STC12C5620AD

www.STCMCU.com Mobile:(86)13922809991 Tel:86-755-82948412 Fax:86-755-82905966 . d e STC12C5620AD series MCU t i m i L STC12LE5620AD series MCU U C Data M Sheet C T S STC MCU Limited www.STCMCU.com Update date: 2011-7-15 STC MCU Limited. website：www.STCMCU.com  Free Datasheet http://www.Datasheet4U.com CONTENTS Chapter 1. Introduction. .................................................................7 1.1 1.2 1.3 1.4 1.5 1.6 Features................................................................................................... 7 Block diagram......................................................................................... 8 Pin Configurations . ................................................................................ 9 STC12C5620AD series Selection Table................................................11 STC12C5620AD series Minimum Application System. ....................... 12 STC12C5620AD series MCU Typical Application Circuit for ISP...... 13 Chapter 2. Clock, Power Management and Reset.....................30 2.1 Clock..................................................................................................... 30 2.1.1 2.1.2 2.1.3 2.1.4 On-Chip R/C Clock and External Crystal/Clcok are Optional in STC-ISP.exe .. 30 Divider for System Clock .................................................................................... 31 How to Know Internal RC Oscillator frequency(Internal clock frequency) ....... 32 Programmable Clock Output.........