NUC131LC2AE

NuMicro NUC131 Series Datasheet NuMicro™ NUC131 Series Datasheet Nuvoton is providing this document only for reference purposes of NuMicroTM 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 Oct 31, 2014 Page 1 of 75 Revision 1.00 NUMICRO™ NUC131 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. NuMicro NUC131 Series Datasheet TABLE OF CONTENTS 1 GENERAL DESCRIPTION ..................................................................................... 7 2 FEATURES ............................................................................................................ 8 3 ABBREVIATIONS ................................................................................................ 11 4 PARTS INFORMATION LIST AND PIN CONFIGURATION ................................ 12 4.1 NuMicro MUC131 Series Selection Code ................................................. 12 4.2 NuMicro NUC131 Series Selection Guide................................................. 13 4.3 Pin Configuration ................................................................................ 14 4.3.1 NuMicro NUC131 Pin Diagram .................................................................. 14 4.4 Pin Description .................................................................................. 16 4.4.1 NuMicro NUC131 Pin Description............................................................... 16 5 BLOCK DIAGRAM ............................................................................................... 22 5.1 NuMicro NUC131 Block Diagram ........................................................... 22 6 FUNCTIONAL DESCRIPTION ............................................................................. 23 6.1 ARM® Cortex™-M0 Core ...................................................................... 23 6.2 System Manager ................................................................................ 25 NUMICRO™ NUC131 SERIES DATASHEET 6.2.1 Overview .............................................................................................. 25 6.2.2 System Reset ........................................................................................ 25 6.2.3 System Power Distribution ......................................................................... 26 6.2.4 System Memory Map ............................................................................... 27 6.2.5 System Timer (SysTick) ............................................................................ 29 6.2.6 Nested Vectored Interrupt Controller (NVIC) .................................................... 30 6.2.7 System Control ....................................................................................... 34 6.3 Clock Controller ................................................................................. 35 6.3.1 Overview .............................................................................................. 35 6.3.2 System Clock and SysTick Clock ................................................................. 36 6.3.3 Power-down Mode Clock ........................................................................... 38 6.3.4 Frequency Divider Output .......................................................................... 39 6.4 Flash Memory Controller (FMC) .............................................................. 40 6.4.1 Overview .............................................................................................. 40 6.4.2 Features .............................................................................................. 40 6.5 General Purpose I/O (GPIO) .................................................................. 41 6.5.1 Overview .............................................................................................. 41 6.5.2 Features .............................................................................................. 41 Oct 31, 2014 Page 2 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.6 Timer Controller (TIMER) ...................................................................... 42 6.6.1 Overview .............................................................................................. 42 6.6.2 Features .............................................................................................. 42 6.7 PWM Generator and Capture Timer (PWM) ................................................ 43 6.7.1 Overview .............................................................................................. 43 6.7.2 Features .............................................................................................. 43 6.8 Basic PWM Generator and Capture Timer (BPWM) ....................................... 45 6.8.1 Overview .............................................................................................. 45 6.8.2 Features .............................................................................................. 45 6.9 Watchdog Timer (WDT) ........................................................................ 47 6.9.1 Overview .............................................................................................. 47 6.9.2 Features .............................................................................................. 47 6.10 Window Watchdog Timer (WWDT) ........................................................... 48 6.10.1 Overview .............................................................................................. 48 6.10.2 Features .............................................................................................. 48 6.11 UART Interface Controller (UART) ........................................................... 49 6.11.2 Features .............................................................................................. 49 6.12 I2C Serial Interface Controller (I2C) .......................................................... 50 6.12.1 Overview .............................................................................................. 50 6.12.2 Features .............................................................................................. 50 6.13 Serial Peripheral Interface (SPI) .............................................................. 51 6.13.1 Overview .............................................................................................. 51 6.13.2 Features .............................................................................................. 51 6.14 Controller Area Network (CAN) ............................................................... 52 6.14.1 Overview .............................................................................................. 52 6.14.2 Features .............................................................................................. 52 6.15 Analog-to-Digital Converter (ADC) ........................................................... 53 6.15.1 Overview .............................................................................................. 53 6.15.2 Features .............................................................................................. 53 7 APPLICATION CIRCUIT ...................................................................................... 54 8 ELECTRICAL CHARACTERISTICS .................................................................... 55 8.1 Absolute Maximum Ratings ................................................................... 55 8.2 DC Electrical Characteristics .................................................................. 56 Oct 31, 2014 Page 3 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET 6.11.1 Overview .............................................................................................. 49 NuMicro NUC131 Series Datasheet 8.3 AC Electrical Characteristics .................................................................. 60 8.3.1 External 4~24 MHz High Speed Oscillator ....................................................... 60 8.3.2 External 4~24 MHz High Speed Crystal .......................................................... 60 8.3.3 Internal 22.1184 MHz High Speed Oscillator .................................................... 61 8.3.4 Internal 10 kHz Low Speed Oscillator ............................................................ 62 8.4 Analog Characteristics ......................................................................... 63 8.4.1 12-bit SARADC Specification ...................................................................... 63 8.4.2 LDO and Power Management Specification ..................................................... 64 8.4.3 Low Voltage Reset Specification .................................................................. 65 8.4.4 Brown-out Detector Specification ................................................................. 65 8.4.5 Power-on Reset Specification ..................................................................... 65 8.5 Flash DC Electrical Characteristics ........................................................... 67 8.6 I2C Dynamic Characteristics .................................................................. 68 8.7 SPI Dynamic Characteristics .................................................................. 69 8.8 I2S Dynamic Characteristics .................................................................. 71 9 PACKAGE DIMENSIONS .................................................................................... 73 NUMICRO™ NUC131 SERIES DATASHEET 9.1 64-pin LQFP (7x7x1.4 mm footprint 2.0 mm) ............................................... 73 9.2 48-pin LQFP (7x7x1.4 mm footprint 2.0 mm) ............................................... 74 10 REVISION HISTORY ............................................................................................ 75 Oct 31, 2014 Page 4 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet List of Figures Figure 4-1 NuMicro NUC131 Series Selection Code .................................................................. 12 Figure 4-2 NuMicro NUC131SxxAE LQFP 64-pin Diagram ........................................................ 14 Figure 4-3 NuMicro NUC131LxxAE LQFP 48-pin Diagram ........................................................ 