OTP MCU. BC48R2020 Datasheet

BC48R2020 MCU. Datasheet pdf. Equivalent

BC48R2020 Datasheet
Recommendation BC48R2020 Datasheet
Part BC48R2020
Description 315/433MHz Remote RF TX 8-Bit OTP MCU
Feature BC48R2020; 315/433MHz Remote RF TX 8-Bit OTP MCU BC48R2020 Revision: V1.10 Date: �M�a�y�0��4,���2�0�1�5 BC48R2.
Manufacture Holtek Semiconductor
Datasheet
Download BC48R2020 Datasheet




Holtek Semiconductor BC48R2020
315/433MHz Remote RF TX 8-Bit OTP MCU
BC48R2020
Revision: V1.10 Date: �M�a�y�0��4,���2�0�1�5



Holtek Semiconductor BC48R2020
BC48R2020
315/433MHz Remote RF TX 8-Bit OTP MCU
Table of Contents
Features................................................................................................................. 5
CPU Features...............................................................................................................................5
Peripheral Features.......................................................................................................................5
RF Transmitter Features...............................................................................................................5
General Description.............................................................................................. 6
Block Diagram....................................................................................................... 7
Pin Assignment..................................................................................................... 7
Pin Description..................................................................................................... 8
Absolute Maximum Ratings................................................................................. 9
D.C. Characteristics.............................................................................................. 9
RF Transmitter Electrical Characteristics........................................................ 10
A.C. Characteristics............................................................................................ 11
Power on Reset Characteristics........................................................................ 11
Functional Description....................................................................................... 12
Two Chip Hardware Considerations............................................................................................12
Two Chip Programming Considerations......................................................................................13
System Architecture........................................................................................... 13
Clocking and Pipelining...............................................................................................................13
Program Counter – PC................................................................................................................14
Stack...........................................................................................................................................15
Arithmetic and Logic Unit – ALU.................................................................................................15
Program Memory................................................................................................ 16
Structure......................................................................................................................................16
Special Vectors...........................................................................................................................16
Look-up Table..............................................................................................................................17
Table Program Example..............................................................................................................17
RAM Data Memory.............................................................................................. 18
Structure......................................................................................................................................18
Special Purpose Data Memory...................................................................................................19
Special Function Registers................................................................................ 20
Indirect Addressing Register – IAR0, IAR1.................................................................................20
Memory Pointers – MP0, MP1 ...................................................................................................20
Accumulator – ACC.....................................................................................................................21
Program Counter Low Register – PCL .......................................................................................21
Look-up Table Registers – TBLP, TBLH .....................................................................................21
Status Register – STATUS .........................................................................................................21
System Control Registers – CTRL0, CTRL1...............................................................................23
Rev. 1.10
2 May 04, 2015



Holtek Semiconductor BC48R2020
BC48R2020
315/433MHz Remote RF TX 8-Bit OTP MCU
Oscillator............................................................................................................. 24
Oscillator Overview ....................................................................................................................24
System Clock Configurations .....................................................................................................24
Internal RC Oscillator – HIRC ....................................................................................................24
Internal 12kHz Oscillator – LIRC ................................................................................................24
Power Down Mode and Wake-up....................................................................... 25
Power Down Mode......................................................................................................................25
Entering the Power Down Mode.................................................................................................25
Standby Current Considerations.................................................................................................25
Wake-up .....................................................................................................................................26
Watchdog Timer.................................................................................................. 27
Watchdog Timer Clock Source....................................................................................................27
Watchdog Timer Control Registers.............................................................................................27
Watchdog Timer Operation.........................................................................................................28
Reset and Initialisation....................................................................................... 29
Reset Functions..........................................................................................................................29
Reset Initial Conditions...............................................................................................................31
Input/Output Ports.............................................................................................. 33
Pull-high Resistors......................................................................................................................33
Port A Wake-up...........................................................................................................................34
I/O Port Control Registers...........................................................................................................35
Pin-shared Functions..................................................................................................................35
Programming Considerations .....................................................................................................37
Timer/Event Counter.......................................................................................... 38
Configuring the Timer/Event Counter Input Clock Source..........................................................38
Timer Register – TMR0...............................................................................................................39
Timer Control Register – TMR0C................................................................................................39
Timer Mode.................................................................................................................................40
Event Counter Mode...................................................................................................................41
Pulse Width Capture Mode.........................................................................................................42
Prescaler.....................................................................................................................................43
PFD Function..............................................................................................................................43
I/O Interfacing..............................................................................................................................43
Programming Considerations......................................................................................................44
Timer Program Example.............................................................................................................45
Interrupts............................................................................................................. 46
Interrupt Registers.......................................................................................................................46
Interrupt Operation......................................................................................................................47
Interrupt Priority...........................................................................................................................48
External Interrupt.........................................................................................................................49
Timer/Event Counter Interrupt.....................................................................................................49
Interrupt Wake-up Function.........................................................................................................49
Programming Considerations......................................................................................................50
Rev. 1.10
3 May 04, 2015







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