram ................................................... 23 NUC126 USB Series LQFP64 Pin Diagram ................................................... 24 NUC126 USB Series LQFP100 Pin Diagram ................................................. 25 NUC126 USB Series Pin Description ............................................................................. 26 GPIO Multi-function Pin Summary ................................................................................. 41 BLOCK DIAGRAM ........................................................................................... 53 ® 5.1 6 ® NuMicro ® NuMicro ® NuMicro ® NuMicro Pin Description ............................................................................................................ 26 4.3.1 4.3.2 5 ® NuMicro NUC126 Naming Rule ................................................................................... 20 ® NuMicro NUC126 USB Series (M452 Compatible) Selection Guide ............................ 21 NuMicro NUC126 Block Diagram ............................................................................. 53 FUNCTIONAL DESCRIPTION ......................................................................... 54 NUC126 SERIES DATASHEET ® ® 6.1 ARM Cortex -M0 Core .............................................................................................. 54 6.2 System Manager ......................................................................................................... 56 6.2.1 6.2.2 6.2.3 6.2.4 6.2.5 6.2.6 6.2.7 6.2.8 6.2.9 6.2.10 6.2.11 6.2.12 6.3 Overview ........................................................................................................................ 56 System Reset................................................................................................................. 56 Power Modes and Wake-up Sources ............................................................................. 63 System Power Distribution ............................................................................................. 66 System Memory Map ..................................................................................................... 68 SRAM Memory Orginization ........................................................................................... 70 Register Lock ................................................................................................................. 71 Auto Trim ....................................................................................................................... 71 UART1_TXD modulation with PWM............................................................................... 72 Voltage Detector (VDET) ............................................................................................... 73 System Timer (SysTick) ................................................................................................. 74 Nested Vectored Interrupt Controller (NVIC) .................................................................. 75 Clock Controller .......................................................................................................... 78 6.3.1 6.3.2 6.3.3 6.3.4 6.3.5 Aug. 08, 2018 Overview ........................................................................................................................ 78 System Clock and SysTick Clock ................................................................................... 81 Peripherals Clock ........................................................................................................... 82 Power-down Mode Clock ............................................................................................... 83 Clock Output .................................................................................................................. 83 Page 2 of 140 Rev 1.04 NUC126 6.4 Flash Memeory Controller (FMC) ............................................................................... 85 6.4.1 6.4.2 6.5 Overview ........................................................................................................................ 85 Features ......................................................................................................................... 85 Analog Comparator Controller (ACMP) ...................................................................... 86 6.5.1 6.5.2 6.6 Overview ........................................................................................................................ 86 Features ......................................................................................................................... 86 Analog-to-Digital Converter (ADC) ............................................................................. 87 6.6.1 6.6.2 6.7 Overview ........................................................................................................................ 87 Features ......................................................................................................................... 87 CRC Controller (CRC) ................................................................................................ 88 6.7.1 6.7.2 6.8 Overview ........................................................................................................................ 