15 Figure 5-1 NuMicro NUC131 Block Diagram .............................................................................. 22 Figure 6-1 Functional Controller Diagram ...................................................................................... 23 Figure 6-2 NuMicro NUC131 Power Distribution Diagram .......................................................... 26 Figure 6-3 Clock Generator Block Diagram ................................................................................... 35 Figure 6-4 Clock Generator Global View Diagram......................................................................... 36 Figure 6-5 System Clock Block Diagram ....................................................................................... 37 Figure 6-6 SysTick Clock Control Block Diagram .......................................................................... 37 Figure 6-7 Clock Source of Frequency Divider .............................................................................. 39 Figure 6-8 Frequency Divider Block Diagram ................................................................................ 39 Figure 8-1 Typical Crystal Application Circuit ................................................................................ 61 Figure 8-2 HIRC Accuracy vs. Temperature .................................................................................. 62 Figure 8-3 Power-up Ramp Condition............................................................................................ 66 Figure 8-4 I2C Timing Diagram ...................................................................................................... 68 Figure 8-6 SPI Slave Mode Timing Diagram ................................................................................. 70 Figure 8-7 I2S Master Mode Timing Diagram ................................................................................ 71 Figure 8-8 I2S Slave Mode Timing Diagram .................................................................................. 72 Oct 31, 2014 Page 5 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET Figure 8-5 SPI Master Mode Timing Diagram ............................................................................... 69 NuMicro NUC131 Series Datasheet List of Tables Table 3-1 List of Abbreviations....................................................................................................... 11 Table 6-1 Address Space Assignments for On-Chip Controllers ................................................... 28 Table 6-2 Exception Model ............................................................................................................ 31 Table 6-3 System Interrupt Map..................................................................................................... 32 Table 6-4 Vector Table Format ...................................................................................................... 33 Table 6-5 PWM and BPWM Features Different Table ................................................................... 44 Table 6-6 PWM and BPWM Features Different Table ................................................................... 46 NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 6 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 1 GENERAL DESCRIPTION The NuMicro NUC131 CAN Line is embedded with the Cortex™-M0 core running up to 50 MHz and features 36K/68K bytes flash, 8K bytes SRAM, and 4 Kbytes loader ROM for the ISP. It is also equipped with plenty of peripheral devices, such as Timers, Watchdog Timer (WDT), Window Watchdog Timer (WWDT), UART, SPI, I2C, PWM, GPIO, LIN, CAN, 800 kSPS high speed 12-bit ADC, Low Voltage Reset Controller and Brown-out Detector. NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 7 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 2 FEATURES NUMICRO™ NUC131 SERIES DATASHEET  ARM® Cortex™-M0 core – Runs up to 50 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 – Serial Wire Debug supports with 2 watchpoints/4 breakpoints  Built-in LDO for wide operating voltage ranged from 2.5 V to 5.5 V  Flash Memory – 36K/68K bytes Flash for program code – Configurable Flash memory for data memory (Data Flash), 4 KB flash for ISP loader – Supports In-System-Program (ISP) and In-Application-Program (IAP) application code update – 512 byte page erase for flash – Supports 2-wired ICP update through SWD/ICE interface – Supports fast parallel programming mode by external programmer  SRAM Memory – 8KB embedded SRAM  Clock Control – Flexible selection for different applications – Built-in 22.1184 MHz high speed oscillator for system operation  Trimmed to ±1 % at +25 ℃ and VDD = 5 V  Trimmed to ±2 % at -40 ℃ ~ +105 ℃ and VDD = 2.5 V ~ 5.5 V – Built-in 10 kHz low speed oscillator for Watchdog Timer and Wake-up operation – Supports one PLL output frequency up to 200 MHz, BPWM/PWM clock frequency up to 100 MHz, and System operation frequency up to 50 MHz – External 4~24 MHz high speed crystal input for precise timing operation  GPIO – Four I/O modes:  Quasi-bidirectional  Push-pull output  Open-drain output  Input only with high impendence – TTL/Schmitt trigger input selectable – I/O pin configured as interrupt source with edge/level setting  Timer – Supports 4 sets of 32-bit timers with 24-bit up-timer and one 8-bit prescale counter – Independent clock source for each timer – Provides one-shot, periodic, toggle and continuous counting operation modes – Supports event counting function – Supports input capture function  Watchdog Timer – Multiple clock sources  System clock (HCLK)  Internal 10 kHz oscillator (LIRC) – 8 selectable time-out period from 1.6 ms ~ 26.0 sec (depending on clock source) – Wake-up from Power-down or Idle mode – Interrupt or reset selectable on watchdog time-out  Window Watchdog Timer – 6-bit down counter with 11-bit prescale for wide range window selected  BPWM/Capture – Supports maximum clock frequency up to 100MHz – Supports up to two BPWM modules, each module provides one 16-bit timer and 6 output Oct 31, 2014 Page 8 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet Oct 31, 2014 Page 9 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET channels – Supports independent mode for BPWM output/Capture input channel – Supports 12-bit pre-scalar from 1 to 4096 – Supports 16-bit resolution BPWM counter  Up, down and up/down counter operation type – Supports mask function and tri-state enable for each BPWM pin – Supports interrupt on the following events:  BPWM counter match zero, period value or compared value – Supports trigger ADC on the following events:  BPWM counter match zero, period value or compared value – Supports up to 12 capture input channels with 16-bit resolution – Supports rising edges, falling edges or both edges capture condition – Supports input rising edges, falling edges or both edges capture interrupt – Supports rising edges, falling edges or both edges capture with counter reload option  PWM/Capture – Supports maximum clock frequency up to 100MHz – Supports up to two PWM modules, each module provides three 16-bit timers and 6 output channels – Supports independent mode for PWM output/Capture input channel – Supports complementary mode for 3 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:  PWM counter match zero, period value or compared value – Supports up to 12 capture input channels with 16-bit resolution – Supports rising edges, falling edges or both edges capture condition – Supports input rising edges, falling edges or both edges capture interrupt – Supports rising edges, falling edges or both edges capture with counter reload option  UART – Up to six UART controllers – UART0 and UART1 ports with flow control (TXD, RXD, nCTS and nRTS) – UART0, UART1 and UART2 with 16-byte FIFO for standard device – Supports IrDA (SIR) and LIN function – Supports RS-485 9-bit mode and direction control – Supports auto baud-rate generator  SPI – One set of SPI controller – Supports SPI Master/Slave mode – Full duplex synchronous serial data transfer – Variable length of transfer data from 8 to 32 bits – MSB or LSB first data transfer – Rx and Tx on both rising or falling edge of serial clock independently NuMicro NUC131 Series Datasheet   NUMICRO™ NUC131 SERIES DATASHEET        – Supports Byte Suspend mode in 32-bit transmission – Supports three wire, no slave select signal, bi-direction interface I2C – Up to two sets of I2C devices – Master/Slave mode – Bidirectional data transfer between masters and slaves – Multi-master bus (no central master) – Arbitration between simultaneously transmitting masters without corruption of serial data on the bus – Serial clock synchronization allowing devices with different bit rates to communicate via one serial bus – Serial clock synchronization used as a handshake mechanism to suspend and resume serial transfer – Programmable clocks allowing for versatile rate control – Supports multiple address recognition (four slave address with mask option) – Supports wake-up function CAN 2.0 – One set of CAN device – Supports CAN protocol version 2.0 part A and B – Bit rates up to 1M bit/s – 32 Message Objects – Each Message Object has its own identifier mask – Programmable FIFO mode (concatenation of Message Object) – Maskable interrupt – Disabled Automatic Re-transmission mode for Time Triggered CAN applications – Support power-down wake-up function ADC – 12-bit SAR ADC with 800 kSPS – Up to 8-ch single-end input or 4-ch differential input – Single scan/single cycle scan/continuous scan – Each channel with individual result register – Scan on enabled channels – Threshold voltage detection – Conversion started by software programming or external input 96-bit unique ID (UID) 128-bit unique customer ID(UCID) Brown-out Detector – With 4 levels: 4.4 V/3.7 V/2.7 V/2.2 V – Supports Brown-out Interrupt and Reset option Low Voltage Reset – Threshold voltage level: 2.0 V Operating Temperature: -40℃ ~ +105℃ Packages: – All Green package (RoHS) – LQFP 64-pin / 48-pin (7mm x 7mm) Oct 31, 2014 Page 10 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 3 ABBREVIATIONS Description ADC Analog-to-Digital Converter APB Advanced Peripheral Bus AHB Advanced High-Performance