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 : 5.5V ~ 2.5V.
On-chip 16K/32K/40K/48K/56K/58K/61K/63.5K FLASH program memory with flexible ISP/IAP

capability,can be repeatedly erased more than 100 thousand times.
Large capacity of on-chip 4096 bytes SRAM: 256 byte scratch-pad RAM and 3840 bytes of

auxiliary RAM
Be capable of addressing up to 64K byte of external RAM
On-chip EEPROM with large capacity can be repeatedly erased more than 100 thousand times.
Dual Data Pointer (DPTR) to speed up data movement
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).
6 channels 15 bits high-precision PWM (with a dead-section controller) and 2 channels CCP

(The high-speed pulse function of which can be utilized to realize 11 ~ 16 bits PWM)

---- can be used as 8 channels D/A Converter or 2 Times or 2 external Interrupts

(which can be generated on rising or falling edge).
Internal hghly reliable Reset with 16 levels optional threshold voltage of reset,

so that external reset curcuit can be completely removed.
Internal high- precise R/C clock(±0.3%) with ±1% temperature drift (-40~+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).
Operating frequency range: 5- 35MHz, is equivalent to traditional 8051:60~420MHz.
Four high-speed asynchronous serial ports----UARTs (UART1/UART2/UART3/UART4 can be used
simultaneously and regarded as 9 serial ports by shifting among 9 groups of pins):

--UART1(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);

--UART2(RxD2/P1.0, TxD2/P1.1) can be switched to (RxD2_2/P4.6, TxD2_2/P4.7);

--UART3(RxD3/P0.0, TxD3/P0.1) can be switched to (RxD3_2/P5.0, TxD3_2/P5.1);

--UART4(RxD4/P0.2, TxD4/P0.3) can be switched to (RxD4_2/P5.2, TxD4_2/P5.3)
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 begenerated 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; pins RxD/RxD2/ RxD3/RxD4; pins T0/T1/T2/T3/T4(their falling edge can wake up

if T0/T1/T2/T3/T4 have been enabled before power-down mode, but no interrupts can be generatetd);

internal low-power special wake-up Timer.
7 Timers/Counters: five 16-bit reloadable Timers/Counters (T0/T1/T2/T3/T4, T0 and T1 are compatible

with Timer0/Timer1 of traditional 8051) and 2 Timers which maybe realized by 2 channels CCP.

T0/T1/T2/T3/T4 all can independently achieve external programmable clock output (5 channels) .
Programmable clock output function(output by dividing the frequency of the internal system clock

or the input clock of external pin):

The 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)

The Programmable clock output of T1 is on P3.4/T1CLKO (output by dividing the frequency of the

internal system clock or the input clock of external pin T1/P3.5)

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)

The Programmable clock output of T3 is on P0.4/T3CLKO (output by dividing the frequency of the

internal system clock or the input clock of external pin T3/P0.5)

The Programmable clock output of T4 is on P0.6/T4CLKO (output by dividing the frequency of the

internal system clock or the input clock of external pin T4/P0.7)

Five timers/counters in above all can be output by dividing the frequency from 1 to 65536.

The Programmable clock output of master clock is on P5.4/MCLKO, and its frequency can be divided

into MCLK/1, MCLK/2, MCLK/4, MCLK/16.

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.
Comparator, which can be used as 1 channel ADC or brownout detect function and support comparing

by external pin CMP+ and CMP- or internal reference voltage and generating output signal (its polarity

can be configured) on CMPO pin.
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.
62/46/42/38/30/26 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 pushpull/ strong pull-up, input-only/high-impedance and open drain.

the driving ability of each I/O port can be up to 20mA, but it don't exceed this maximum 120mA that

the current of the whole chip of 40-pin or more than 40-pin MCU, while 90mA that the current of the

whole chip of 16-pin or more than 16-pin MCU or 32-pin or less than 32-pin MCU.
Package: LQFP64L, LQFP64S, LQFP48, LQFP44, LQFP32, SOP28, SKDIP28, PDIP40.
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 >

Product Documents:

Data Sheet: STC15W4K32S4.pdf

ROSH：

Product Support:

专用烧录软件：

 ISP下载软件：STC ISP下载软件 (v6.82)