Product Features

• Core

• • Ultra-high speed 8051 core with single clock per machine cycle, which is called 1T and is about 12 times faster than traditional 8051

• • Fully compatible instruction set with traditional 8051

• • 16 interrupt sources and 4 interrupt priority levels

• • Online debugging is supported

• Operating voltage

• • 1.9 to 5.5V

• • Built-in LDO

• Operating temperature

• • -40°C~85°C

• Flash memory

• • Up to 17K bytes of Flash memory to be used to store user code

• • Configurable EEPROM size, 512bytes single page erased, can be repeatedly erased more than 100 thousand times.

• • In-System-Programming, ISP in short, can be used to update the application code, no need for programmer.

• • Online debugging with single chip is supported, and no emulator is needed. The number of breakpoints is unlimited theoretically.

• SRAM

• • 128 bytes internal direct access RAM

• • 128 bytes internal indirect access RAM

• • 1024 bytes internal extended RAM

• Clock

• • Internal high precise R/C clock (IRC, range from 4MHz to 36MHz), adjustable while ISP and can be divided to lower frequency by user software, 100KHz for instance

• – Error:±0.3 percent (at the temperature 25℃)

• – -1.38 percent～+1.42 percent temperature drift (at the temperature range of -40°C to +85°C)

• – -0.88 percent～+1.05 percent temperature drift (at the temperature range of -20℃ to 65℃)

• • Internal 32KHz low speed IRC with large error

• • External 4MHz~33MHz oscillator or external clock

• • The three clock source above can be selected freely by used code.

• Reset

• • Hardware reset

• – Power-on reset. Measured voltage value is 1.69V~1.82V. (Effective when the chip does not enable the low voltage reset function) The power-on reset voltage is a voltage range consisting of an upper limit voltage and a lower limit voltage. When the operating voltage drops from 5V / 3.3V to the lower limit threshold voltage of the power-on reset, the chip is in reset state. When the voltage rises from 0V to the upper threshold voltage of power-on reset, the chip is released from the reset state.

• – Reset by reset pin. The default function of P5.4 is I/O port. P5.4 pin can be set as the reset pin while ISP download. (Note: When the P5.4 pin is set as the reset pin, the reset level is low.)

• – Watch dog timer reset

• – Low voltage detection reset. 4 low voltage detection levels are provided, 2.2V (Measured as 1.90V~2.04V), 2.4V (Measured as 2.30V~2.50V), V2.7 (Measured as 2.61V~2.82V), V3.0 (Measured as 2.90V~3.13V). Each level of low-voltage detection voltage is a voltage range consisting of an upper limit voltage and a lower limit voltage. When the operating voltage drops from 5V / 3.3V to the lower limit threshold voltage of low-voltage detection, the low-voltage detection takes effect. When the voltage rises from 0V to the upper threshold voltage, the low voltage detection becomes effective.

• • Software reset

• – Writing the reset trigger register using software

• Interrupts

• • 16 interrupt sources: INT0, INT1, INT2, INT3, INT4, timer0, timer1, timer2, uart1, uart2, ADC, LVD, SPI, I2C, comparator,PCA/CCP/PWM

• • 4 interrupt priority levels

• • Interrupts that can awaken the CPU in clock stop mode: INT0 (P3.2), INT1 (P3.3), INT2 (P3.6), INT3 (P3.7), INT4 (P3.0), T0 (P3.4) ), T1(P3.5), T2(P1.2), RXD(P3.0/P3.6/P1.6), RXD2(P1.4), CCP0(P1.1/P3.5), CCP1 (P1.0/P3.6), CCP2 (P3.7), I2C_SDA (P1.4/P3.3) and comparator interrupt, low-voltage detection interrupt, power-down wake-up timer.

• Digital peripherals

• • 3 16-bit timers: timer0, timer1, timer2, where the mode 3 of timer 0 has the Non Maskable Interrupt (NMI in short) function. Mode 0 of timer 0 and timer 1 is 16-bit Auto-reload mode.

• • 2 high speed UARTs: uart1, uart2, whose baud rate clock source may be fast as FOSC/4

• • 3 groups of PCAs: CCP0, CCP1, CCP2, which can be used as capture, high speed output and 6-bits, 7-bits, 8-bits or 10-bits PWM.

• • SPI: Master mode, slave mode or master/slave automatic switch mode are supported.

• • I2C: Master mode or slave mode are supported.

• • MDU16: Hardware 16-bit Multiplier and Divider which supports 32-bit divided by 16-bit, 16-bit divided by 16-bit, 16-bit by 16-bit, data shift, and data normalization operations.

• Analog peripherals

• • 6 channels (channel 0 to channel 5) ultra-high speed ADC which supports 10-bit precision analog-to-digital conversion, the speed can be as fast as 500K(500,000 conversions per second).

• • ADC channel 15 is used to test the internal reference voltage. (The default internal reference voltage is 1.19V when the chip is shipped)

• • DAC. 3 groups of PCAs can be used as DAC.

• GPIO

• • Up to 18 GPIOs: P1.0~P1.7, P3.0~P3.7, P5.4~P5.5

• • 4 modes for all GPIOs: quasi-bidirectional mode, push-pull output mode, open drain mode, high-impedance input mode

• • Except for P3.0 and P3.1, all other I/O ports are in high-impedance state after power-on. User must set the I/O ports mode before using them. In addition, each I/O can independently enable the internal 4K pull-up resistor.

• Package

• • TSSOP20，QFN20， SOP16，SOP8， DFN8

Specifications

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