88 Features ......................................................................................................................... 88 External Bus Interface (EBI) ....................................................................................... 89 6.8.1 6.8.2 6.9 Overview ........................................................................................................................ 89 Features ......................................................................................................................... 89 General Purpose I/O (GPIO) ...................................................................................... 90 6.9.1 6.9.2 6.10 Overview ........................................................................................................................ 90 Features ......................................................................................................................... 90 Hardware Divider (HDIV) ............................................................................................ 91 6.10.1 Overview ........................................................................................................................ 91 6.10.2 Features ......................................................................................................................... 91 6.10.3 Blcok Diagram................................................................................................................ 91 2 6.11 2 I C Serial Interface Controller (I C) ............................................................................. 92 6.11.1 Overview ........................................................................................................................ 92 6.11.2 Features ......................................................................................................................... 92 PDMA Controller (PDMA) ........................................................................................... 93 6.12.1 Overview ........................................................................................................................ 93 6.12.2 Features ......................................................................................................................... 93 6.13 PWM Generator and Capture Timer (PWM) .............................................................. 94 6.13.1 Overview ........................................................................................................................ 94 6.13.2 Features ......................................................................................................................... 94 6.14 Real Time Clock (RTC) ............................................................................................... 96 6.14.1 Overview ........................................................................................................................ 96 6.14.2 Features ......................................................................................................................... 96 6.15 Smart Card Host Interface (SC).................................................................................. 97 6.15.1 Overview ........................................................................................................................ 97 6.15.2 Features ......................................................................................................................... 97 6.16 Serial Peripheral Interface (SPI) ................................................................................. 98 6.16.1 Overview ........................................................................................................................ 98 6.16.2 Features ......................................................................................................................... 98 6.17 Timer Controller (TMR) ............................................................................................... 99 6.17.1 Overview ........................................................................................................................ 99 6.17.2 Features ......................................................................................................................... 99 6.18 Aug. 08, 2018 USB Device Controller (USBD) ................................................................................ 101 Page 3 of 140 Rev 1.04 NUC126 SERIES DATASHEET 6.12 NUC126 6.18.1 Overview ...................................................................................................................... 101 6.18.2 Features ....................................................................................................................... 101 USCI – Universal Serial Control Interface Controller................................................ 102 6.19 6.19.1 Overview ...................................................................................................................... 102 6.19.2 Features ....................................................................................................................... 