Datasheet BA45F5440 (Holtek) - 9

BA45F5440 BA45F5440 9V High Voltage Smoke Detector Flash MCU 9V High Voltage Smoke Detector Flash MCU
MODE functions which are bonded to external Pin 14 and Pin 15 respectively, are always enabled after power on. 2. The unbonded lines, which are PB0~PB3 in the 20-pin SSOP package and PA7, PB0, PB3, PB4 in the 20-pin SOP package, should be properly configured to avoid unwanted current consumption resulting from floating input conditions. Refer to the “Standby Current Considerations” and “Input/Output Ports” sections. 3. The OCDSDA and OCDSCK pins are the OCDS dedicated pins and only available for the EV chip with the part number BA45V5440. It should be noted that for the 20-pin SSOP package type of the MCU, there is no corresponding OCDS EV chip. 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 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/SCL/SCK/ SCL IFS0 PAS0 ST NMOS I2C clock line ICPDA/OCDSDA SCK IFS0 PAS0 ST CMOS SPI serial clock 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 INTEG ST — External Interrupt 1 PA1/INT1/SCS/AN2/A1PI INTC0 SCS IFS0 PAS0 ST CMOS SPI slave device select AN2 PAS0 AN — A/D Converter input channel 2 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 IFS0 PAS0 ST — SPI serial data input PA2/SDI/SDA/RX/ ICPCK/OCDSCK SDA IFS0 PAS0 ST NMOS I2C data line RX IFS0 PAS0 ST — UART receiver pin ICPCK — ST — ICP clock pin OCDSCK — ST — OCDS clock pin, for EV chip only Rev. 1.00 8 September 03, 2020 Rev. 1.00 9 September 03, 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 Frequency Accuracy Low Speed Internal Oscillator Characteristics – LIRC System Start Up Time Characteristics Input/Output Characteristics Memory Characteristics LVD & LVR Electrical Characteristics A/D Converter Electrical Characteristics Internal Reference Voltage Characteristics Sink Current Generator Electrical Characteristics Operational Amplifier Electrical Characteristics – Smoke Detector AFE 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 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 Source Current Selection 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 Operation Modes Smoke Detector AFE Smoke Detector AFE Registers 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 Universal Serial Interface Module – USIM SPI Interface I2C Interface UART Interface Low Voltage Detector – LVD LVD Register LVD Operation Interrupts Interrupt Registers Interrupt Operation External Interrupt A/D Converter Interrupt Time Base Interrupts USIM 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 20-pin SSOP (150mil) Outline Dimensions