SC51F3832/16 is an 8-bit MCU integrated with LCD driver and charge pump. It bases on SC51 core with built-in 32K/16K-byte MTP and 2K-byte RAM and 1K or 256-byte E2, integrates 16MHz high precision RCH and 32.768KHz high precision RCL, rail-to-rail analog comparator,10-bit ADC with maximum 13-ch external channels, flexible clock system, rich timer resource and communication interface, which designed for various control applications. It features 1.8V~3.6V operating voltage range, low display current in IDLE mode and ultra-low stop current, which makes it well suitable for the battery-powered systems.

Features：

8-bit SC51 CPU

• Compatible with MCS51 instruction set, dual DPTR; support software reset instruction.
  

• Improved instruction structure, the execution time of 90% instructions is two to four clock cycles.

On-chip Memory

• 32K/16K*8 MTP

• Data retention time＞10 years @85°C.

• Erase times＞100.

• 2K-byte RAM.

• 1K or 256-byte E2

• Data retention time＞10 years @85°C.

• Erase times＞1,000,000.

• Support In-System-Program (ISP), only 5 pins are needed (including VDD/VSS).

Power supply and Reset

• Operation voltage: VDD=1.8V~3.6V.

• Built-In Power-On-Reset（POR）.

• Built-In Low-Voltage-Reset（LVR）with 4 levels selectable：1.8V, 1.9V, 2.2V, 2.5V.

• Built-In Low-Voltage-Detect（LVD）with 16 levels selectable：1.8V，1.9V，2.0V，2.1V，2.2V，2.3V，2.4V，2.5V，2.6V，2.7V， 2.8V，2.9V，3.0V，3.1V，3.2V，3.3V

• Built-in watchdog（WDT）.

System clock

• Built-in 32KHz low precision RCL
  

• Built-in 32KHz high precision HARCL with ±1%@V_DD=1.8~3.6V, TA=-10～50°C

• Built-in 16MHz high precision RCH with ±1%@V_DD=1.8~3.6V, T_A=-10～50°C. After Clock divide-by-two，it can be used as a system clock source or directly as a PWM module counting clock source.

• Support external 1~8MHz high frequency crystal oscillator or external 32.768KHz low frequency crystal oscillator, multiplexed with one group of pin, configured by information area.

• Support stop-vibration detection for external 32.768KHz oscillator

• Pre-scale factors of system clock: 8/4/2/1

Input/Output

• Support up to 55 I/O ports
  

• Built-in high current transistor: 200mA/250mA @ V_DD=3.0V, V_OL=0.3V

• P0/P1/P2/P3/P4/P9/P10 ports support keyboard interrupt wake-up function, interrupt polarity selectable.

• 4-ch external interrupt, interrupt polarity selectable.

Timer

• 4-ch 16-bit Timers（T0,T1,T4,T5），compatible with traditional MCS51.
  

• T0 supports square wave output, T1 supports PWM output.

• 1-ch 16-bit T2 with capture function

• 1-ch 8-bit carrier modulation and demodulation (CRT)

• 1-ch 8-level FIFO envelope generator T168, combining with CRT timer can generate arbitrary infrared waveform, which can greatly reduce CPU power.

• 1-ch 12-bit PWM generator with arbitrary settable period and duty cycle

• 1-ch 16-bit WT timer which can generate buzzer output with 4 kinds of frequency: 8K/4K/2K/1KHz.

Communication port

• 1-ch UART. 

• 1-ch SPI.

Analog peripheral

• 1-ch 10-bit ADC

• Up to 13 external channels
  

• Built-in Temperature sensor

• 1-ch rail-to-rail analog comparator(ACMP)

• Built-in 16-level resistor divider reference voltage.

• The built-in reference voltage can be selected as resistor divider voltage source.

• Built-in LCD driver

• Support up to 8 COM: 8X33, 6X35, 5X36, 4X37

• 1/2, 1/3, 1/4 bias selectable

• Support single point flickering and full points flickering.

• Support resistance division mode, and resistive LCD contrast is adjustable by 8-level, drive capacities is selectable by 3-level, with fast charging mode.

• Support capacitor split mode.

• Support internal charge pump mode, with built-in reference voltage is 16-level selectable: 0.95V~1.3V, 50mV by step. The max LCD drive voltage can be 3 or 4-times of reference voltage.

Operation Modes

• Normal mode.

• IDLE mode

• External oscillator 32.768KHz and WT enabled, LCD set as resistance division mode: 11µA @3.0V.
  

• External oscillator 32.768KHz and WT enabled, LCD set as capacitor split mode: 8µA @3.0V.

• External oscillator 32.768KHz and WT enabled, LCD set as internal charge pump mode: 11µA @3.0V.

• STOP mode

• Low voltage enabled, 3uA @3.0V
  

• RCL and WT enabled, timing wake-up by 0.5second, 0.7µA @3.0V.

• All module disabled, 0.6µA @3.0V

Package

• LQFP-64/48