102 USCI – UART Mode ................................................................................................. 103 6.20 6.20.1 Overview ...................................................................................................................... 103 6.20.2 Features ....................................................................................................................... 103 USCI – SPI Mode ..................................................................................................... 104 6.21 6.21.1 Overview ...................................................................................................................... 104 6.21.2 Features ....................................................................................................................... 104 2 USCI – I C Mode ...................................................................................................... 106 6.22 6.22.1 Overview ...................................................................................................................... 106 6.22.2 Features ....................................................................................................................... 106 6.23 UART Interface Controller (UART) ........................................................................... 107 6.23.1 Overview ...................................................................................................................... 107 6.23.2 Features ....................................................................................................................... 107 6.24 Watchdog Timer (WDT) ............................................................................................ 108 6.24.1 Overview ...................................................................................................................... 108 6.24.2 Features ....................................................................................................................... 108 6.24.3 Clock Control ............................................................................................................... 108 6.25 Window Watchdog Timer (WWDT)........................................................................... 109 6.25.1 Overview ...................................................................................................................... 109 6.25.2 Features ....................................................................................................................... 109 6.25.3 Clock Control ............................................................................................................... 109 NUC126 SERIES DATASHEET 7 APPLICATION CIRCUIT ................................................................................ 110 8 ELECTRICAL CHARACTERISTICS .............................................................. 111 8.1 Absolute Maximum Ratings ...................................................................................... 111 8.2 DC Electrical Characteristics .................................................................................... 112 8.3 AC Electrical Characteristics .................................................................................... 120 8.3.1 8.3.2 8.3.3 8.3.4 8.3.5 External 4~24 MHz High Speed Crystal (HXT) Input Clock ......................................... 120 External 4~24 MHz High Speed Crystal (HXT) Oscillator ............................................ 120 External 32.768 kHz Low Speed Crystal (LXT) Input Clock ......................................... 121 External 32.768 kHz Low Speed Crystal (LXT) Input Clock ......................................... 122 Internal 48 MHz High Speed RC Oscillator (HIRC48) .................................................. 123 8.3.6 8.3.7 Internal 22.1184 MHz High Speed RC Oscillator (HIRC) ............................................. 123 Internal 10 kHz Low Speed RC Oscillator (LIRC) ........................................................ 123 8.4 Analog Characteristics .............................................................................................. 125 8.4.1 8.4.2 8.4.3 8.4.4 8.4.5 8.4.6 Aug. 08, 2018 LDO.............................................................................................................................. 125 Temperature Sensor .................................................................................................... 125 Internal Voltage Reference (Int_VREF) .......................................................................... 125 Power-on Reset ........................................................................................................... 126 Low-Voltage Reset ....................................................................................................... 126 Brown-out Detector ...................................................................................................... 126 Page 4 of 140 Rev 1.04 NUC126 8.4.7 8.4.8 8.4.9 8.5 Flash DC Electrical Characteris ................................................................................ 131 8.6 I2C Dynamic Characteristics .................................................................................... 