Bus BOD Brown-out Detection BPWM Basic Pulse Width Modulation CAN Controller Area Network DAP Debug Access Port FIFO First In, First Out FMC Flash Memory Controller GPIO General-Purpose Input/Output HCLK The Clock of Advanced High-Performance Bus HIRC 22.1184 MHz Internal High Speed RC Oscillator HXT 4~24 MHz External High Speed Crystal Oscillator IAP In Application Programming ICP In Circuit Programming ISP In System Programming LDO Low Dropout Regulator LIN Local Interconnect Network LIRC 10 kHz internal low speed RC oscillator (LIRC) MPU Memory Protection Unit NVIC Nested Vectored Interrupt Controller PCLK The Clock of Advanced Peripheral Bus PLL Phase-Locked Loop PWM Pulse Width Modulation SPI Serial Peripheral Interface SPS Samples per Second TMR Timer Controller UART Universal Asynchronous Receiver/Transmitter UCID Unique Customer ID WDT Watchdog Timer WWDT Window Watchdog Timer NUMICRO™ NUC131 SERIES DATASHEET Acronym Table 3-1 List of Abbreviations Oct 31, 2014 Page 11 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 4 PARTS INFORMATION LIST AND PIN CONFIGURATION 4.1 NuMicro MUC131 Series Selection Code NUC131 - X X X X E CPU core ARM Cortex M0 Temperature E: - 40 ℃ ~ +105℃ Package Type Version A: Version L: LQFP 48 (7x7) S: LQFP 64 (7x7) SRAM Size 2: 8KB SRAM Flash ROM C: 36 KB Flash ROM D: 68 KB Flash ROM Figure 4-1 NuMicro NUC131 Series Selection Code NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 12 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 4.2 NuMicro NUC131 Series Selection Guide Data Flash (KB) ISP ROM (KB) I/O Timer (32-Bit) UART SPI IC LIN CAN PWM (16-Bit) ADC (12-Bit) ISP/ICP/IAP Package 36 8 Configurable 4 42 4 6 1 2 3 1 24 8 ch √ LQFP48 NUC131LD2AE 68 8 Configurable 4 42 4 6 1 2 3 1 24 8 ch √ LQFP48 NUC131SC2AE 36 8 Configurable 4 56 4 6 1 2 3 1 24 8 ch √ LQFP64 NUC131SD2AE 68 8 Configurable 4 56 4 6 1 2 3 1 24 8 ch √ LQFP64 2 RAM (KB) NUC131LC2AE Part Number APROM (KB) Connectivity NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 13 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 4.3 Pin Configuration 4.3.1 NuMicro NUC131 Pin Diagram PA.13/PWM0_CH1/UART5_TXD PA.14/PWM0_CH2 PA.15/PWM0_CH3 PC.8/PWM0_BRAKE0 PC.9/PWM0_BRAKE1 PC.10/PWM1_BRAKE0 PC.11/PWM1_BRAKE1 37 36 35 34 33 PF.6/ICE_CLK 42 38 AVSS 43 39 PA.0/ADC_CH0/PWM0_CH4/I2C1_SCL/UART5_TXD 44 PF.7/ICE_DAT PA.1/ADC_CH1/PWM0_CH5/I2C1_SDA/UART5_RXD 45 PA.12/PWM0_CH0/UART5_RXD PA.2/ADC_CH2/PWM1_CH0/UART3_TXD 46 40 PA.3/ADC_CH3/PWM1_CH1/UART3_RXD 47 41 PA.4/ADC_CH4 48 4.3.1.1 NuMicro NUC131SxxAE LQFP 64 pin (7 mm * 7mm) 49 32 PB.9/TM1 UART3_TXD/ADC_CH6/PA.6 50 31 PB.10/TM2 VREF/ADC_CH7/PA.7 51 30 PB.11/TM3/PWM0_CH4 AVDD 52 29 PE.5/TM1_EXT/TM1/PWM0_CH5 PWM0_BRAKE1/I2C0_SCL/UART4_RXD/PC.7 53 28 PC.0/SPI0_SS0/BPWM0_CH0 PWM0_BRAKE0/I2C0_SDA/UART4_TXD/PC.6 54 27 PC.1/SPI0_CLK/BPWM0_CH1 PC.15 55 26 PC.2/SPI0_MISO0/BPWM0_CH2 PC.14 56 25 PC.3/SPI0_MOSI0/BPWM0_CH3 BPWM1_CH5/TM0/TM0_EXT/INT1/PB.15 57 24 PD.15/UART2_TXD/BPWM0_CH4 XT1_OUT/PF.0 58 23 PD.14/UART2_RXD/BPWM0_CH5 XT1_IN/PF.1 59 22 PD.7/CAN0_TXD/BPWM1_CH0 nRESET 60 21 PD.6/CAN0_RXD/BPWM1_CH1 VSS 61 20 PB.3/UART0_nCTS/TM3_EXT/TM3/PWM1_BRAKE0 VDD 62 19 PB.2/UART0_nRTS/TM2_EXT/TM2/PWM1_BRAKE1 BPWM1_CH4/CLKO/PF.8 63 18 PB.1/UART0_TXD BPWM1_CH2/CLKO/TM0/STADC/PB.8 64 17 PB.0/UART0_RXD 14 15 16 LDO_CAP VDD VSS 9 UART1_nRTS/I2C0_SDA/PA.8 13 8 UART1_nCTS/I2C0_SCL/PA.9 UART1_nCTS/PB.7 7 PWM1_CH2/I2C1_SDA/PA.10 12 6 PWM1_CH3/I2C1_SCL/PA.11 UART1_nRTS/PB.6 5 PWM1_CH4/I2C0_SDA/PF.4 11 4 PWM1_CH5/I2C0_SCL/PF.5 10 3 BPWM1_CH3/CLKO/PB.12 UART1_TXD/PB.5 2 UART1_RXD/PB.4 1 PB.13 NUC131SxxAE LQFP 64-pin INT0/PB.14 NUMICRO™ NUC131 SERIES DATASHEET UART3_RXD/ADC_CH5/PA.5 Figure 4-2 NuMicro NUC131SxxAE LQFP 64-pin Diagram Oct 31, 2014 Page 14 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet PA.13/PWM0_CH1/UART5_TXD PA.14/PWM0_CH2 PA.15/PWM0_CH3 25 PF.6/ICE_CLK 30 26 AVSS 31 27 PA.0/ADC_CH0/PWM0_CH4/I2C1_SCL/UART5_TXD 32 PF.7/ICE_DAT PA.1/ADC_CH1/PWM0_CH5/I2C1_SDA/UART5_RXD 33 PA.12/PWM0_CH0/UART5_RXD PA.2/ADC_CH2/PWM1_CH0/UART3_TXD 34 28 PA.3/ADC_CH3/PWM1_CH1/UART3_RXD 35 29 PA.4/ADC_CH4 36 4.3.1.2 NuMicro NUC131LxxAE LQFP 48 pin UART3_RXD/ADC_CH5/PA.5 37 24 PC.0/SPI0_SS0/BPWM0_CH0 UART3_TXD/ADC_CH6/PA.6 38 23 PC.1/SPI0_CLK/BPWM0_CH1 VREF/ADC_CH7/PA.7 39 22 PC.2/SPI0_MISO0/BPWM0_CH2 AVDD 40 21 PC.3/SPI0_MOSI0/BPWM0_CH3 PWM0_BRAKE1/I2C0_SCL/UART4_RXD/PC.7 41 20 PD.15/UART2_TXD/BPWM0_CH4 PWM0_BRAKE0/I2C0_SDA/UART4_TXD/PC.6 42 19 PD.14/UART2_RXD/BPWM0_CH5 BPWM1_CH5/TM0/TM0_EXT/INT1/PB.15 43 18 PD.7/CAN0_TXD/BPWM1_CH0 XT1_OUT/PF.0 44 17 PD.6/CAN0_RXD/BPWM1_CH1 XT1_IN/PF.1 45 16 PB.3/UART0_nCTS/TM3_EXT/TM3/PWM1_BRAKE0 nRESET 46 15 PB.2/UART0_nRTS/TM2_EXT/TM2/PWM1_BRAKE1 BPWM1_CH4/CLKO/PF.8 47 14 PB.1/UART0_TXD BPWM1_CH2/CLKO/TM0/STADC/PB.8 48 13 PB.0/UART0_RXD 7 8 9 UART1_nRTS/I2C0_SDA/PA.8 UART1_RXD/PB.4 UART1_TXD/PB.5 12 6 UART1_nCTS/I2C0_SCL/PA.9 VSS 5 PWM1_CH2/I2C1_SDA/PA.10 11 4 PWM1_CH3/I2C1_SCL/PA.11 10 3 PWM1_CH4/I2C0_SDA/PF.4 VDD 2 LDO_CAP 1 BPWM1_CH3/CLKO/PB.12 NUMICRO™ NUC131 SERIES DATASHEET PWM1_CH5/I2C0_SCL/PF.5 NUC131LxxAE LQFP 48-pin Figure 4-3 NuMicro NUC131LxxAE LQFP 48-pin Diagram Oct 31, 2014 Page 15 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 4.4 Pin Description 4.4.1 NuMicro NUC131 Pin Description Pin No. LQFP 64-pin LQFP 48-pin Pin Name Pin Description Type PB.14 I/O General purpose digital I/O pin. INT0 I PB.13 I/O General purpose digital I/O pin. PB.12 I/O General purpose digital I/O pin. CLKO O Frequency divider clock output pin. BPWM1_CH3 I/O BPWM1 CH3 output/Capture input. PF.5 I/O General purpose digital I/O pin. I2C0_SCL I/O I C0 clock pin. PWM1_CH5 I/O PWM1 CH5 output/Capture input. PF.4 I/O General purpose digital I/O pin. I2C0_SDA I/O I C0 data input/output pin. PWM1_CH4 I/O PWM1 CH4 output/Capture input. PA.11 I/O General purpose digital I/O pin. I2C1_SCL I/O I C1 clock pin. PWM1_CH3 I/O PWM1 CH3 output/Capture input. PA.10 I/O General purpose digital I/O pin. I2C1_SDA I/O I C1 data input/output pin. PWM1_CH2 I/O PWM1 CH2 output/Capture input. PA.9 I/O General purpose digital I/O pin. I2C0_SCL I/O I C0 clock pin. 1 2 3 4 5 NUMICRO™ NUC131 SERIES DATASHEET 6 7 8 1 2 3 4 5 6 UART1_nCTS 9 10 7 2 2 2 2 2 Clear to Send input pin for UART1. PA.8 I/O General purpose digital I/O pin. I2C0_SDA I/O I C0 data input/output pin. UART1_nRTS O Request to Send output pin for UART1. PB.4 I/O General purpose digital I/O pin. 2 8 UART1_RXD 11 I External interrupt0 input pin. I Data receiver input pin for UART1. PB.5 I/O General purpose digital I/O pin. UART1_TXD O Data transmitter output pin for UART1. PB.6 I/O General purpose digital I/O pin. 9 12 Oct 31, 2014 Page 16 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet Pin No. LQFP 64-pin LQFP 48-pin Pin Name Pin Description Type UART1_nRTS O Request to Send output pin for UART1. PB.7 I/O General purpose digital I/O pin. 13 UART1_nCTS I Clear to Send input pin for UART1. 14 10 LDO_CAP P LDO output pin. 15 11 VDD P Power supply for I/O ports and LDO source for internal PLL and digital circuit. 16 12 VSS P Ground pin for digital circuit. 17 13 PB.0 UART0_RXD 18 19 I/O General purpose digital I/O pin. UART0_TXD O Data transmitter output pin for UART0. PB.2 I/O General purpose digital I/O pin. UART0_nRTS O Request to Send output pin for UART0. 15 TM2_EXT I Timer2 external capture input pin. TM2 O Timer2 toggle output pin. PWM1_BRAKE1 I PWM1 brake input pin. 16 23 24 17 18 19 I/O General purpose digital I/O pin. UART0_nCTS I Clear to Send input pin for UART0. TM3_EXT I Timer3 external capture input pin. TM3 O Timer3 toggle output pin. PWM1_BRAKE0 I PWM1 brake input pin. CAN0_RXD I/O I NUMICRO™ NUC131 SERIES DATASHEET 22 Data receiver input pin for UART0. PB.1 PD.6 21 I General purpose digital I/O pin. 14 PB.3 20 I/O General purpose digital I/O pin. Data receiver input pin for CAN0. BPWM1_CH1 I/O BPWM1 CH1 output/Capture input. PD.7 I/O General purpose digital I/O pin. CAN0_TXD O Data transmitter output pin for CAN0. BPWM1_CH0 I/O BPWM1 CH0 output/Capture input. PD.14 I/O General purpose digital I/O pin. UART2_RXD I Data receiver input pin for UART2. BPWM0_CH5 I/O BPWM0 CH5 output/Capture input. PD.15 I/O General purpose digital I/O pin. UART2_TXD O Data transmitter output pin for UART2. 20 Oct 31, 2014 Page 17 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet Pin No. LQFP 64-pin 25 26 27 28 LQFP 48-pin 21 22 23 24 Pin Name Pin Description Type BPWM0_CH4 I/O BPWM0 CH4 input/Capture input. PC.3 I/O General purpose digital I/O pin. SPI0_MOSI0 I/O SPI0 MOSI (Master Out, Slave In) pin. BPWM0_CH3 O BPWM0 CH3 input/Capture input. PC.2 I/O General purpose digital I/O pin. SPI0_MISO0 I/O SPI0 MISO (Master In, Slave Out) pin. BPWM0_CH2 I BPWM0 CH2 input/Capture input. NUMICRO™ NUC131 SERIES DATASHEET PC.1 I/O General purpose digital I/O pin. SPI0_CLK I/O SPI0 serial clock pin. BPWM0_CH1 I/O BPWM0 CH1 input/Capture input. PC.0 I/O General purpose digital I/O pin. SPI0_SS0 I/O SPI0 slave select pin. BPWM0_CH0 I/O BPWM0 CH0 input/Capture input. PE.5 I/O General purpose digital I/O pin. PWM0_CH5 I/O PWM0 CH5 output/Capture input. TM1_EXT I Timer1 external capture input pin. TM1 O Timer1 toggle output pin. PB.11 I/O General purpose digital I/O pin. TM3 I/O Timer3 event counter input / toggle output. PWM0_CH4 I/O PWM0 CH4 output/Capture input. PB.10 I/O General purpose digital I/O pin. TM2 I/O Timer2 event counter input / toggle output. PB.9 I/O General purpose digital I/O pin. TM1 I/O Timer1 event counter input / toggle output. PC.11 I/O General purpose digital I/O pin. 29 30 31 32 33 PWM1_BRAKE1 PC.10 I I/O PWM1 brake input pin. General purpose digital I/O pin. 34 PWM1_BRAKE0 PC.9 I I/O PWM1 brake input pin. General purpose digital I/O pin. 35 PWM0_BRAKE1 36 Oct 31, 2014 PC.8 I I/O PWM0 brake input pin. General purpose digital I/O pin. Page 18 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet Pin No. LQFP 64-pin LQFP 48-pin Pin Name PWM0_BRAKE0 37 38 39 40 41 44 45 PA.15 I/O General purpose digital I/O pin. PWM0_CH3 I/O PWM0 CH3 output/Capture input. PA.14 I/O General purpose digital I/O pin. PWM0_CH2 I/O PWM0 CH2 output/Capture input. PA.13 I/O General purpose digital I/O pin. PWM0_CH1 I/O PWM0 CH1 output/Capture input. UART5_TXD O Data transmitter output pin for UART5. PA.12 I/O General purpose digital I/O pin. PWM0_CH0 I/O PWM0 CH0 output/Capture input. UART5_RXD I Data receiver input pin for UART5. 