STC Micro STC15F2K32S2-28I-LQFP32

The STC15 series features ultra-strong EMI immunity and uncrackable encryption using STC's 8th-generation encryption technology. No external crystal oscillator or external reset circuit is required, and the external EEPROM can be eliminated via IAP technology. Supports ISP/IAP in-circuit programming — no programmer or emulator needed. Key features include large-capacity SRAM, dual UART, and a high-speed 10-bit ADC. High-speed, high-reliability, ultra-low power consumption, and ultra-low cost.

• Large on-chip RAM data memory: 4096 bytes
• High speed: 1 clock/machine cycle, enhanced 8051 core, 7~12× faster than standard 8051, also 20% faster than STC's early 1T series MCUs (e.g., STC12/11/10 series)
• Wide voltage range: 2.5V~5.5V
• Low-power design: slow-speed mode, idle mode, power-down mode (wake-up via external interrupt or internal power-down wake-up timer)
• No external reset required; 16 selectable reset threshold voltage levels during ISP programming; built-in high-reliability reset circuit
• No external crystal required; internal clock configurable from 5MHz~30MHz during ISP programming (equivalent to standard 8051: 60~360MHz); high-precision internal R/C oscillator (±0.3%); ±1% temperature drift (-40℃~+85℃); ±0.6% temperature drift at room temperature (-20℃~+65℃)
• Power-down wake-up sources: INT0/INT1 (rising/falling edge), INT2/INT3/INT4 (falling edge); pins CCP0/CCP1/RxD/RxD2/RxD3/RxD4/T0/T1/T2/T3/T4; dedicated internal power-down wake-up timer
• On-chip Flash program memory: 16/32/40/48/56/58K/61K/63.5K bytes, endurance >100,000 erase/write cycles
• Large on-chip EEPROM, endurance >100,000 erase/write cycles
• ISP/IAP in-system/in-application programmable; no programmer or emulator required
• High-speed ADC: 8-channel 10-bit, up to 300,000 samples/sec; 8-channel PWM also usable as 8-channel DAC
• Comparator: usable as 1-channel ADC and power-fail detection; supports comparison between external pin CMP+ and external pin CMP-, or between CMP+ and internal reference voltage; generates interrupt and output on pin CMPO (configurable polarity)
• 6-channel 15-bit dedicated high-precision PWM (with dead-band control) + 2-channel CCP (high-speed pulse output enables 2× 11~16-bit PWM) — can implement 8-channel DAC, or 2× 16-bit timers, or 2× external interrupts (rising/falling edge)
• 7 timers/counters total: 5× 16-bit auto-reload timers/counters (T0/T1/T2/T3/T4; T0 and T1 compatible with standard 8051); all support clock output; pin SysClkO provides divided system clock output (÷1, ÷2, ÷4, or ÷16); 2-channel CCP implements 2 additional timers
• Programmable clock output (divided output from internal system clock or external clock input): T0 outputs on P3.5; T1 outputs on P3.4; T2 outputs on P3.0; T3 outputs on P0.4; T4 outputs on P0.6; all 5 timers/counters support 1~65536 division ratios; system clock output on P5.4/SysClkO (STC15 series 8-pin MCUs output main clock on P3.4/MCLKO)
• Ultra-high-speed quad UART: 4 fully independent high-speed asynchronous serial ports; time-division multiplexing enables up to 9 virtual serial ports
• SPI high-speed synchronous serial interface
• Hardware watchdog timer (WDT)
• Advanced instruction set architecture, compatible with standard 8051 instruction set; hardware multiply/divide instructions
• General-purpose I/O: 62/46/42/38/30/26 pins; default after reset: quasi-bidirectional/weak pull-up (standard 8051 I/O); 4 configurable modes: quasi-bidirectional/weak pull-up, push-pull/strong pull-up, input-only/high-impedance, open-drain; each I/O pin sink/source up to 20mA; total chip current not to exceed 120mA
• No external crystal or external reset required; capable of outputting clock signal and active-low reset signal
• Unbreakable encryption using Macro Crystal 9th-generation encryption technology
• Superior noise immunity: high ESD protection, passes 20kV ESD test; passes 4kV EFT test; wide voltage tolerance against power supply fluctuation; wide operating temperature range: -40℃~+85℃
• Significantly reduced EMI: configurable internal clock, 1 clock/machine cycle, supports low-frequency clock operation
• Ultra-low power consumption: power-down mode <0.4μA (external interrupt wake-up); idle mode typical <1mA; normal operating mode 4mA~6mA; power-down mode wake-up via external interrupt or dedicated internal timer; suitable for battery-powered systems
• In-system emulation and programming; no dedicated programmer or emulator required; supports remote firmware upgrade
• High speed: 1 clock/machine cycle, enhanced 8051 core, 6~12× faster than standard 8051, also 20% faster than STC's early 1T series MCUs (e.g., STC12/11/10 series)
• Wide voltage range: 2.4V~5.5V
• Low-power design: slow-speed mode, idle mode, power-down mode (wake-up via external interrupt or internal power-down wake-up timer)
• No external reset required; 16 selectable reset threshold voltage levels during ISP programming; built-in high-reliability reset circuit
• No external crystal required; internal clock configurable from 5MHz~35MHz during ISP programming (equivalent to 8051: 60~420MHz); high-precision internal R/C oscillator (±0.3%); ±1% temperature drift (-40℃~+85℃); ±0.6% temperature drift at room temperature (-20℃~+65℃)
• Power-down wake-up sources: INT0/INT1 (rising/falling edge), INT2/INT3/INT4 (falling edge); pins T0/T2; dedicated internal power-down wake-up timer
• On-chip Flash program memory: 1K/2K/3K/4K/5K/7K bytes, endurance >100,000 erase/write cycles
• On-chip RAM data memory: 128 bytes
• On-chip EEPROM, endurance >100,000 erase/write cycles
• ISP/IAP in-system/in-application programmable; no programmer or emulator required
• 2× 16-bit auto-reload timers T0/T2 with clock output capability; pin MCLKO provides divided internal main clock output (÷1, ÷2, or ÷4)
• Programmable clock output (divided output from internal system clock or external clock input): T0 outputs on P3.5; T2 outputs on P3.0; internal main clock output on P3.4/MCLKO (STC15 series MCUs with more than 8 pins output main clock on P5.4/MCLKO)
• Hardware watchdog timer (WDT)
• UART function implementable via [P3.0/INT4, P3.1] combined with timer
• Advanced instruction set architecture, compatible with standard 8051 instruction set; hardware multiply/divide instructions
• General-purpose I/O: 8 pins; default after reset: quasi-bidirectional/weak pull-up