132 8.7 SPI Dynamic Characteristics .................................................................................... 133 8.7.1 9 10 12-bit ADC ................................................................................................................... 127 Analog Comparator ...................................................................................................... 129 USB PHY ..................................................................................................................... 130 Dynamic Characteristics of Data Input and Output Pin ................................................ 133 PACKAGE DIMENSIONS .............................................................................. 135 9.1 LQFP 100L (14x14x1.4 mm footprint 2.0 mm) ......................................................... 135 9.2 LQFP 64L (7x7x1.4 mm footprint 2.0 mm) ............................................................... 136 9.3 LQFP 48L (7x7x1.4 mm Footprint 2.0 mm) .............................................................. 137 9.4 QFN 48L (7x7x0.8 mm) ............................................................................................ 138 REVISION HISTORY ...................................................................................... 139 NUC126 SERIES DATASHEET Aug. 08, 2018 Page 5 of 140 Rev 1.04 NUC126 LIST OF FIGURES ® Figure 4.2-1 NuMicro NUC126 USB Series QFN 48-pin Diagram ............................................... 22 ® Figure 4.2-2 NuMicro NUC126 USB Series LQFP 48-pin Diagram ............................................. 23 ® Figure 4.2-3 NuMicro NUC126 USB Series LQFP 64-pin Diagram ............................................. 24 ® Figure 4.2-4 NuMicro NUC126 USB Series LQFP 100-pin Diagram ........................................... 25 ® Figure 5.1-1 NuMicro NUC126 Block Diagram ............................................................................. 53 Figure 6.1-1 Functional Block Diagram .......................................................................................... 54 Figure 6.2-1 System Reset Sources ............................................................................................... 57 Figure 6.2-2 nRESET Reset Waveform ......................................................................................... 59 Figure 6.2-3 Power-on Reset (POR) Waveform ............................................................................. 60 Figure 6.2-4 Low Voltage Reset (LVR) Waveform ......................................................................... 61 Figure 6.2-5 Brown-out Detector (BOD) Waveform ....................................................................... 62 ® Figure 6.2-6 NuMicro NUC126 Power Mode State Machine ........................................................ 64 ® Figure 6.2-7 NuMicro NUC126 Power Distribution Diagram ........................................................ 67 Figure 6.2-8 SRAM Block Diagram ................................................................................................ 70 Figure 6.2-9 SRAM Memory Organization ..................................................................................... 71 Figure 6.2-10 UART1_TXD Modulated with PWM Channel........................................................... 72 Figure 6.2-11 VDET Block Diagram ............................................................................................... 73 Figure 6.3-1 Clock Generator Block Diagram................................................................................. 79 Figure 6.3-2 Clock Generator Global View Diagram ...................................................................... 80 Figure 6.3-3 System Clock Block Diagram ..................................................................................... 81 NUC126 SERIES DATASHEET Figure 6.3-4 HXT Stop Protect Procedure...................................................................................... 82 Figure 6.3-5 SysTick Clock Control Block Diagram ....................................................................... 82 Figure 6.3-6 Clock Source of Clock Output .................................................................................... 83 Figure 6.3-7 Clock Output Block Diagram ...................................................................................... 84 Figure 6.10-1 Hardware Divider Block Diagram ............................................................................. 91 Figure 6.21-1 SPI Master Mode Application Block Diagram ........................................................ 104 Figure 6.21-2 SPI Slave Mode Application Block Diagram .......................................................... 104 2 Figure 6.22-1 I C Bus Timing ....................................................................................................... 106 Figure 6.24-1 Watchdog Timer Clock Control .............................................................................. 108 Figure 6.25-1 WWDT Clock Control ............................................................................................. 109 Figure 8.3-1 Typical Crystal Application Circuit ............................................................................ 