26 27 28 PF.7 I/O General purpose digital I/O pin. ICE_DAT I/O Serial wire debugger data pin. PF.6 I/O General purpose digital I/O pin. I Serial wire debugger clock pin. 29 30 31 32 33 AVSS AP Ground pin for analog circuit. PA.0 I/O General purpose digital I/O pin. ADC_CH0 AI ADC_CH0 analog input. PWM0_CH4 I/O PWM0 CH4 output/Capture input. I2C1_SCL I/O I C1 clock pin. UART5_TXD O Data transmitter output pin for UART5. PA.1 I/O General purpose digital I/O pin. ADC_CH1 AI ADC_CH1 analog input. PWM0_CH5 I/O PWM0 CH5 output/Capture input. I2C1_SDA I/O I C1 data input/output pin. UART5_RXD 46 47 PWM0 brake input pin. 25 ICE_CLK 43 I I NUMICRO™ NUC131 SERIES DATASHEET 42 Pin Description Type 2 2 Data receiver input pin for UART5. PA.2 I/O General purpose digital I/O pin. ADC_CH2 AI ADC_CH2 analog input. PWM1_CH0 I/O PWM1 CH0 output/Capture input. UART3_TXD O Data transmitter output pin for UART3. PA.3 I/O General purpose digital I/O pin. ADC_CH3 AI ADC_CH3 analog input. 34 35 Oct 31, 2014 Page 19 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet Pin No. LQFP 64-pin 48 49 LQFP 48-pin Pin Name PWM1_CH1 I/O PWM1 CH1 output/Capture input. UART3_RXD I Data receiver input pin for UART3. PA.4 I/O General purpose digital I/O pin. ADC_CH4 AI ADC_CH4 analog input. PA.5 I/O General purpose digital I/O pin. ADC_CH5 AI ADC_CH5 analog input. 36 37 UART3_RXD 50 51 52 38 39 40 Data receiver input pin for UART3. NUMICRO™ NUC131 SERIES DATASHEET I/O General purpose digital I/O pin. ADC_CH6 AI ADC_CH6 analog input. UART3_TXD O Data transmitter output pin for UART3. PA.7 I/O General purpose digital I/O pin. ADC_CH7 AI ADC_CH7 analog input. VREF AP Voltage reference input for ADC. AVDD AP Power supply for internal analog circuit. PC.7 I/O General purpose digital I/O pin. I 41 I2C0_SCL PWM0_BRAKE1 54 I PA.6 UART4_RXD 53 Pin Description Type I/O I Data reveiver input pin for UART4. 2 I C0 clock pin. PWM0 brake input pin. PC.6 I/O General purpose digital I/O pin. UART4_TXD O Data transmitter output pin for UART4. I2C0_SDA I/O I C0 data input/output pin. 42 PWM0_BRAKE0 I 2 PWM0 brake input pin. 55 PC.15 I/O General purpose digital I/O pin. 56 PC.14 I/O General purpose digital I/O pin. PB.15 I/O General purpose digital I/O pin. INT1 I External interrupt1 input pin. TM0_EXT I Timer0 external capture input pin. TM0 O Timer0 toggle output pin. BPWM1_CH5 I/O BPWM1 CH5 output/Capture input. PF.0 I/O General purpose digital I/O pin. XT1_OUT O External 4~24 MHz (high speed) crystal output pin. PF.1 I/O General purpose digital I/O pin. 57 58 59 43 44 45 Oct 31, 2014 Page 20 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet Pin No. LQFP 64-pin LQFP 48-pin Pin Name Pin Description Type XT1_IN I External 4~24 MHz (high speed) crystal input pin. nRESET I External reset input: active LOW, with an internal pull-up. Set this pin low reset chip to initial state. 61 VSS P Ground pin for digital circuit. 62 VDD P Power supply for I/O ports and LDO source for internal PLL and digital circuit. PF.8 I/O General purpose digital I/O pin. CLKO O Frequency divider clock output pin. BPWM1_CH4 I/O BPWM1 CH4 output/Capture input. PB.8 I/O General purpose digital I/O pin. 60 63 46 47 STADC 64 48 I ADC external trigger input. TM0 I/O Timer0 event counter input / toggle output. CLKO O Frequency divider clock output pin. BPWM1_CH2 I/O BPWM1 CH2 output/Capture input. Note: Pin Type I = Digital Input, O = Digital Output; AI = Analog Input; P = Power Pin; AP = Analog Power NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 21 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 5 BLOCK DIAGRAM 5.1 NuMicro NUC131 Block Diagram Clock Control High Speed Oscillator 22.1184 MHz ARM CortexTM –M0 50 MHz PLL Timer / PWM Analog Interface 32-bit Timer X 4 12-bit ADC X 8-ch with VREF Low Speed Oscillator 10 kHz Watchdog Timers X 2 High Speed External Crystal Oscillator 4~24 MHz 16-bit PWM 24 Channels Bridge AHB Bus Memory APROM 36/68 KB LDROM 4 KB APB Bus Power Control LDO 1.8V VREF GPIO General Purpose I/O Power On Reset Connectivity UART X 6 SPI X 1 External Interrupt Configurable Data Flash LVR I²C X 2 SRAM 8KB Brownout Detection CAN X 1 NUMICRO™ NUC131 SERIES DATASHEET Figure 5-1 NuMicro NUC131 Block Diagram Oct 31, 2014 Page 22 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6 FUNCTIONAL DESCRIPTION 6.1 ARM® Cortex™-M0 Core The Cortex™-M0 processor is a configurable, multistage, 32-bit RISC processor, which has an AMBA AHB-Lite interface and includes an NVIC component. It also has optional hardware debug functionality. The processor can execute Thumb code and is compatible with other Cortex™-M profile processor. The profile supports two modes -Thread mode and Handler mode. Handler mode is entered as a result of an exception. An exception return can only be issued in Handler mode. Thread mode is entered on Reset, and can be entered as a result of an exception return. Figure 6-1 shows the functional controller of processor. CortexTM-M0 Components CortexTM-M0 processor Nested Vectored Interrupt Controller (NVIC) Interrupts Wakeup Interrupt Controller (WIC) Debug CortexTM-M0 Processor Core Bus Matrix Breakpoint and Watchpoint Unit Debugger Interface Serial Wire or JTAG Debug Port Figure 6-1 Functional Controller Diagram The implemented device provides the following components and features:  Oct 31, 2014 A low gate count processor: - ARMv6-M Thumb® instruction set - Thumb-2 technology - ARMv6-M compliant 24-bit SysTick timer - A 32-bit hardware multiplier - System interface supported with little-endian data accesses - Ability to have deterministic, fixed-latency, interrupt handling - Load/store-multiples and multicycle-multiplies that can be abandoned and restarted to facilitate rapid interrupt handling - C Application Binary Interface compliant exception model. This is the ARMv6-M, C Application Binary Interface (C-ABI) compliant exception model that enables the use of pure C functions as interrupt handlers - Low Power Sleep mode entry using Wait For Interrupt (WFI), Wait For Event Page 23 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET AHB-Lite Interface Debug Access Port (DAP) NuMicro NUC131 Series Datasheet (WFE) instructions, or the return from interrupt sleep-on-exit feature    NVIC: - 32 external interrupt inputs, each with four levels of priority - Dedicated Non-maskable Interrupt (NMI) input - Supports for both level-sensitive and pulse-sensitive interrupt lines - Supports Wake-up Interrupt Controller (WIC) and, providing Ultra-low Power Sleep mode Debug support - Four hardware breakpoints - Two watchpoints - Program Counter Sampling Register (PCSR) for non-intrusive code profiling - Single step and vector catch capabilities Bus interfaces: - Single 32-bit AMBA-3 AHB-Lite system interface that provides simple integration to all system peripherals and memory - Single 32-bit slave port that supports the DAP (Debug Access Port) NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 24 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.2 System Manager 6.2.1 Overview System management includes the following sections:  System Resets  System Memory Map  System management registers for Part Number ID, chip reset and on-chip controllers reset , multi-functional pin control  System Timer (SysTick)  Nested Vectored Interrupt Controller (NVIC)  System Control registers 6.2.2 System Reset The system reset can be issued by one of the following listed events. For these reset event flags can be read by RSTSRC register. Power-on Reset  Low level on the nRESET pin  Watchdog Time-out Reset  Low Voltage Reset  Brown-out Detector Reset  CPU Reset  System Reset System Reset and Power-on Reset all reset the whole chip including all peripherals. The difference between System Reset and Power-on Reset is external crystal circuit and BS (ISPCON[1]) bit. System Reset does not reset external crystal circuit and BS (ISPCON[1]) bit, but Power-on Reset does. Oct 31, 2014 Page 25 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET  NuMicro NUC131 Series Datasheet 6.2.3 System Power Distribution In this chip, the power distribution is divided into three segments.  Analog power from AVDD and AVSS provides the power for analog components operation.  Digital power from VDD and VSS supplies the power to the internal regulator which provides a fixed 1.8 V power for digital operation and I/O pins. The outputs of internal voltage regulators, LDO, require an external capacitor which should be located close to the corresponding pin. Analog power (AVDD) should be the same voltage level with the digital power (VDD). Figure 6-2 shows the NuMicro NUC131 power distribution. NUC131 Power Distribution AVDD 12-bit SAR-ADC AVSS FLASH Brown-out Detector Digital Logic Low Voltage Reset Internal 22.1184 MHz & 10 kHz Oscillator LDO_CAP 1.8V NUMICRO™ NUC131 SERIES DATASHEET 1.8V 1uF POR18 ULDO LDO PLL IO cell GPIO VSS VDD POR50 Figure 6-2 NuMicro NUC131 Power Distribution Diagram Oct 31, 2014 Page 26 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.2.4 System Memory Map The NuMicro NUC131 series provides 4G-byte addressing space. The memory locations assigned to each on-chip controllers are shown in the following table. The detailed register definition, memory space, and programming detailed will be described in the following sections for each on-chip peripheral. The NuMicro NUC131 series only supports little-endian data format. Address Space Token Controllers 0x0000_0000 – 0x0001_0FFF FLASH_BA FLASH Memory Space (68 KB) 0x2000_0000 – 0x2000_3FFF SRAM_BA SRAM Memory Space (8 KB) Flash and SRAM Memory Space AHB Controllers Space (0x5000_0000 – 0x501F_FFFF) 0x5000_0000 – 0x5000_01FF GCR_BA System Global Control Registers 0x5000_0200 – 0x5000_02FF CLK_BA Clock Control Registers 0x5000_0300 – 0x5000_03FF INT_BA Interrupt Multiplexer Control Registers 0x5000_4000 – 0x5000_7FFF GPIO_BA GPIO Control Registers 0x5000_C000 – 0x5000_FFFF FMC_BA Flash Memory Control Registers APB1 Controllers Space (0x4000_0000 ~ 0x400F_FFFF) WDT_BA Watchdog Timer Control Registers 0x4001_0000 – 0x4001_3FFF TMR01_BA Timer0/Timer1 Control Registers 0x4002_0000 – 0x4002_3FFF I2C0_BA I C0 Interface Control Registers 0x4003_0000 – 0x4003_3FFF SPI0_BA SPI0 with master/slave function Control Registers 0x4004_0000 – 0x4004_3FFF PWM0_BA PWM0 Control Registers 0x4004_4000 – 0x4004_7FFF BPWM0_BA BPWM0 Control Registers 0x4005_0000 – 0x4005_3FFF UART0_BA UART0 Control Registers 0x4005_4000 – 0x4005_7FFF UART3_BA UART3 Control Registers 0x4005_8000 – 0x4005_BFFF UART4_BA UART4 Control Registers 0x400E_0000 – 0x400E_FFFF ADC_BA Analog-Digital-Converter (ADC) Control Registers NUMICRO™ NUC131 SERIES DATASHEET 0x4000_4000 – 0x4000_7FFF 2 APB2 Controllers Space (0x4010_0000 ~ 0x401F_FFFF) 0x4011_0000 – 0x4011_3FFF TMR23_BA Timer2/Timer3 Control Registers 0x4012_0000 – 0x4012_3FFF I2C1_BA I C1 Interface Control Registers 0x4014_0000 – 0x4014_3FFF PWM1_BA PWM1 Control Registers 0x4014_4000 – 0x4014_7FFF BPWM1_BA BPWM1 Control Registers 0x4015_0000 – 0x4015_3FFF UART1_BA UART1 Control Registers 0x4015_4000 – 0x4015_7FFF UART2_BA UART2 Control Registers 0x4015_8000 – 0x4015_BFFF UART5_BA UART5 Control Registers 0x4018_0000 – 0x4018_3FFF CAN0_BA CAN0 Bus Control Registers Oct 31, 2014 2 Page 27 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet System Controllers Space (0xE000_E000 ~ 0xE000_EFFF) 0xE000_E010 – 0xE000_E0FF SCS_BA System Timer Control Registers 0xE000_E100 – 0xE000_ECFF SCS_BA External Interrupt Controller Control Registers 0xE000_ED00 – 0xE000_ED8F SCS_BA System Control Registers Table 6-1 Address Space Assignments for On-Chip Controllers NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 28 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.2.5 System Timer (SysTick) The Cortex™-M0 includes an integrated system timer, SysTick, which provides a simple, 24-bit clear-on-write, decrementing, wrap-on-zero counter with a flexible control mechanism. The counter can be used as a Real Time Operating System (RTOS) tick timer or as a simple counter. When system timer is enabled, it will count down from the value in the SysTick Current Value Register (SYST_CVR) to 0, and reload (wrap) to the value in the SysTick Reload Value Register (SYST_RVR) on the next clock cycle, then decrement on subsequent clocks. When the counter transitions to 0, the COUNTFLAG status bit is set. The COUNTFLAG bit clears on reads. The SYST_CVR value is unknown on reset. Software should write to the register to clear it to 0 before enabling the feature. This ensures the timer will count from the SYST_RVR value rather than an arbitrary value when it is enabled. If the SYST_RVR is 0, the timer will be maintained with a current value of 0 after it is reloaded with this value. This mechanism can be used to disable the feature independently from the timer enable bit. For more detailed information, please refer to the “ARM® Cortex™-M0 Technical Reference Manual” and “ARM® v6-M Architecture Reference Manual”. NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 29 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.2.6 Nested Vectored Interrupt Controller (NVIC) The Cortex™-M0 provides an interrupt controller as an integral part of the exception mode, named as “Nested Vectored Interrupt Controller (NVIC)”, which is closely coupled to the processor core and provides following features:  Nested and Vectored interrupt support  Automatic processor state saving and restoration  Reduced and deterministic interrupt latency The NVIC prioritizes and handles all supported exceptions. All exceptions are handled in “Handler Mode”. This NVIC architecture supports 32 (IRQ[31:0]) discrete interrupts with 4 levels of priority. All of the interrupts and most of the system exceptions can be configured to different priority levels. When an interrupt occurs, the NVIC will compare the priority of the new interrupt to the current running one’s priority. If the priority of the new interrupt is higher than the current one, the new interrupt handler will override the current handler. When an interrupt is accepted, the starting address of the interrupt service routine (ISR) is fetched from a vector table in memory. There is no need to determine which interrupt is accepted and branch to the starting address of the correlated ISR by software. While the starting address is fetched, NVIC will also automatically save processor state including the registers “PC, PSR, LR, R0~R3, R12” to the stack. At the end of the ISR, the NVIC will restore the mentioned registers from stack and resume the normal execution. Thus it will take less and deterministic time to process the interrupt request. NUMICRO™ NUC131 SERIES DATASHEET The NVIC supports “Tail Chaining” which handles back-to-back interrupts efficiently without the overhead of states saving and restoration and therefore reduces delay time in switching to pending ISR at the end of current ISR. The NVIC also supports “Late Arrival” which improves the efficiency of concurrent ISRs. When a higher priority interrupt request occurs before the current ISR starts to execute (at the stage of state saving and starting address fetching), the NVIC will give priority to the higher one without delay penalty. Thus it advances the real-time capability. For more detailed information, please refer to the “ARM® Cortex™-M0 Technical Reference Manual” and “ARM® v6-M Architecture Reference Manual”. Oct 31, 2014 Page 30 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.2.6.1 Exception Model and System Interrupt Map The following table lists the exception model supported by NuMicro NUC131 series. Software can set four levels of priority on some of these exceptions as well as on all interrupts. The highest user-configurable priority is denoted as “0” and the lowest priority is denoted as “3”. The default priority of all the user-configurable interrupts is “0”. Note that priority “0” is treated as the fourth priority on the system, after three system exceptions “Reset”, “NMI” and “Hard Fault”. Exception Name Vector Number Priority Reset 1 -3 NMI 2 -2 Hard Fault 3 -1 Reserved 4 ~ 10 Reserved SVCall 11 Configurable Reserved 12 ~ 13 Reserved PendSV 14 Configurable SysTick 15 Configurable Interrupt (IRQ0 ~ IRQ31) 16 ~ 47 Configurable Table 6-2 Exception Model Interrupt Number (Bit In Interrupt Registers) Interrupt Name Source Module 1 ~ 15 - - - 16 0 BOD_INT Brown-out 17 1 WDT_INT WDT Watchdog Timer interrupt 18 2 EINT0 GPIO External signal interrupt from PB.14 pin 19 3 EINT1 GPIO External signal interrupt from PB.15 pin 20 4 GPAB_INT GPIO External signal interrupt from PA[15:0]/PB[13:0] 21 5 GPCDEF_INT GPIO External interrupt from PC[15:0]/PD[15:0]/PE[15:0]/PF[8:0] 22 6 - - Reserved 23 7 - - Reserved 24 8 TMR0_INT TMR0 Timer 0 interrupt 25 9 TMR1_INT TMR1 Timer 1 interrupt 26 10 TMR2_INT TMR2 Timer 2 interrupt 27 11 TMR3_INT TMR3 Timer 3 interrupt 28 12 UART02_INT UART0/2 29 13 UART1_INT UART1 Oct 31, 2014 Interrupt Description System exceptions Brown-out low voltage detected interrupt UART0 and UART2 interrupt UART1 interrupt Page 31 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET Vector Number NuMicro NUC131 Series Datasheet NUMICRO™ NUC131 SERIES DATASHEET 30 14 SPI0_INT SPI0 SPI0 interrupt 31 15 UART3_INT UART3 UART3 interrupt 32 16 UART4_INT UART4 UART4 interrupt 33 17 UART5_INT UART5 UART5 interrupt 34 18 I2C0_INT I C0 35 19 I2C1_INT I C1 36 20 CAN0_INT CAN0 37 21 - - 38 22 PWM0_INT PWM0 PWM0 interrupt 39 23 PWM1_INT PWM1 PWM1 interrupt 40 24 BPWM0_INT BPWM0 BPWM0 interrupt 41 25 BPWM1_INT BPWM1 BPWM1 interrupt 42 26 BRAKE0_INT PWM0 PWM0 brake interrupt 43 27 BRAKE1_INT PWM1 PWM1 brake interrupt 44 28 PWRWU_INT CLKC Clock controller interrupt for chip wake-up from Powerdown state 45 29 ADC_INT ADC ADC interrupt 46 30 CKD_INT CLKC Clock detection interrupt 47 31 - - 2 I C0 interrupt 2 2 I C1 interrupt 2 CAN0 interrupt Reserved Reserved Table 6-3 System Interrupt Map Oct 31, 2014 Page 32 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.2.6.2 Vector Table When an interrupt is accepted, the processor will automatically fetch the starting address of the interrupt service routine (ISR) from a vector table in memory. For ARMv6-M, the vector table base address is fixed at 0x00000000. The vector table contains the initialization value for the stack pointer on reset, and the entry point addresses for all exception handlers. The vector number on previous page defines the order of entries in the vector table associated with exception handler entry as illustrated in previous section. Vector Table Word Offset 0 Vector Number Description SP_main – The Main stack pointer Exception Entry Pointer using that Vector Number Table 6-4 Vector Table Format 6.2.6.3 Operation Description NVIC interrupts can be enabled and disabled by writing to their corresponding Interrupt SetEnable or Interrupt Clear-Enable register bit-field. The registers use a write-1-to-enable and write1-to-clear policy, both registers reading back the current enabled state of the corresponding interrupts. When an interrupt is disabled, interrupt assertion will cause the interrupt to become Pending, however, the interrupt will not activate. If an interrupt is Active when it is disabled, it remains in its Active state until cleared by reset or an exception return. Clearing the enable bit prevents new activations of the associated interrupt. NVIC interrupts are prioritized by updating an 8-bit field within a 32-bit register (each register supporting four interrupts). The general registers associated with the NVIC are all accessible from a block of memory in the System Control Space and will be described in next section. Oct 31, 2014 Page 33 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET NVIC interrupts can be pended/un-pended using a complementary pair of registers to those used to enable/disable the interrupts, named the Set-Pending Register and Clear-Pending Register respectively. The registers use a write-1-to-enable and write-1-to-clear policy, both registers reading back the current pended state of the corresponding interrupts. The Clear-Pending Register has no effect on the execution status of an Active interrupt. NuMicro NUC131 Series Datasheet 6.2.7 System Control The Cortex™-M0 status and operating