Datasheet BA45F5450 (Holtek) - 10

BA45F5450 BA45F5450 9V High Voltage Smoke Detector Flash MCU 9V High Voltage Smoke Detector Flash MCU
resulting from floating input conditions. Refer to the “Standby Current Considerations” and “Input/Output Ports” sections. 4. In general smoke detector applications, the VREG pin should be externally connected to the VDD pin for normal operation.
Pin Description
The function of each pin is listed in the following table, however the details behind how each pin is configured is contained in other sections of the datasheet. As the Pin Description table shows the situation for the package type with the most pins, not all pins in the table will be available on smaller package sizes.
Pin Name Function OPT I/T O/T Description
PAPU PA0 PAWU ST CMOS General purpose I/O. Register enabled pull-high PAS0 and wake-up PA0/SCK/SCL/ICPDA/ SCK PAS0 IFS0 ST CMOS SPI serial clock OCDSDA SCL PAS0 IFS0 ST NMOS I2C clock line ICPDA — ST CMOS ICP data/address OCDSDA — ST CMOS OCDS data/address, for EV chip only PAPU PA1 PAWU ST CMOS General purpose I/O. Register enabled pull-high PAS0 and wake-up PAS0 INT1 INTC0 ST — External Interrupt 1 PA1/INT1/SCS/A1O/A1PI INTEG SCS PAS0 IFS0 ST CMOS SPI slave device select A1O PAS0 — AN Operational Amplifier 1 output A1PI PAS0 AN — SD Operational Amplifier 1 positive input PAPU PA2 PAWU ST CMOS General purpose I/O. Register enabled pull-high PAS0 and wake-up SDI PAS0 IFS0 ST — SPI serial data input PA2/SDI/SDA/RX/ICPCK/ OCDSCK SDA PAS0 IFS0 ST NMOS I2C data line RX PAS0 IFS1 ST — UART receiver pin ICPCK — ST — ICP clock pin OCDSCK — ST — OCDS clock pin, for EV chip only PAPU PA3 PAWU ST CMOS General purpose I/O. Register enabled pull-high PAS0 and wake-up PAS0 INT0 INTC0 INTEG ST — External Interrupt 0 PA3/INT0/STP1I/SDO/TX/ IFS1 AN3/MODE STP1I PAS0 ST — STM1 capture input SDO PAS0 — CMOS SPI serial data output TX PAS0 — CMOS UART transmitter pin AN3 PAS0 AN — A/D converter external input channel MODE — ST — Piezoelectric horn driver mode select – feedback/non-feedback Rev. 1.00 10 June 15, 2020 Rev. 1.00 11 June 15, 2020 Document Outline Features CPU Features Peripheral Features General Description Block Diagram Pin Assignment Pin Description Absolute Maximum Ratings D.C. Characteristics Operating Voltage Characteristics Operating Current Characteristics Standby Current Characteristics A.C. Characteristics High Speed Internal Oscillator – HIRC – Frequency Accuracy Low Speed Internal Oscillator – LIRC System Start Up Time Characteristics Input/Output Characteristics Memory Characteristics LVD & LVR Electrical Characteristics A/D Converter Electrical Characteristics Reference Voltage Characteristics Sink Current Generator Electrical Characteristics Sink Current Generator Characteristic Curves Operational Amplifier Electrical Characteristics – Smoke Detector AFE 16-bit Voice D/A Converter Electrical Characteristics LDO Electrical Characteristics Piezoelectric Horn Driver Characteristics Power-on Reset Characteristics System Architecture Clocking and Pipelining Program Counter Stack Arithmetic and Logic Unit – ALU Flash Program Memory Structure Special Vectors Look-up Table Table Program Example In Circuit Programming – ICP On Chip Debug Support – OCDS In Application Programming – IAP Data Memory Structure Data Memory Addressing General Purpose Data Memory Special Purpose Data Memory Special Function Register Description Indirect Addressing Registers – IAR0, IAR1, IAR2 Memory Pointers – MP0, MP1L, MP1H, MP2L, MP2H Accumulator – ACC Program Counter Low Register – PCL Look-up Table Registers – TBLP, TBHP, TBLH Status Register – STATUS EEPROM Data Memory EEPROM Data Memory Structure EEPROM Registers Reading Data from the EEPROM Writing Data to the EEPROM Write Protection EEPROM Interrupt Programming Considerations Oscillators Oscillator Overview System Clock Configurations Internal High Speed RC Oscillator – HIRC Internal 32kHz Oscillator – LIRC Operating Modes and System Clocks System Clocks System Operation Modes Control Registers Operating Mode Switching Standby Current Considerations Wake-up Watchdog Timer Watchdog Timer Clock Source Watchdog Timer Control Register Watchdog Timer Operation Reset and Initialisation Reset Functions Reset Initial Conditions Input/Output Ports Pull-high Resistors Port A Wake-up I/O Port Control Registers I/O Port Source Current Control Pin-shared Functions I/O Pin Structures Programming Considerations Timer Modules – TM Introduction TM Operation TM Clock Source TM Interrupts TM External Pins Programming Considerations Standard Type TM – STM Standard TM Operation Standard Type TM Register Description Standard Type TM Operation Modes Periodic Type TM – PTM Periodic TM Operation Periodic Type TM Register Description Periodic Type TM Operating Modes Smoke Detector AFE Smoke Detector AFE Registers Operational Amplifier Operation Operational Amplifier Input Offset Calibration Piezoelectric Horn Driver Self-driving Mode External-driving Mode Analog to Digital Converter A/D Converter Overview A/D Converter Register Description A/D Converter Operation A/D Converter Reference Voltage A/D Converter Input Signals Conversion Rate and Timing Diagram Summary of A/D Conversion Steps Programming Considerations A/D Conversion Function A/D Conversion Programming Examples Sink Current Generator Sink Current Generator Registers 16-bit Voice D/A Converter D/A Converter Registers Serial Interface Module – SIM SPI Interface I2C Interface UART Interface UART External Pins UART Data Transfer Scheme UART Status and Control Registers Baud Rate Generator UART Setup and Control UART Transmitter UART Receiver Managing Receiver Errors UART Interrupt Structure UART Power Down and Wake-up Low Voltage Detector – LVD LVD Register LVD Operation Interrupts Interrupt Registers Interrupt Operation External Interrupts A/D Converter Interrupt Time Base Interrupts Multi-function Interrupt SIM Interrupt UART Interrupt LVD Interrupt EEPROM Interrupt TM Interrupts Interrupt Wake-up Function Programming Considerations Application Circuits External-Driving Buzzer Application Circuit Self-Driving Buzzer Application Circuit Instruction Set Introduction Instruction Timing Moving and Transferring Data Arithmetic Operations Logical and Rotate Operation Branches and Control Transfer Bit Operations Table Read Operations Other Operations Instruction Set Summary Table Conventions Extended Instruction Set Instruction Definition Extended Instruction Definition Package Information 20-pin SOP (300mil) Outline Dimensions 24-pin SOP (300mil) Outline Dimensions 28-pin SOP (300mil) Outline Dimensions