121 Figure 8.3-2 Typical Crystal Application Circuit ............................................................................ 122 2 Figure 8.6-1 I C Timing Diagram .................................................................................................. 132 Figure 8.7-1 SPI Master Mode Timing Diagram ........................................................................... 133 Figure 8.7-2 SPI Slave Mode Timing Diagram ............................................................................. 134 Aug. 08, 2018 Page 6 of 140 Rev 1.04 NUC126 List of Tables Table 1.1-1 Key Features Support Table ......................................................................................... 9 Table 3.1-1 List of Abbreviations .................................................................................................... 19 Table 4.3-1 NUC126 GPIO Multi-function Table ............................................................................ 52 Table 6.2-1 Reset Value of Registers ............................................................................................. 59 Table 6.2-2 Power Mode Difference Table ..................................................................................... 63 Table 6.2-3 Clocks in Power Modes .............................................................................................. 65 Table 6.2-4 Condition of Entering Power-down Mode Again ......................................................... 66 Table 6.2-5 Address Space Assignments for On-Chip Controllers ................................................ 69 Table 6.2-6 Exception Model .......................................................................................................... 76 Table 6.2-7 Interrupt Number Table ............................................................................................... 77 Table 6.3-8 Clock Stable Count Value Table ................................................................................. 79 NUC126 SERIES DATASHEET Aug. 08, 2018 Page 7 of 140 Rev 1.04 NUC126 1 GENERAL DESCRIPTION ® ® ® The NuMicro NUC126 series microcontroller based on the ARM Cortex -M0 core operates at up to 72 MHz. With its crystal-less USB 2.0 FS interface, it is able to generate precise frequency required by USB protocol without the need of external crystal. It features adjustable V DDIO pins for specific I/O pins with a wide range of voltage from 1.8V to 5.5V for various operating voltages of external components, a unique high-speed PWM with clock frequency up to 144 MHz for precision control, and an integrated hardware divider to speed up the calculation for the control algorithms. Apart from that, the NUC126 also integrates SPROM (Security Protection ROM) which provides a secure code execution area to protect the intelligent property of developers. The NUC126 series is ideal for industrial control, motor control and metering applications. The NUC126 series supports the wide voltage range from 2.5V to 5.5V and temperature ranging from -40℃ to 105℃, up to 256 Kbytes of Flash memory, 20 Kbytes of SRAM, 4 Kbytes of ISP (InSystem Programming) ROM as well as ICP (In-Circuit Programming) ROM and IAP (InApplication Programming) ROM in 48-, 64- or 100-pin packages. It also supports high immunity of 8KV ESD (HBM)/4KV EFT. It is also equipped with plenty of peripherals such as USB interface, Timers, Watchdog Timers, RTC, PDMA, EBI, UART, Smart Card Interface, SPI, I²S, I²C, GPIO, up to 12 channels of 16-bit PWM, up to 20 channels of 12-bit ADC, analog comparator, temperature sensor, low voltage reset, brown-out detector, 96-bit UID (Unique Identification), and 128-bit UCID (Unique Customer Identification). NUC126 SERIES DATASHEET Aug. 08, 2018 Page 8 of 140 Rev 1.04 NUC126 1.1 Key Feature and Application Product Line USB USCI UART I2C SPI/I2S NUC126 2.0 FS Device 3 3 2 2 ISO 7816 2 PWM EBI PDMA ADC ACMP RTC VBAT VDDIO 12 Y 5 20 2 Y Y Table 1.1-1 Key Features Support Table ® The NuMicro NUC126 series is suitable for a wide range of applications such as:  Industrial Automation  PLCs  Inverters  Home Automation  Security Alarm System  Power Metering  Portable Data Collector  Portable RFID Reader  System Supervisors  Smart Card Reader  Printer  Bar Code Scanner  Motor Control  Digital Power NUC126 SERIES DATASHEET Aug. 08, 2018 Page 9 of 140 Rev 1.04 NUC126 2 FEATURES 2.1 NuMicro® NUC126 Features  Core ® ® – ARM Cortex -M0 core running up to 72 MHz – One 24-bit system timer – Supports low power sleep mode – Single-cycle 32-bit hardware multiplier – NVIC for the 32 interrupt inputs, each with 4-levels of priority – Supports programmable mask-able interrupts – Serial Wire Debug supports with 2 watch-points/4 breakpoints  Built-in LDO for wide operating voltage ranged from 2.5V to 5.5V  Flash Memory – – – – – – – Supports 256/128 KB application ROM (APROM) Supports 4 KB Flash for loader (LDROM) Supports 2 KB Security Protection Rom (SPROM) Supports 12 bytes User Configuration block to control system initiation Supports Data Flash with configurable memory size Supports 2 KB page erase for all embedded flash Supports In-System-Programming (ISP), In-Application-Programming (IAP) update embedded flash memory – Supports CRC-32 checksum calculation function – Supports