mode control are managed by System Control Registers. Including CPUID, Cortex™-M0 interrupt priority and Cortex™-M0 power management can be controlled through these system control registers. For more detailed information, please refer to the “ARM® Cortex™-M0 Technical Reference Manual” and “ARM® v6-M Architecture Reference Manual”. NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 34 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.3 Clock Controller 6.3.1 Overview The clock controller generates the clocks for the whole chip, including system clocks and all peripheral clocks. The clock controller also implements the power control function with the individually clock ON/OFF control, clock source selection and clock divider. The chip enters Power-down mode when Cortex™-M0 core executes the WFI instruction only if the PWR_DOWN_EN (PWRCON[7]) bit and PD_WAIT_CPU (PWRCON[8]) bit are both set to 1. After that, chip enters Power-down mode and wait for wake-up interrupt source triggered to leave Power-down mode. In the Power-down mode, the clock controller turns off the 4~24 MHz external high speed crystal oscillator and 22.1184 MHz internal high speed RC oscillator to reduce the overall system power consumption. The following figures show the clock generator and the overview of the clock source control. The clock generator consists of 5 clock sources as listed below:  4~24 MHz external high speed crystal oscillator (HXT)  Programmable PLL output clock frequency(PLL FOUT),PLL source can be from external 4~24 MHz external high speed crystal oscillator (HXT) or 22.1184 MHz internal high speed RC oscillator (HIRC))  22.1184 MHz internal high speed RC oscillator (HIRC)  10 kHz internal low speed RC oscillator (LIRC) XT1_OUT HXT 4~24 MHz HXT PLL_SRC (PLLCON[19]) XT1_IN 0 OSC22M_EN (PWRCON[2]) PLL PLL FOUT 1 22.1184 MHz HIRC HIRC OSC10K_EN (PWRCON[3]) LIRC 10 kHz LIRC Legend: HXT = 4~24 MHz external high speed crystal oscillator HIRC = 22.1184 MHz internal high speed RC oscillator LIRC = 10 kHz internal low speed RC oscillator Figure 6-3 Clock Generator Block Diagram Oct 31, 2014 Page 35 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET XTL12M_EN (PWRCON[0]) NuMicro NUC131 Series Datasheet 22.1184 MHz 22.1184 MHz 111 10 kHz 4~24 MHz PLLFOUT 010 Reserved 10 kHz 000 1/(HCLK_N+1) 22.1184 MHz HCLK PLLFOUT 0 HCLK 4~24 MHz 1/2 111 1/2 011 1/2 010 Reserved 4~24 MHz CLKSEL0[5:3] PCLK I2C 0~1 CAN 0 TMR 3 TMR 2 TMR 1 TMR 0 011 010 Reserved 001 4~24 MHz PLLCON[19] 22.1184 MHz ISP 101 External trigger 4~24 MHz HCLK 111 10 kHz CLKSEL0[2:0] 1 CPU 001 4~24 MHz 22.1184 MHz CPUCLK 011 000 22.1184 MHz CLKSEL1[22:20] CLKSEL1[18:16] CLKSEL1[14:12] CLKSEL1[10:8] CPUCLK 1 0 FMC SysTick SYST_CSR[2] 001 PCLK 000 PLLFOUT NUMICRO™ NUC131 SERIES DATASHEET CLKSEL3[16] CLKSEL3[17] CLKSEL3[18] CLKSEL3[19] PWM 0 PWM 1 BPWM 0 BPWM 1 1 0 CLKSEL2[17:16] 10 kHz HCLK 10 kHz HCLK 11 1/2048 1/2048 10 11 WWDT WDT 10 CLKSEL1[1:0] 22.1184 MHz PLLFOUT 4~24 MHz 11 01 HCLK 00 PLLFOUT HCLK PLLFOUT 4~24 MHz CLKSEL1[3:2] SPI 0 0 CLKSEL1[4] CLKSEL1[25:24] 22.1184 MHz 1 1/(UART_N+1) UART 0~5 1/(ADC_N+1) ADC 11 10 01 22.1184 MHz 00 HCLK Reserved 4~24 MHz 11 10 01 10 kHz BOD FDIV 00 CLKSEL2[3:2] Figure 6-4 Clock Generator Global View Diagram 6.3.2 System Clock and SysTick Clock The system clock has 4 clock sources which were generated from clock generator block. The Oct 31, 2014 Page 36 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet clock source switch depends on the register HCLK_S (CLKSEL0[2:0]). The block diagram is shown in Figure 6-5. HCLK_S (CLKSEL0[2:0]) 22.1184 MHz 10 kHz PLLFOUT Reserved 4~24 MHz 111 011 CPUCLK 010 HCLK 1/(HCLK_N+1) 001 HCLK_N (CLKDIV[3:0]) PCLK CPU AHB APB 000 CPU in Power Down Mode Figure 6-5 System Clock Block Diagram The clock source of SysTick in Cortex™-M0 core can use CPU clock or external clock (SYST_CSR[2]). If using external clock, the SysTick clock (STCLK) has 4 clock sources. The clock source switch depends on the setting of the register STCLK_S (CLKSEL0[5:3]). The block diagram is shown in Figure 6-6. STCLK_S (CLKSEL0[5:3]) HCLK 4~24 MHz Reserved 4~24 MHz 1/2 111 1/2 011 1/2 010 NUMICRO™ NUC131 SERIES DATASHEET 22.1184 MHz STCLK 001 000 Figure 6-6 SysTick Clock Control Block Diagram Oct 31, 2014 Page 37 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.3.3 Power-down Mode Clock When chip enters Power-down mode, system clocks, some clock sources, and some peripheral clocks will be disabled. Some clock sources and peripherals clocks are still active in Power-down mode. The clocks still kept active are listed below:  Clock Generator -  10 kHz internal low speed RC oscillator (LIRC) clock WDT/Timer Peripherals Clock (when 10 kHz intertnal low speed RC oscillator (LIRC) is adopted as clock source) NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 38 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.3.4 Frequency Divider Output This device is equipped with a power-of-2 frequency divider which is composed by16 chained divide-by-2 shift registers. One of the 16 shift register outputs selected by a sixteen to one multiplexer is reflected to CLKO function pin. Therefore there are 16 options of power-of-2 divided clocks with the frequency from Fin/21 to Fin/216 where Fin is input clock frequency to the clock divider. The output formula is Fout = Fin/2(N+1), where Fin is the input clock frequency, Fout is the clock divider output frequency and N is the 4-bit value in FSEL (FRQDIV[3:0]). When writing 1 to DIVIDER_EN (FRQDIV[4]), the chained counter starts to count. When writing 0 to DIVIDER_EN (FRQDIV[4]), the chained counter continuously runs till divided clock reaches low state and stay in low state. If DIVIDER1(FRQDIV[5]) is set to 1, the frequency divider clock (FRQDIV_CLK) will bypass power-of-2 frequency divider. The frequency divider clock will be output to CLKO pin directly. FRQDIV_S (CLKSEL2[3:2]) FDIV_EN (APBCLK[6]) 22.1184 MHz 11 FRQDIV_CLK HCLK 10 Reserved 01 00 Figure 6-7 Clock Source of Frequency Divider DIVIDER_EN (FRQDIV[4]) Enable divide-by-2 counter FRQDIV_CLK 1/2 1/22 FSEL (FRQDIV[3:0]) 16 chained divide-by-2 counter 1/23 …... 1/215 DIVIDER1 (FRQDIV[5]) 1/216 0000 0001 : : 1110 1111 16 to 1 MUX 0 CLKO 1 Figure 6-8 Frequency Divider Block Diagram Oct 31, 2014 Page 39 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET 4~24 MHz NuMicro NUC131 Series Datasheet 6.4 Flash Memory Controller (FMC) 6.4.1 Overview The NuMicro NUC131 series has 68/36K bytes on-chip embedded Flash for application program memory (APROM) that can be updated through ISP procedure. The In-SystemProgramming (ISP) function enables user to update program memory when chip is soldered on PCB. After chip is powered on, Cortex™-M0 CPU fetches code from APROM or LDROM decided by boot select (CBS) in CONFIG0. By the way, the NuMicro NUC131 series also provides additional Data Flash for user to store some application dependent data. The NuMicro NUC131 supports another flexible feature: configurable Data Flash size. The Data Flash size is decided by Data Flash variable size enable (DFVSEN), Data Flash enable (DFEN) in Config0 and Data Flash base address (DFBADR) in Config1. When DFVSEN is set to 1, the Data Flash size is fixed at 4K and the address is started from 0x0001_f000, and the APROM size is become 64/32K. When DFVSEN is set to 0 and DFEN is set to 1, the Data Flash size is zero and the APROM size is 68/36K bytes. When DFVSEN is set to 0 and DFEN is set to 0, the APROM and Data Flash share 68/36K bytes continuous address and the start address of Data Flash is defined by (DFBADR) in Config1. 6.4.2 Features NUMICRO™ NUC131 SERIES DATASHEET  Runs up to 50 MHz with zero wait cycle for continuous address read access  All embedded flash memory supports 512 bytes page erase  68/36 KB application program memory (APROM)  4KB In-System-Programming (ISP) loader program memory (LDROM)  Configurable Data Flash size  512 bytes page erase unit  Supports In-Application-Programming (IAP) to switch code between APROM and LDROM without reset  In-System-Programming (ISP) to update on-chip Flash Oct 31, 2014 Page 40 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.5 General Purpose I/O (GPIO) 6.5.1 Overview The NuMicro NUC131 series has up to 56 General Purpose I/O pins to be shared with other function pins depending on the chip configuration. These 56 pins are arranged in 6 ports named as GPIOA, GPIOB, GPIOC, GPIOD, GPIOE and GPIOF. The GPIOA/B port has the maximum of 16 pins. The GPIOC port has the maximum of 12 pins. The GPIOD port has the maximum of 4 pins. The GPIOE port has the maximum of 1 pin. The GPIOF port has the maximum of 7 pins. Each of the 56 pins is independent and has the corresponding register bits to control the pin mode function and data. The I/O type of each of I/O pins can be configured by software individually as input, output, opendrain or Quasi-bidirectional mode. After reset, the I/O mode of all pins are depending on Config0[10] setting. In Quasi-bidirectional mode, I/O pin has a very weak individual pull-up resistor which is about 110~300 K for VDD from 5.0 V to 2.5 V. 6.5.2 Features  Four I/O modes: - Quasi-bidirectional - Push-Pull output - Open-Drain output - Input only with high impendence TTL/Schmitt trigger input selectable by GPx_TYPE[15:0] in GPx_MFP[31:16]  I/O pin configured as interrupt source with edge/level setting  Configurable default I/O mode of all pins after reset by Config0[10] setting - If Config[10] is 0, all GPIO pins in input tri-state mode after chip reset - If Config[10] is 1, all GPIO pins in Quasi-bidirectional mode after chip reset  I/O pin internal pull-up resistor enabled only in Quasi-bidirectional I/O mode  Enabling the pin interrupt function will also enable the pin wake-up function Oct 31, 2014 Page 41 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET  NuMicro NUC131 Series Datasheet 6.6 Timer Controller (TIMER) 6.6.1 Overview The timer controller includes four 32-bit timers, TIMER0 ~ TIMER3, allowing user to easily implement a timer control for applications. The timer can perform functions, such as frequency measurement, delay timing, clock generation, and event counting by external input pins, and interval