Flash MCU. BC68F2123 Datasheet

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BC68F2123 Datasheet
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Part BC68F2123
Description Sub-1GHz OOK/FSK TX Soc 1K Flash MCU
Feature BC68F2123; Sub-1GHz OOK/FSK TX Soc 1K Flash MCU BC68F2123 Revision: V1.20 Date: �M�a�r�c�h�0��6,��2�0�1��8 BC6.
Manufacture Holtek Semiconductor
Datasheet
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Holtek Semiconductor BC68F2123
Sub-1GHz OOK/FSK TX Soc 1K Flash MCU
BC68F2123
Revision: V1.20 Date: �M�a�r�c�h�0��6,��2�0�1��8



Holtek Semiconductor BC68F2123
BC68F2123
Sub-1GHz OOK/FSK TX Soc 1K Flash MCU
Table of Contents
Features............................................................................................................. 5
CPU Features.......................................................................................................................... 5
Peripheral Features.................................................................................................................. 5
General Description.......................................................................................... 6
Block Diagram................................................................................................... 6
Pin Assignment................................................................................................. 7
Pin Description................................................................................................. 8
Absolute Maximum Ratings............................................................................. 9
D.C. Characteristics.......................................................................................... 9
MCU D.C. Characteristics........................................................................................................ 9
RF D.C. Characteristics......................................................................................................... 10
A.C. Characteristics.........................................................................................11
MCU A.C. Characteristics.......................................................................................................11
RF A.C. Characteristics...........................................................................................................11
LVD/LVR Electrical Characteristics............................................................... 12
Power-on Reset Characteristics.................................................................... 13
System Architecture....................................................................................... 14
Clocking and Pipelining.......................................................................................................... 14
Program Counter.................................................................................................................... 15
Stack...................................................................................................................................... 15
Arithmetic and Logic Unit – ALU............................................................................................ 16
Flash Program Memory.................................................................................. 17
Structure................................................................................................................................. 17
Special Vectors...................................................................................................................... 17
Look-up Table......................................................................................................................... 17
Table Program Example......................................................................................................... 18
In Circuit Programming – ICP................................................................................................ 19
On-Chip Debug Support – OCDS.......................................................................................... 20
Data Memory................................................................................................... 21
Structure................................................................................................................................. 21
General Purpose Data Memory............................................................................................. 21
Special Purpose Data Memory.............................................................................................. 22
Special Function Register Description......................................................... 23
Indirect Addressing Registers – IAR0, IAR1.......................................................................... 23
Bank Pointer – BP.................................................................................................................. 24
Accumulator – ACC................................................................................................................ 24
Program Counter Low Register – PCL................................................................................... 24
Look-up Table Registers – TBLP, TBLH................................................................................. 24
Status Register – STATUS..................................................................................................... 25
Rev. 1.20
2 March 06, 2018



Holtek Semiconductor BC68F2123
BC68F2123
Sub-1GHz OOK/FSK TX Soc 1K Flash MCU
EEPROM Data Memory................................................................................... 27
EEPROM Data Memory Structure......................................................................................... 27
EEPROM Registers............................................................................................................... 27
Reading Data from the EEPROM.......................................................................................... 29
Writing Data to the EEPROM................................................................................................. 29
Write Protection...................................................................................................................... 29
EEPROM Interrupt................................................................................................................. 29
Programming Considerations................................................................................................. 30
Oscillators...................................................................................................... 31
Oscillator Overview................................................................................................................ 31
System Clock Configurations................................................................................................. 31
Internal RC Oscillator – HIRC................................................................................................ 32
Internal 32kHz Oscillator – LIRC............................................................................................ 32
Supplementary Oscillator....................................................................................................... 32
Operating Modes and System Clocks.......................................................... 32
System Clocks....................................................................................................................... 32
System Operation Modes....................................................................................................... 33
Control Register..................................................................................................................... 35
Operating Mode Switching .................................................................................................... 36
Standby Current Considerations............................................................................................ 40
Wake-up................................................................................................................................. 40
Watchdog Timer.............................................................................................. 41
Watchdog Timer Clock Source............................................................................................... 41
Watchdog Timer Control Register.......................................................................................... 41
Watchdog Timer Operation.................................................................................................... 42
Reset and Initialisation................................................................................... 43
Reset Functions..................................................................................................................... 43
Reset Initial Conditions.......................................................................................................... 46
Input/Output Ports.......................................................................................... 48
Pull-high Resistors................................................................................................................. 48
Port A Wake-up...................................................................................................................... 49
I/O Port Input/Output Control ................................................................................................ 50
Pin-shared Functions............................................................................................................. 51
I/O Pin Structures................................................................................................................... 53
Programming Considerations................................................................................................. 53
Timer Modules – TM....................................................................................... 54
Introduction............................................................................................................................ 54
TM Operation......................................................................................................................... 54
TM Clock Sources.................................................................................................................. 54
TM Interrupts.......................................................................................................................... 55
TM External Pins.................................................................................................................... 55
TM Input/Output Pin Control ................................................................................................. 55
Programming Considerations................................................................................................. 56
Rev. 1.20
3 March 06, 2018







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