flash all one verification function – Hardware external read protection of whole flash memory by Security Lock Bit – Supports 2-wired ICP update through SWD/ICE interface  SRAM Memory NUC126 SERIES DATASHEET – 20 KB embedded SRAM – Supports byte-, half-word- and word-access – Supports PDMA mode  Hardware Divider Signed (two’s complement) integer calculation 32-bit dividend with 16-bit divisor calculation capacity 32-bit quotient and 32-bit remainder outputs (16-bit remainder with sign extends to 32bit) – Divided by zero warning flag – 6 HCLK clocks taken for one cycle calculation – Write divisor to trigger calculation – Waiting for calculation ready automatically when reading quotient and remainder  PDMA (Peripheral DMA) – – – – Supports 5 independent configurable channels for automatic data transfer between memories and peripherals – Supports single and burst transfer type – Supports Normal and Scatter-Gather Transfer modes – Supports two types of priorities modes: Fixed-priority and Round-robin modes – Supports byte-, half-word- and word-access – Supports incrementing mode for the source and destination address for each channel – Supports time-out function for channel 0 and channel 1 – Supports software and SPI/I2S, UART, USCI, USB, ADC, PWM and TIMER request  Clock Control Aug. 08, 2018 Page 10 of 140 Rev 1.04 NUC126 – – – – – – – – – – – – –  GPIO Built-in 22.1184 MHz high speed RC oscillator for system operation (Frequency o o variation < 2% at -40 C ~ +105 C) Built-in 48 MHz internal high speed RC oscillator for USB device operation(Frequency o o variation < 2% at -40 C ~ +105 C) Built-in 10 kHz low speed RC oscillator for Watchdog Timer and Wake-up operation Built-in 4~24 MHz high speed crystal oscillator for precise timing operation Built-in 32.768 kHz low speed crystal oscillator for Real Time Clock Supports PLL up to 144 MHz for high resolution PWM operation Supports dynamically calibrating the HIRC48 to 48 MHz ±0.25% by external 32.768K crystal oscillator (LXT) Supports dynamically calibrating the HIRC to 22.1184Mhz by external 32.768K crystal oscillator (LXT) Supports clock on-the-fly switch Supports clock failure detection for system clock Supports auto clock switch once clock failure detected Supports exception (NMI) generated once a clock failure detected Supports divided clock output – Four I/O modes – TTL/Schmitt trigger input selectable – I/O pin configured as interrupt source with edge/level trigger setting – Supports high driver and high sink current I/O (up to 20 mA at 5V) – Supports software selectable slew rate control – Supports up to 81/49/35 GPIOs for LQFP100/64/48 respectively  Timer/PWM – – Timer Mode PWM Mode TM_CNT_OUT PWM_CH0 TM_EXT PWM_CH1 (Complementary) Timer Mode  Supports 4 sets of 32-bit timers with 24-bit up-timer and one 8-bit pre-scale counter  Independent clock source for each timer  Provides one-shot, periodic, toggle and continuous counting operation modes  Supports event counting function to count the event from external pin  Supports input capture function to capture or reset counter value  Supports chip wake-up from Idle/Power-down mode if a timer interrupt signal is generated  Support Timer0 ~ Timer3 time-out interrupt signal or capture interrupt signal to trigger PWM, EADC and PDMA function  Supports Inter-Timer trigger mode PWM Mode  Supports maximum clock frequency up to 72MHz Aug. 08, 2018  Supports independent mode for 4 sets of independent PWM output channel  Supports complementary mode for 4 sets of complementary paired PWM output channel with 12-bit Dead-time generator  Supports 12-bit pre-scalar from 1 to 4096 Page 11 of 140 Rev 1.04 NUC126 SERIES DATASHEET – Supports 4 sets of Timers/PWM NUC126  Supports 16-bit resolution PWM counter, each timer provides 1 PWM counter  Supports up, down and up/down counter operation type  Supports one-shot or Auto-reload counter operation mode  Supports mask function and tri-state enable for each PWM pin  Supports brake function  Supports interrupt when PWM counter match zero, period value or compared value, and brake condition happened  Supports trigger ADC when PWM counter match zero, period value or compared value  Watchdog Timer – Supports multiple clock sources from LIRC(default selection), HCLK/2048 and LXT – 8 selectable time-out period from 1.6ms ~ 26.0sec (depending on clock source) – Able to wake up from Power-down or Idle mode – Interrupt or reset selectable on watchdog time-out  Window Watchdog Timer – Supports multiple clock sources from HCLK/2048 (default selection) and LIRC – Window set by 6-bit counter with 11-bit prescale – Interrupt or reset selectable on time-out  RTC NUC126 SERIES DATASHEET – – – – – – – – –  PWM – – – – – – – – – – Supports separate battery power pin VBAT Supports software compensation by setting frequency compensate register (FCR) Supports RTC counter (second, minute, hour) and calendar counter (day, month, year) Supports Alarm registers (second, minute, hour, day, month, year) Supports Alarm mask registers Selectable 12-hour or 24-hour mode Automatic leap year recognition Supports periodic time tick interrupt with 8 period options 1/128, 1/64, 1/32, 1/16, 1/8, 1/4, 1/2 and 1 second Supports wake-up function Supports maximum clock frequency up to144MHz Supports up to two PWM modules, each module provides 6 output channels. Supports independent mode for PWM output/Capture input channel Supports complementary mode for 2 complementary paired PWM output channel  Dead-time insertion with 12-bit resolution  Two compared values during one period Supports 12-bit pre-scalar from 1 to 4096 Supports 16-bit resolution PWM counter  Up, down and up/down counter operation type Supports mask function and tri-state enable for each PWM pin Supports brake function  Brake source from pin and system safety events: clock failed, Brown-out detection and CPU lockup.  