measurement by external capture pins. 6.6.2 Features NUMICRO™ NUC131 SERIES DATASHEET  Four sets of 32-bit timers with 24-bit up counter and one 8-bit prescale counter  Independent clock source for each timer  Provides four timer counting modes: one-shot, periodic, toggle and continuous counting  Time-out period = (Period of timer clock input) * (8-bit prescale counter + 1) * (24-bit TCMP)  Maximum counting cycle time = (1 / T MHz) * (28) * (224), T is the period of timer clock  24-bit up counter value is readable through TDR (Timer Data Register)  Supports event counting function to count the event from external counter pin (TM0~TM3)  Supports external pin capture (TM0_EXT~TM3_EXT) for interval measurement  Supports external pin capture (TM0_EXT~TM3_EXT) for reset 24-bit up counter  Supports chip wake-up from Idle/Power-down mode if a timer interrupt signal is generated Oct 31, 2014 Page 42 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.7 PWM Generator and Capture Timer (PWM) 6.7.1 Overview The NUC131 provides two PWM generators － PWM0 and PWM1. Each PWM supports 6 channels of PWM output or input capture. There is a 12-bit prescaler to support flexible clock to the 16-bit PWM counter with 16-bit comparator. The PWM counter supports up, down and updown counter types. PWM uses the comparator compared with counter to generate events. These events are used to generate PWM pulse, interrupt and trigger signal for ADC to start conversion. The PWM generator supports two standard PWM output modes: Independent mode and Complementary mode, which have difference architecture. In Complementary mode, there are two comparators to generate various PWM pulse with 12-bit dead-time generator. For PWM output control unit, it supports polarity output, independent pin mask, tri-state output enable and brake functions. The PWM generator also supports input capture function to latch PWM counter value to the corresponding register when input channel has a rising transition, falling transition or both transition is happened. 6.7.2 Features 6.7.2.1 PWM function features Supports maximum clock frequency up to100 MHz  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 3 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, each module provides 3 PWM counters  Up, down and up/down counter operation type  Supports mask function and tri-state enable for each PWM pin  Supports brake function   Oct 31, 2014  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: Page 43 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET  NuMicro NUC131 Series Datasheet  PWM counter match zero, period value or compared value 6.7.2.2 Capture Function Features  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 6.7.2.3 Compare table Feature PWM BPWM 2 channels share 1 timer, total 6 timers 6 channels share 1 timer, total 1 timer Complementary mode V X Dead-time function V X Brake function V X Capture reload 2 channels reload 1 timer 6 channels reload 1 timer Counter number Table 6-5 PWM and BPWM Features Different Table NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 44 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.8 Basic PWM Generator and Capture Timer (BPWM) 6.8.1 Overview The NUC131 provides two BPWM generators － BPWM0 and BPWM1. Each BPWM supports 6 channels of BPWM output or input capture. There is a 12-bit prescaler to support flexible clock to the 16-bit BPWM counter with 16-bit comparator. The BPWM counter supports up, down and updown counter types, all 6 channels share one counter. BPWM uses the comparator compared with counter to generate events. These events are used to generate BPWM pulse, interrupt and trigger signal for ADC to start conversion. For BPWM output control unit, it supports polarity output, independent pin mask and tri-state output enable. The BPWM generator also supports input capture function to latch BPWM counter value to corresponding register when input channel has a rising transition, falling transition or both transition is happened. 6.8.2 Features 6.8.2.1 BPWM function features Supports maximum clock frequency up to100 MHz  Supports up to two BPWM modules, each module provides 6 output channels  Supports independent mode for BPWM output/Capture input channel  Supports 12-bit pre-scalar from 1 to 4096  Supports 16-bit resolution BPWM counter, each module provides 1 BPWM counter  Up, down and up/down counter operation type  Supports mask function and tri-state enable for each BPWM pin  Supports interrupt on the following events:   Supports trigger ADC on the following events:  6.8.2.2 BPWM counter match zero, period value or compared value BPWM counter match zero, period value or compared value Capture Function Features  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 Oct 31, 2014 Page 45 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET  NuMicro NUC131 Series Datasheet 6.8.2.3 Compare table Feature PWM BPWM 2 channels share 1 timer, total 6 timers 6 channels share 1 timer, total 1 timer Complementary mode V X Dead-time function V X Brake function V X Capture reload 2 channels reload 1 timer 6 channels reload 1 timer Counter number Table 6-6 PWM and BPWM Features Different Table NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 46 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.9 Watchdog Timer (WDT) 6.9.1 Overview The purpose of Watchdog Timer is to perform a system reset when system runs into an unknown state. This prevents system from hanging for an infinite period of time. Besides, this Watchdog Timer supports the function to wake-up system from Idle/Power-down mode. 6.9.2 Features  18-bit free running up counter for Watchdog Timer time-out interval.  Selectable time-out interval (24 ~ 218) WDT_CLK cycle and the time-out interval period is 104 ms ~ 26.3168 s if WDT_CLK = 10 kHz.  System kept in reset state for a period of (1 / WDT_CLK) * 63  Supports Watchdog Timer reset delay period - Selectable it includes (1026、130、18 or 3) * WDT_CLK reset delay period.  Supports to force Watchdog Timer enabled after chip powered on or reset while CWDTEN (CONFIG0[31] Watchdog Enable) bit is set to 0.  Supports Watchdog Timer time-out wake-up function only if WDT clock source is selected as 10 kHz NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 47 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.10 Window Watchdog Timer (WWDT) 6.10.1 Overview The Window Watchdog Timer is used to perform a system reset within a specified window period to prevent software run to uncontrollable status by any unpredictable condition. 6.10.2 Features  6-bit down counter value (WWDTVAL[5:0]) and 6-bit compare window value (WWDTCR[21:16]) to make the WWDT time-out window period flexible  Supports 4-bit value to programmable maximum 11-bit prescale counter period of WWDT counter NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 48 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.11 UART Interface Controller (UART) 6.11.1 Overview The NuMicro NUC131 series provides up to six channels of Universal Asynchronous Receiver/Transmitters (UART). UART0/UART1/UART2 supports 16 bytes entry FIFO and UART3/UART4/UART5 support 1 byte buffer for data payload. Besides, only UART0 and UART1 support the flow control function. The UART Controller performs a serial-to-parallel conversion on data received from the peripheral, and a parallel-to-serial conversion on data transmitted from the CPU. The UART controller also supports IrDA SIR Function. UART0/UART1 provides RS-485 function mode. UART0/UART1/UART2 provides LIN master/slave function. 6.11.2 Features Full duplex, asynchronous communications  Separates receive / transmit 16/16 bytes (UART0/UART1/UART2 support) entry FIFO and 1/1 bytes buffer for data payloads (UART3/UART4/UART5 support)  Supports hardware auto-flow control function (CTS, RTS) and programmable RTS flow control trigger level (UART0/UART1 support).  Programmable receiver buffer trigger level  Supports programmable baud-rate generator for each channel individually  Supports CTS wake-up function (UART0/UART1 support)  Supports 7-bit receiver buffer time-out detection function  Programmable transmitting data delay time between the last stop and the next start bit by setting DLY (UA_TOR [15:8]) register  Supports break error, frame error, parity error and receive / transmit buffer overflow detect function  Fully programmable serial-interface characteristics  - Programmable data bit length, 5-, 6-, 7-, 8-bit character - Programmable parity bit, even, odd, no parity or stick parity bit generation and detection - Programmable stop bit length, 1, 1.5, or 2 stop bit generation IrDA SIR function mode -   Oct 31, 2014 Supports 3/16-bit duration for normal mode LIN function mode (UART0/UART1/UART2 support) - Supports LIN master/slave mode - Supports programmable break generation function for transmitter - Supports break detect function for receiver RS-485 function mode. (UART0/UART1 support) - Supports RS-485 9-bit mode - Supports hardware or software direct enable control provided by RTS pin. Page 49 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET  NuMicro NUC131 Series Datasheet 6.12 I2C Serial Interface Controller (I2C) 6.12.1 Overview I2C is a two-wire, bi-directional serial bus that provides a simple and efficient method of data exchange between devices. The I2C standard is a true multi-master bus including collision detection and arbitration that prevents data corruption if two or more masters attempt to control the bus simultaneously. 6.12.2 Features The I2C bus uses two wires (I2Cn_SDA and I2Cn_SCL) to transfer information between devices connected to the bus. The main features of the I2C bus include: NUMICRO™ NUC131 SERIES DATASHEET  Supports up to two I2C serial interface controller  Master/Slave mode  Bidirectional data transfer between masters and slaves  Multi-master bus (no central master)  Arbitration between simultaneously transmitting masters without corruption of serial data on the bus  Serial clock synchronization allow devices with different bit rates to communicate via one serial bus  Built-in a 14-bit time-out counter requesting the I2C interrupt if the I2C bus hangs up and timer-out counter overflows.  