STC15F408AD series

Features:

• Enhanced 8051 Central Processing Unit, 1T, single clock per machine cycle, faster 8~12 times than the rate of a traditional 8051.
• Operating voltage range:
  • STC15F408AD series: 5.5V ~ 4.2V (5V MCU).
  • STC15L408AD series: 3.6V ~ 2.4V (3V MCU).
• On-chip 8K / 13K FLASH program memory with flexible ISP/IAP capability can be repeatedly erased more than 100 thousand times.
• on-chip 512 bytes SRAM: 256 byte scratch-pad RAM and 256 bytes of auxiliary RAM
• On-chip EEPROM with large capacity can be repeatedly erased more than 100 thousand times.
• ISP/IAP, In-System-Programming and In-Application-Programming , no need for programmer and emulator.
• 8 channels and 10 bits Analog-to-Digital Converter (ADC), the speed up to 300 thousand times per second, 3 channels PWM also can be used as 3 channels D/A Converter(DAC).
• 3 channels Capture/Compare uints (CCP /PCA /PWM)
  ---- can be used as 3 Times or 3 external Interrupts (can be generated on rising or falling edge) or 3 channels D/A Converter
• The high-speed pulse function of CCP/PCA can be utilized to to realize 3 channels 9 ~ 16 bits PWM (each channel of which takes less than 0.6% system time)
• The clock output function of T0, T1 or T2 can be utilized to realize 8 ~ 16 bit PWM with a high degree of accuracy (which takes less than 0.4% system time)
• Internal hghly reliable Reset with 8 levels optional threshold voltage of reset, external reset curcuit can be completely removed
• Internal high- precise R/C clock(±0.3%) with ±1% temperature drift (-40°C to +85°C)) while ±0.6%(-20~+65°C) in normal temperature and wide frenquency adjustable between 5MHz and 35MHz (5.5296MHz /11.0592MHz / 22.1184MHz / 33.1776MHz).
• No need external crystal and reset, and can output clock and low reset signal from MCU.
• Operating frequency range: 5 ~ 28MHz, is equivalent to traditional 8051 : 60 ~ 336MHz.
• A high-speed asynchronous serial port----UART ( can be regarded as 3 serial ports by shifting among 3 groups of pins):
  --UART(RxD/P3.0, TxD/P3.1) can be switched to (RxD_2/P3.6, TxD_2/P3.7), also can be switched to (RxD_3/P1.6, TxD_3/P1.7).
• A high-speed synchronous serial peripheral interface----SPI.
• Support the function of Encryption Download (to protect your code from being intercepted).
• Support the function of RS485 Control
• Code protection for flash memory access, excellent noise immunity, very low power consumption
• Power management mode: Slow-Down mode, Idle mode(all interrupt can wake up Idle mode),Stop/Power- Down mode.
• Timers which can wake up stop/power-down mode: have internal low-power special wake-up Timer.
• Resource which can wake up stop/power-down mode are:
  INT0/P3.2, INT1/P3.3 (INT0/INT1, may be generated on both rising and falling edges), INT2 /P3.6, INT3/P3.7, INT4/P3.0 (INT2 /INT3 /INT4 , only be generated on falling edge); pins CCP0/CCP1/CCP2; pins T0/T2 (their falling edge can wake up if T0/T2 have been enabled before power-down mode, but no interrupts can be generatetd); internal lowpower special wake-up Timer.
• Five Timers/Counters, two 16-bit reloadable Timer/Counter(T0/T2, T0 is compatible with Timer0 of traditional 8051), T0/T2 all can independently achieve external programmable clock output, 3 channels CCP/PWM/PCA also can be used as three timers.
• Programmable clock output function(output by dividing the frequency of the internal system clock or the input clock of external pin):
  The speed of external programmable clock output of 5V MCU is also not more than 13.5MHz, because the output speed of I/O port of STC15 series 5V MCU is not more than 13.5MHz.
  The speed of external programmable clock output of 3.3V MCU is also not more than 8MHz, because the output speed of I/O port of STC15 series 3.3V MCU is not more than 8MHz.
  ①The Programmable clock output of T0 is on P3.5/T0CLKO (output by dividing the frequency of the internal system clock or the input clock of external pin T0/P3.4)
  ② The Programmable clock output of T2 is on P3.0/T2CLKO (output by dividing the frequency of the internal system clock or the input clock of external pin T2/P3.1)
  Two timers/counters in above all can be output by dividing the frequency from 1 to 65536.
  ③ The Programmable clock output of master clock is on P5.4/MCLKO, and its frequency can be divided into MCLK, MCLK/2, MCLK/4.
  The master clock can either be internal R/C clock or the external input clock or the external crystal oscillator.
  MCLK is the frequency of master clock. MCLKO is the output of master clock.
  It is on MCLKO/P3.4 that the Programmable clock output of master clock of STC15 series 8-pin MCU (such as STC15F104W series). However, it is on MCLKO/P5.4 that the Programmable clock output of master clock of other STC15 series MCU including 16-pin or more than 16-pin MCU(such as STC15F2K60S2, STC15F4K60S4 and so on)
• One 15 bitsWatch-Dog-Timer with 8-bit pre-scaler (one-time-enabled)
• advanced instruction set, which is fully compatible with traditional 8051 MCU, have hardware multiplication / division command.
• 30/26 common I/O ports are available, their mode is quasi_bidirectional/weak pull-up (traditional 8051 I/O ports mode) after reset, and can be set to four modes: quasi_bidirectional/weak pull-up, strong push-pull/ strong pull-up, input-only/high-impedance and open drain.
  The driving ability of each I/O port can be up to 20mA, but the current of the whole chip dont exceed this maximum 90mA.
  If I/O ports is not enough, it can be extended by connecting a 74HC595(reference price: RMB 0.15 yuan). Besides, cascading several chips also can extend to dozens of I/O ports.
• LQFP32 (9mm x 9mm), SOP28, SKDIP28 (For 28-pin MCU of STC15F/L408AD series, Recommend STC15W401AS series to replace them).
• All products are baked 8 hours in high-temperature 175°C after be packaged ,Manufacture guarantee good quality.
• In Keil C development environment, select the Intel 8052 to compiling and only contain < reg51.h >