Noise filter for brake source from pin  Edge detect brake source to control brake state until brake interrupt cleared  Level detect brake source to auto recover function after brake condition removed Supports interrupt on the following events:  PWM counter match zero, period value or compared value  Brake condition happened Supports trigger ADC on the following events: Aug. 08, 2018 Page 12 of 140 Rev 1.04 NUC126  PWM counter match zero, period value or compared value Supports up to 12 capture input channels with 16-bit resolution Supports rising or falling capture condition Supports input rising/falling capture interrupt Supports rising/falling capture with counter reload option USCI – – – –  – Supports up to 3 sets of USCI USCI UART Mode SPI Mode I2C Mode USCI_CLK - SPI_CLK SCL USCI_CTL0 nCTS SPI_SS - USCI_CTL1 nRTS - - USCI_DAT0 Rx SPI_MOSI SDA USCI_DAT1 Tx SPI_MISO - – – – – – – – – – Supports up to 3 sets of UART Full-duplex asynchronous communications Separates receive and transmit 16/16 bytes entry FIFO for data payloads Supports hardware auto-flow control (RX, TX, CTS and RTS) Programmable receiver buffer trigger level Supports programmable baud rate generator for each channel individually Supports 8-bit receiver buffer time-out detection function Programmable transmitting data delay time between the last stop and the next start bit by setting DLY (UART_TOUT [15:8]) Aug. 08, 2018 Page 13 of 140 Rev 1.04 NUC126 SERIES DATASHEET UART Mode  Supports one transmit buffer and two receive buffer for data payload  Supports hardware auto flow control function  Supports programmable baud-rate generator  Support 9-Bit Data Transfer (Support 9-Bit RS-485)  Baud rate detection possible by built-in capture event of baud rate generator  Supports Wake-up function (Data and nCTS Wakeup Only) – SPI Mode  Supports Master or Slave mode operation (the maximum frequency -- Master = fPCLK / 2, Slave = fPCLK / 5)  Supports one transmit buffer and two receive buffers for data payload  Configurable bit length of a transfer word from 4 to 16-bit  Supports MSB first or LSB first transfer sequence  Supports Word Suspend function  Supports 3-wire, no slave select signal, bi-direction interface  Supports wake-up function by slave select signal in Slave mode  Supports one data channel half-duplex transfer – I2C Mode  Full master and slave device capability  Supports of 7-bit addressing, as well as 10-bit addressing  Communication in standard mode (100 kBit/s) or in fast mode (up to 400 kBit/s)  Supports multi-master bus  Supports one transmit buffer and two receive buffer for data payload  Supports 10-bit bus time-out capability  Supports bus monitor mode.  Supports Power down wake-up by data toggle or address match  Supports setup/hold time programmable  Supports multiple address recognition (two slave address with mask option)  UART NUC126 – – Supports Auto-Baud Rate measurement and baud rate compensation function Supports break error, frame error, parity error and receive/transmit buffer overflow detection function – Fully programmable serial-interface characteristics  Programmable number of data bit, 5-, 6-, 7-, 8- bit character  Programmable parity bit, even, odd, no parity or stick parity bit generation and detection  Programmable stop bit, 1, 1.5, or 2 stop bit generation – Supports IrDA SIR function mode  Supports for 3/16 bit duration for normal mode – Supports LIN function mode  Supports LIN master/slave mode  Supports programmable break generation function for transmitter  Supports break detection function for receiver – Supports RS-485 mode  Supports RS-485 9-bit mode  Supports hardware or software enables to program nRTS pin to control RS-485 transmission direction – Supports nCTS, incoming data, Received Data FIFO reached threshold and RS-485 Address Match (AAD mode) wake-up function – Supports PDMA transfer  Smart Card Host (SC) – Supports up to two Smart Card Hosts NUC126 SERIES DATASHEET SC Mode UART Mode SC_DATA Rx SC_CLK Tx SC_CD - SC_PWR - SC_RST - – SC Mode  Supports up to two ISO-7816-3 ports  Compliant to ISO-7816-3 T=0, T=1  Separate receive / transmit 4 bytes entry FIFO for data payloads  Programmable transmission clock frequency  Programmable receiver buffer trigger level  Programmable guard time selection (11 ETU ~ 266 ETU)  One 24-bit and two 8-bit time-out counters for Answer to Request (ATR) and waiting times processing  Supports auto inverse convention function  Supports transmitter and receiver error retry and error limit function  Supports hardware activation sequence process  Supports hardware warm reset sequence process  