HT45F4M
Lithium Battery Backup Power ASSP 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
A.C. Characteristics.........................................................................................11
ADC Electrical Characteristics...................................................................... 12
Over Voltage/Current circuit Electrical Characteristics.............................. 13
Power on Reset Electrical Characteristics................................................... 13
System Architecture....................................................................................... 14
Clocking and Pipelining.......................................................................................................... 14
Program Counter.................................................................................................................... 15
Stack...................................................................................................................................... 16
Arithmetic and Logic Unit – ALU............................................................................................ 16
Flash Program Memory.................................................................................. 17
Structure................................................................................................................................. 17
Special Vectors...................................................................................................................... 17
Look-up Table......................................................................................................................... 18
Table Program Example......................................................................................................... 19
In Circuit Programming.......................................................................................................... 20
On-Chip Debug Support – OCDS.......................................................................................... 21
RAM Data Memory.......................................................................................... 21
Structure................................................................................................................................. 21
Special Function Register Description......................................................... 23
Indirect Addressing Registers – IAR0, IAR1.......................................................................... 23
Memory Pointers – MP0, MP1............................................................................................... 23
Bank Pointer – BP.................................................................................................................. 24
Accumulator – ACC................................................................................................................ 24
Program Counter Low Register – PCL................................................................................... 24
Look-up Table Registers – TBLP, TBHP, TBLH...................................................................... 24
Status Register – STATUS..................................................................................................... 25
EEPROM Data Memory................................................................................... 27
EEPROM Data Memory Structure......................................................................................... 27
EEPROM Registers............................................................................................................... 27
Reading Data from the EEPROM ......................................................................................... 29
Rev. 1.10
2
January 15, 2013