Nuvoton NuMicro MS51FB9AE - User Manual

MS51
Dec. 17, 2019 Page 1 of 316 Rev 1.01
MS51 SERIES TECHNICAL REFERENCE MANUAL
1T 8051
8-bit Microcontroller
NuMicro
®
Family
MS51 Series
MS51FB9AE
MS51XB9AE
MS51XB9BE
Technical Reference Manual
The information described in this document is the exclusive intellectual property of
Nuvoton Technology Corporation and shall not be reproduced without permission from Nuvoton.
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

Summary

GENERAL DESCRIPTION

FEATURES

Core and System

Core and system features of the microcontroller.

Memories

Details Flash, SRAM, and XRAM memory organization.

Clocks

Lists internal clock sources like HIRC and LIRC.

Timers

Provides an overview of 16-bit timers and counters.

16-bit Timer

Details the two 16-bit timers/counters compatible with 8051.

Watchdog

Describes the Watchdog Timer functionality and intervals.

Wake-up Timer

Explains the Self Wake-Up Timer functionality.

PWM

Details Pulse Width Modulation generator features.

Analog Interfaces

Covers analog input voltage range and general interface.

Analog-to-Digital Converter (ADC)

Describes ADC resolution, channels, and sampling rate.

Communication Interfaces

Lists UART, I2C, and SPI communication interfaces.

UART

Details UART capabilities including duplex and pin exchange.

I2 C

Explains I2C features like modes, speeds, and hold time.

SPI

Covers SPI modes, transfer sequence, and clock speed.

GPIO

PARTS INFORMATION

MS51 Series Selection Guide

MS51 Series Selection Code

PIN CONFIGURATION

MS51 16 KB Series Multi Function Pin Diagram

MS51 16 KB Series Pin Description

BLOCK DIAGRAM

MS51 16 KB Series Block Diagram

FUNCTION DESCRIPTION

Memory Organization

Describes the division of memory into Program and Data memory.

Program Memory

Config Bytes

Data Memory

Details internal RAM, SFR space, and XRAM.

Internal Data Memory

On-Chip XRAM

Special Function Register (SFR)

Covers SFRs for peripheral control and monitoring.

System Manager

Manages system clock, power, reset, and interrupt functions.

Clock System

Discusses clock sources, dividers, and output.

System Clock Sources

Internal Oscillators

System Clock Switching

System Clock Divider

Power Management

Covers low power modes like Idle and Power-down.

Idle Mode

Explains CPU suspension and exit conditions.

Power-Down Mode

Details the lowest power state with clock stop.

Power Monitoring And Reset

Discusses power monitoring and reset sources.

Power-On Reset and Low Voltage Reset

Brown-Out Detect and Reset

External Reset and Hard Fault Reset

Watchdog Timer Reset

Explains WDT functionality for system reset.

Software Reset

Boot Select

Interrupt System

Introduces the interrupt structure.

Enabling Interrupts

Interrupt Priorities

Interrupt Service

External Interrupt Pins

Flash Memory Contorl

Covers flash memory operations like IAP and ICP.

In-Application-Programming (IAP)

Explains IAP for flash memory programming via software.

IAP Commands

IAP User Guide

Using Flash Memory as Data Storage

In-Circuit-Programming (ICP)

ON-CHIP-DEBUGGER (OCD)

General Purpose IO (GPIO)

Covers general purpose input/output pins and their configurations.

GPIO Mode

Explains I/O modes like push-pull, input-only, etc.

Control Registers of GPIO

GPIO Mode Control

Pin Interrupt

Timer

Covers the functionality of Timer/Counter modules.

Timer;Counter 0 And 1

Describes the two 16-bit timers/counters.

Mode 0 (13-Bit Timer)

Mode 1 (16-Bit Timer)

Mode 2 (8-Bit Auto-Reload Timer)

Mode 3 (Two Separate 8-Bit Timers)

Timer2 And Input Capture

Describes Timer 2 and its 3-channel input capture module.

Auto-Reload Mode

Input Capture Module

Compare Mode

Timer3

Describes the 16-bit auto-reload timer with pre-scalar.

Watchdog Timer (WDT)

Covers WDT functionality for system reset and timing.

Time-Out Reset Timer

Explains WDT configuration for time-out reset.

General Purpose Timer

Self Wake-Up Timer (WKT)

Details the WKT for periodic wake-up or general timing.

Serial Port (UART0 & UART1)

Covers UART functionality, modes, and baud rate calculation.

Operating Mode

Explains the different operating modes for UART.

Mode 0

Mode 1

Mode 2

Mode 3

Baud Rate

Multiprocessor Communication

Automatic Address Recognition

Serial Peripheral Interface (SPI)

Covers SPI functionality, modes, and clocking.

Operating Modes

Explains the different operating modes for SPI.

Master Mode

Slave Mode

Clock Formats and Data Transfer

SPI Interrupt

Inter-Integrated Circuit (I2 C)

Covers I2C interface functionality, modes, and control.

Functional Description

Explains the I2C interface and its physical implementation.

START and STOP Condition

7-Bit Address with Data Format

Acknowledge

Arbitration

Master Transmitter Mode

Master Receiver Mode

Slave Receiver

Slave Transmitter

I2 CON - I2 C Control

Pulse Width Modulated (PWM)

Covers PWM signal generation and control.

PWM Generator

Describes the PWM generator architecture and registers.

PWM Types

Explains the different PWM output types.

Edge-Aligned Type

Center-Aligned Type

Operation Modes

Explains the different operating modes for PWM.

Complementary Mode with Dead-Time Insertion

Fault Brake

PWM Interrupt

Control Register

12-Bit Analog-To-Digital Converter (ADC)

Covers ADC functionality, operation, and configuration.

ADC Operation

Explains how the ADC circuit is enabled and operates.

ADC Conversion Triggered by External Source

ADC Conversion Result Comparator

Control Registers

ADCCON0 - ADC Control 0

ADCCON1 - ADC Control 1

ADCCON2 - ADC Control 2

Auxiliary Features

Dual DPTRs

Nuvoton NuMicro MS51FB9AE Specifications

General

Core	8051
RAM	1 KB
Max Clock Frequency	24 MHz
ADC Channels	8
ADC Resolution	12-bit
Timers	3
UART	1
SPI	1
I2C	1
PWM Channels	6
Watchdog Timer	Yes
Brown-out Detector	Yes
Operating Voltage	2.5V to 5.5V
Operating Temperature	-40°C ~ 105°C