Supports hardware deactivation sequence process  Supports hardware auto deactivation sequence when detecting the card is removal – UART Mode  Full duplex, asynchronous communications  Supports receiving / transmitting 4-bytes FIFO  Supports programmable baud rate generator for each channel  Programmable even, odd or no parity bit generation and detection  Programmable stop bit, 1 or 2 stop bit generation 2  SPI/I S Aug. 08, 2018 Page 14 of 140 Rev 1.04 NUC126 – – – Supports up to two SPI/I2S controllers SPI Mode I2S Mode SPI_CLK I2S_BCLK SPI_SS I2S_LRCLK SPI_MOSI I2S_DO SPI_MISO I2S_DI - I2S_MCLK SPI Mode  Supports Master or Slave mode operation  Configurable bit length of a transfer word from 8 to 32-bit  Provides separate 4-/8-level depth transmit and receive FIFO buffers  Supports MSB first or LSB first transfer sequence  Supports Byte Reorder function  Supports PDMA transfer I2S Mode  Supports Master or Slave mode operation  Capable of handling 8-, 16-, 24- and 32-bit word sizes in I2S mode  Provides separate 4-level depth transmit and receive FIFO buffers in I2S mode  Supports monaural and stereo audio data in I2S mode  Supports PCM mode A, PCM mode B, I2S and MSB justified data format in I2S mode  Supports PDMA transfer 2 I C – – – – – – – – – – – – – – – Crystal-less USB 2.0 FS Device Compliant to USB specification version 2.0 On-chip USB Transceiver Supports Control, Bulk In/Out, Interrupt and Isochronous transfers Auto suspend function when no bus signaling for 3 ms Supports USB 2.0 Link Power Management (LPM) Provides 8 programmable endpoints Supports 512 Bytes internal SRAM as USB buffer Provides remote wake-up capability On-chip 5V to 3.3V LDO for USB PHY Aug. 08, 2018 Page 15 of 140 Rev 1.04 NUC126 SERIES DATASHEET Supports up to two sets of I2C device Supports Master/Slave mode Supports bidirectional data transfer between masters and slaves Supports multi-master bus (no central master) Arbitration between simultaneously transmitting masters without corruption of serial data on the bus – Serial clock synchronization allows devices with different bit rates to communicate via one serial bus – Serial clock synchronization can be used as a handshake mechanism to suspend and resume serial transfer – Supports 14-bit time-out counter requesting the I2C interrupt if the I2C bus hangs up and timer-out counter overflows – Programmable clocks allow versatile rate control – Supports multiple address recognition, four slave address with mask option – Supports two-level buffer function – Supports setup/hold time programmable – Supports wake-up function  USB 2.0 FS Device Controller NUC126  ADC – – – – – – – – – Supports 12-bit SAR ADC 12-bit resolution and 10-bit accuracy is guaranteed Analog input voltage range: 0~ AVDD Supports external VREF pin Up to 20 single-end analog input channels Maximum ADC peripheral clock frequency is 16 MHz Conversion rate up to 800K SPS at 5V Configurable ADC internal sampling time Supports single-scan, single-cycle-scan, and continuous scan and scan on enabled channels – Supports individual conversion result register with valid and overrun indicators for each channel – Supports digital comparator to monitor conversion result and user can select whether to generate an interrupt when conversion result matches the compare register setting – An A/D conversion can be triggered by:  Software enable  External pin (STADC)  Timer 0~3 overflow pulse trigger  PWM triggers with optional start delay period – Supports 4 internal channels for  Operational amplifier output  Band-gap VBG input  Temperature sensor input  VBAT voltage measure – Supports internal reference voltage: 2.048V, 2.560V, 3.072V and 4.096V – Supports PDMA transfer  Analog Comparator NUC126 SERIES DATASHEET – – – – Supports up to 2 rail-to-rail analog comparators Supports 4 multiplexed I/O pins at positive node. Supports I/O pin and internal voltages at negative node Support selectable internal voltage reference from:  Band-gap VBG  Voltage divider source from AVDD and internal reference voltage. – Supports programmable hysteresis – Supports programmable speed and power consumption – Interrupts generated when compare results change, interrupt event condition is programmable. – Supports power-down wake-up – Supports triggers for break events and cycle-by-cycle control for PWM  Cyclic Redundancy Calculation Unit – Supports four common polynomials CRC-CCITT, CRC-8, CRC-16, and CRC-32 – Programmable initial value – Supports programmable order reverse setting for input data and CRC checksum – Supports programmable 1’s complement setting for input data and CRC checksum. – Supports 8/16/32-bit of data width – Interrupt generated once checksum error occurs  User Configurable VDD1=1.8~5.5V IO Interface – Supports UART0, SPI0 and I2C0  Supports 96-bit Unique ID (UID)  Supports 128-bit Unique Customer ID (UCID)  One built-in temperature sensor with 1℃ resolution Aug. 08, 2018 Page 16 of 140 Rev 1.04 NUC126  Brown-out detector – With 8 levels: 4.3 V/ 3.7V/ 2.7V/ 2.2V – Supports Brown-out Interrupt and Reset option  Low Voltage Reset – Threshold voltage levels: 2.0 V  Power consumption – Chip power down current < 10 uA with RAM data retention. – VBAT power domain operating current