Document
A/D Flash USB MCU with SPI
HT66FB540/HT66FB542 HT66FB550/HT66FB560
Revision: V1.80 Date: November 19, 2019
HT66FB540/HT66FB542/HT66FB550/HT66FB560 A/D Flash USB MCU with SPI
Table of Contents
Features............................................................................................................. 6
CPU Features.......................................................................................................................... 6 Peripheral Features.................................................................................................................. 6
General Description.......................................................................................... 7 Selection Table.................................................................................................. 8 Block Diagram................................................................................................... 8 Pin Assignment................................................................................................. 9 Pin Description............................................................................................... 12 Absolute Maximum Ratings........................................................................... 23 D.C. Characteristics........................................................................................ 24 A.C. Characteristics........................................................................................ 26 LVD & LVR Electrical Characteristics........................................................... 27 ADC Electrical Characteristics...................................................................... 28 Comparator Electrical Characteristics......................................................... 28 Power on Reset (AC+DC) Electrical Characteristics................................... 28 System Architecture....................................................................................... 29
Clocking and Pipelining.......................................................................................................... 29 Program Counter.................................................................................................................... 30 Stack...................................................................................................................................... 31 Arithmetic and Logic Unit – ALU............................................................................................ 31
Flash Program Memory.................................................................................. 32
Structure................................................................................................................................. 32 Special Vectors...................................................................................................................... 32 Look-up Table.................................................................................