Flash MCU. BS84B08C Datasheet

BS84B08C MCU. Datasheet pdf. Equivalent

BS84B08C Datasheet
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Part BS84B08C
Description Touch A/D Flash MCU
Feature BS84B08C; Touch A/D Flash MCU BS84B08C Revision: V1.20 Date: �M�a�r�c�h�2��3,��2�0�1��8 BS84B08C Touch A/D Fl.
Manufacture Holtek Semiconductor
Datasheet
Download BS84B08C Datasheet




Holtek Semiconductor BS84B08C
Touch A/D Flash MCU
BS84B08C
Revision: V1.20 Date: �M�a�r�c�h�2��3,��2�0�1��8



Holtek Semiconductor BS84B08C
BS84B08C
Touch A/D Flash MCU
Table of Contents
Features............................................................................................................. 6
CPU Features.......................................................................................................................... 6
Peripheral Features.................................................................................................................. 6
General Description.......................................................................................... 7
Block Diagram................................................................................................... 7
Pin Assignment................................................................................................. 8
Pin Description................................................................................................. 9
Absolute Maximum Ratings........................................................................... 10
D.C. Characteristics........................................................................................ 10
Operating Voltage Characteristics.......................................................................................... 10
Standby Current Characteristics.............................................................................................11
Operating Current Characteristics...........................................................................................11
A.C. Characteristics........................................................................................ 12
High Speed Internal Oscillator – HIRC – Frequency Accuracy.............................................. 12
Low Speed Internal Oscillator Characteristics – LIRC........................................................... 12
Operating Frequency Characteristic Curves.......................................................................... 13
System Start Up Time Characteristics................................................................................... 13
A/D Converter Electrical Characteristics...................................................... 14
Input/Output Characteristics......................................................................... 14
Memory Characteristics................................................................................. 15
LVR Electrical Characteristics....................................................................... 15
Power-on Reset Characteristics.................................................................... 16
System Architecture....................................................................................... 16
Clocking and Pipelining.......................................................................................................... 16
Program Counter.................................................................................................................... 17
Stack...................................................................................................................................... 18
Arithmetic and Logic Unit – ALU............................................................................................ 18
Flash Program Memory.................................................................................. 19
Structure................................................................................................................................. 19
Special Vectors...................................................................................................................... 19
Look-up Table......................................................................................................................... 19
Table Program Example......................................................................................................... 20
In Circuit Programming – ICP................................................................................................ 21
On-Chip Debug Support – OCDS.......................................................................................... 22
Data Memory................................................................................................... 23
Structure................................................................................................................................. 23
General Purpose Data Memory............................................................................................. 23
Special Purpose Data Memory.............................................................................................. 24
Rev. 1.20
2 March 23, 2018



Holtek Semiconductor BS84B08C
BS84B08C
Touch A/D Flash MCU
Special Function Register Description......................................................... 25
Indirect Addressing Register – IAR0, IAR1............................................................................ 25
Memory Pointers – MP0, MP1............................................................................................... 25
Bank Pointer – BP.................................................................................................................. 26
Accumulator – ACC................................................................................................................ 26
Program Counter Low Register – PCL................................................................................... 26
Look-up Table Registers – TBLP, TBHP, TBLH...................................................................... 26
Status Register – STATUS..................................................................................................... 27
EEPROM Data Memory................................................................................... 29
EEPROM Data Memory Structure......................................................................................... 29
EEPROM Registers............................................................................................................... 29
Reading Data from the EEPROM.......................................................................................... 30
Writing Data to the EEPROM................................................................................................. 31
Write Protection...................................................................................................................... 31
EEPROM Interrupt................................................................................................................. 31
Programming Considerations................................................................................................. 31
Oscillators....................................................................................................... 33
Oscillator Overview................................................................................................................ 33
System Clock Configurations................................................................................................. 33
Internal RC Oscillator – HIRC................................................................................................ 34
Internal 32kHz Oscillator – LIRC............................................................................................ 34
Operating Modes and System Clocks.......................................................... 34
System Clocks....................................................................................................................... 34
System Operation Modes....................................................................................................... 35
Control Registers................................................................................................................... 36
Operating Mode Switching..................................................................................................... 38
Standby Current Considerations............................................................................................ 41
Wake-up................................................................................................................................. 41
Programming Considerations................................................................................................. 41
Watchdog Timer.............................................................................................. 42
Watchdog Timer Clock Source............................................................................................... 42
Watchdog Timer Control Register.......................................................................................... 42
Watchdog Timer Operation.................................................................................................... 43
Reset and Initialisation................................................................................... 44
Reset Functions..................................................................................................................... 44
Reset Initial Conditions ......................................................................................................... 46
Input/Output Ports.......................................................................................... 49
Pull-high Resistors................................................................................................................. 49
Port A Wake-up...................................................................................................................... 50
I/O Port Control Registers...................................................................................................... 50
I/O Port Source Current Control............................................................................................. 51
Pin-remapping Function......................................................................................................... 52
I/O Pin Structures................................................................................................................... 52
Programming Considerations ................................................................................................ 53
Rev. 1.20
3 March 23, 2018







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