Programmable clocks allow for versatile rate control  Supports 7-bit addressing mode  Supports multiple address recognition ( four slave address with mask option)  Supports Power-down wake-up function Oct 31, 2014 Page 50 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.13 Serial Peripheral Interface (SPI) 6.13.1 Overview The Serial Peripheral Interface (SPI) is a synchronous serial data communication protocol that operates in full duplex mode. Devices communicate in Master/Slave mode with the 4-wire bidirection interface. The NuMicro NUC131 series contains one set of SPI controllers performing a serial-to-parallel conversion on data received from a peripheral device, and a parallel-to-serial conversion on data transmitted to a peripheral device. This SPI controller can be configured as a master or a slave device. The SPI controller supports the variable bus clock function for special applications. 6.13.2 Features One set of SPI controller  Supports Master or Slave mode operation  Supports Dual I/O Transfer mode  Configurable bit length of a transaction word from 8 to 32 bits  Provides separate 8-layer depth transmit and receive FIFO buffers  Supports MSB first or LSB first transfer sequence  Supports the Byte Reorder function  Supports Byte or Word Suspend mode  Variable output bus clock frequency in Master mode  Supports 3-wire, no slave select signal, bi-direction interface Oct 31, 2014 Page 51 of 75 NUMICRO™ NUC131 SERIES DATASHEET  Revision 1.00 NuMicro NUC131 Series Datasheet 6.14 Controller Area Network (CAN) 6.14.1 Overview The C_CAN consists of the CAN Core, Message RAM, Message Handler, Control Registers and Module Interface. The CAN Core performs communication according to the CAN protocol version 2.0 part A and B. The bit rate can be programmed to values up to 1MBit/s. For the connection to the physical layer, additional transceiver hardware is required. For communication on a CAN network, individual Message Objects are configured. The Message Objects and Identifier Masks for acceptance filtering of received messages are stored in the Message RAM. All functions concerning the handling of messages are implemented in the Message Handler. These functions include acceptance filtering, the transfer of messages between the CAN Core and the Message RAM, and the handling of transmission requests as well as the generation of the module interrupt. The register set of the C_CAN can be accessed directly by the software through the module interface. These registers are used to control/configure the CAN Core and the Message Handler and to access the Message RAM. 6.14.2 Features NUMICRO™ NUC131 SERIES DATASHEET  Supports CAN protocol version 2.0 part A and B.  Bit rates up to 1 MBit/s.  32 Message Objects.  Each Message Object has its own identifier mask.  Programmable FIFO mode (concatenation of Message Objects).  Maskable interrupt.  Disabled Automatic Re-transmission mode for Time Triggered CAN applications.  Programmable loop-back mode for self-test operation.  16-bit module interfaces to the AMBA APB bus.  Supports wake-up function Oct 31, 2014 Page 52 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 6.15 Analog-to-Digital Converter (ADC) 6.15.1 Overview The NuMicro NUC131 series contains one 12-bit successive approximation analog-to-digital converters (SAR A/D converter) with 8 input channels. The A/D converter supports three operation modes: single, single-cycle scan and continuous scan mode. The A/D converter can be started by software, PWM, BPWM trigger and external STADC pin. 6.15.2 Features  Analog input voltage range: 0~VREF  12-bit resolution and 10-bit accuracy is guaranteed  Up to 8 single-end analog input channels or 4 differential analog input channels  Up to 1 MSPS conversion rate (chip working at 5V)  Three operating modes Single mode: A/D conversion is performed one time on a specified channel - Single-cycle scan mode: A/D conversion is performed one cycle on all specified channels with the sequence from the smallest numbered channel to the largest numbered channel - Continuous scan mode: A/D converter continuously performs Single-cycle scan mode until software stops A/D conversion An A/D conversion can be started by: - Writing 1 to ADST bit (ADCR[11])through software - PWM and BPWM trigger - External pin STADC  Conversion results are held in data registers for each channel with valid and overrun indicators  Supports two set digital comparators. The conversion result can be compared with specify value and user can select whether to generate an interrupt when conversion result matches the compare register setting  Channel 7 supports 2 input sources: external analog voltage, and internal Band-gap voltage Oct 31, 2014 Page 53 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET  - NuMicro NUC131 Series Datasheet 7 APPLICATION CIRCUIT AVCC AVDD DVCC Power DVCC [1] FB VDD SPISS0 SPICLK0 MISO_0 0.1uF 0.1uF VSS CS CLK MISO MOSI MOSI_0 FB VDD SPI Device VSS AVSS DVCC 4.7K VDD ICE_CLK ICE_DAT nRST VSS SWD Interface DVCC 4.7K CLK SCL SDA DIO 20p XT1_IN Crystal I2C Device VSS NUC131 Series 4~24 MHz crystal 20p VDD CAN Transceiver ODB Port XT1_OUT CAN_TX D CAN_H CAN_RX R CAN_L CAN DVCC NUMICRO™ NUC131 SERIES DATASHEET RS232 Transceiver Reset Circuit 10K nRESET RXD ROUT TXD TIN PC COM Port RIN TOUT UART 10uF/25V LDO_CAP 1uF LDO Oct 31, 2014 Note: For the SPI device, the chip supply voltage must be equal to SPI device working voltage. For example, when the SPI Flash working voltage is 3.3 V, the NUC131 chip supply voltage must also be 3.3V. Page 54 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 8 ELECTRICAL CHARACTERISTICS 8.1 Absolute Maximum Ratings SYMBOL PARAMETER MIN. MAX UNIT VDDVSS -0.3 +7.0 V VIN VSS-0.3 VDD+0.3 V 1/tCLCL 4 24 MHz Operating Temperature TA -40 +105 C Storage Temperature TST -55 +150 C - 120 mA Maximum Current out of VSS 120 mA Maximum Current sunk by a I/O pin 35 mA Maximum Current sourced by a I/O pin 35 mA Maximum Current sunk by total I/O pins 100 mA Maximum Current sourced by total I/O pins 100 mA DC Power Supply Input Voltage Oscillator Frequency Maximum Current into VDD Note: Exposure to conditions beyond those listed under absolute maximum ratings may adversely affects the lift and reliability of the device. NUMICRO™ NUC131 SERIES DATASHEET Oct 31, 2014 Page 55 of 75 Revision 1.00 NuMicro NUC131 Series Datasheet 8.2 DC Electrical Characteristics (VDD-VSS=5.5 V, TA = 25C, FOSC = 50 MHz unless otherwise specified.) SPECIFICATION PARAMETER SYM. TEST CONDITIONS MIN. Operation Voltage Power Ground VDD VSS AVSS LDO Output Voltage VLDO Band-gap Voltage VBG TYP. 2.5 MAX. UNIT 5.5 V -0.3 0 0.3 V 1.62 1.8 1.98 V VDD ≥ 2.5V V VDD = 2.5 V ~ 5.5 V, TA = 25C V VDD = 2.5 V ~ 5.5 V, TA = -40C~105C V When system used analog function, please refer to TRM chapter 6.5 for corresponding analog operating voltage 1.20 1.19 Analog Operating Voltage Operating Current VDD = 2.5V ~ 5.5V up to 50 MHz AVDD 1.20 1.22 VDD IDD1 26 VDD HXT HIRC PLL All digital module 5.5V 12 MHz X V V mA Normal Run Mode NUMICRO™ NUC131 SERIES DATASHEET at 50 MHz while(1){} executed from flash VLDO =1.8 V Operating Current IDD2 12 mA 5.5V 12 MHz X V X IDD3 24 mA 3.3V 12 MHz X V V IDD4 11 mA 3.3V 12 MHz X V X IDD5 - 10 - mA 5.5V X V X V IDD6 - 4.1 - mA 5.5V X V X X while(1){} executed from flash IDD7 - 10 - mA 3.3V X V X V VLDO =1.8 V IDD8 - 4.1 - mA 3.3V X V X X Operating Current IDD9 8.3 mA 5.5V 12 MHz X X V IDD10 4.3 mA 5.5V 12 MHz X X X while(1){} executed from flash IDD11 6.8 mA 3.3V 12 MHz X X V VLDO =1.8 V IDD12 2.8 mA 3.3V 12 MHz X X X Operating Current IDD13 3.9 mA 5.5V 4 MHz X X V IDD14 2.6 mA 5.5V 4 MHz X X X while(1){} executed from flash IDD15 2.6 mA 3.3V 4 MHz X X V VLDO =1.8 V IDD16 1.3 mA 3.3V 4 MHz X X X Operating Current IDD21 111 A VDD PLL All digital module Normal Run Mode at 22.1184 MHz Normal Run Mode at 12 MHz Normal Run Mode at 4 MHz Oct 31, 2014 Page 56 of 75 HXT/LXT LIRC (kHz) Revision 1.00 NuMicro NUC131 Series Datasheet SPECIFICATION PARAMETER SYM. TEST CONDITIONS MIN. TYP. MAX. UNIT Normal Run Mode at 10 kHz while(1){} executed from flash VLDO =1.8 V Operating Current 5.5V X 10 X V IDD22 108 A 5.5V X 10 X X IDD23 98 A 3.3V X 10 X V IDD24 96 A 3.3V X 10 X X VDD HXT HIRC PLL All digital module 5.5V 12 MHz X V V IIDLE1 21 mA Idle Mode at 50 MHz IIDLE2 8 mA 5.5V 12 MHz X V X VLDO =1.8 V IIDLE3 20 mA 3.3V 12 MHz X V V IIDLE4 6.7 mA 3.3V 12 MHz X V X IIDLE5 - 7.7 - mA 5.5V X V X X Idle Mode IIDLE6 - 2.1 - mA 5.5V X V X X at 22.1184 MHz IIDLE7 - 7.7 - mA 3.3V X V X V IIDLE8 - 2.1 - mA 3.3V X V X X Operating Current VLDO =1.8 V Idle Mode at 12 MHz IIDLE9 7.3 mA 5.5V 12 MHz X X V IIDLE10 3.2 mA 5.5V 12 MHz X X X IIDLE11 5.8 mA 3.3V 12 MHz X X V IIDLE12 1.7 mA 3.3V 12 MHz X X X IIDLE13 3.6 mA 5.5V 4 MHz X X V IIDLE14 2.2 mA 5.5V 4 MHz X X X IIDLE15 2.3 mA 3.3V 4 MHz X X V IIDLE16 0.96 mA 3.3V 4 MHz X X X PLL All digital module VLDO =1.8 V Operating Current Idle Mode at 4 MHz VLDO =1.8 V IIDLE21 110 A Operating Current Idle Mode VDD HXT/LXT LIRC (kHz) 5.5V X 10 X V IIDLE22 107 A 5.5V X 10 X X IIDLE23 97 A 3.3V X 10 X V IIDLE24 95 A 3.3V X 10 X X LXT (kHz) RTC RAM retension at 10 kHz Standby Current Power-down Mode IPWD1 15 A (Deep Sleep Mode) VLDO =1.6 V Oct 31, 2014 IPWD2 15 A VDD HXT/HIRC PLL 5.5V X X X V 5.5V X X X V Page 57 of 75 Revision 1.00 NUMICRO™ NUC131 SERIES DATASHEET Operating Current NuMicro NUC131 Series Datasheet SPECIFICATION PARAMETER SYM. TEST CONDITIONS MIN. TYP. MAX. UNIT IPWD3 17 A 3.3V X 32.768 V V IPWD4 17 A 3.3V X 32.768 V V IPWD5 10 A 5.5V X X X X IPWD6 9 A 3.3V X X X X Input Current PA, PB, PC, PD, PE, PF (Quasi-bidirectional mode) IIN1 -67 -75 A Input Leakage Current PA, PB, PC, PD, PE, PF ILK - +1 A -610 -650 A - 0.8 Logic 1 to 0 Transition Current PA~PF (Quasibidirectional mode) ITL Input Low Voltage PA, PB, PC, PD, PE, PF (TTL input) VIL1 [3] -0.3 NUMICRO™ NUC131 SERIES DATASHEET Input High Voltage PA, PB, PC, PD, PE, PF (TTL input) VIH1 Input Low Voltage [*2] XT1_IN VIL3 Input High Voltage [*2] XT1_IN Negative going threshold (Schmitt input), nRESET Positive going threshold (Schmitt input), nRESET Internal nRESET pin pull up resistor Negative going threshold -1 (Schmitt input), Oct 31, 2014 VDD = 5.5V, 0