NuMicro® MS51FB9AE is embedded based on a 1T 8051-based CMOS microcontroller, runs up to 24 MHz, features 16 K bytes flash, 1 K bytes SRAM, and 4 K bytes loader ROM for the ISP, also equipped with rich peripherals: 2 sets of UART; 1 set of I²C, and 1 set of SPI, 18 GPIO, 8 channels of 12-bit ADC, Watchdog Timer, Window Watchdog Timer, and 6*16-bit PWM channel, the package is available in TSSOP20.

Key Features:

• Operating Characteristics
• Temperature range: – 40 ℃ to 105 ℃
• EFT 4 kV

Core –

• 1T 8051-based CMOS microcontroller running up to 24 MHz

Memories –

• 16 K bytes of Flash
• Configurable 4 K / 3 K / 2 K / 1 K Bytes of LDROM, which provides flexibility to user-developed Boot Code
• 1 K bytes SRAM
• 256 Bytes on-chip RAM
• Flash Memory accumulated with pages of 128 Bytes each
• Built-in In-Application-Programmable ( IAP )

Clocks

• The external clock input ( 32 K body only )
• 16 MHz high-speed internal oscillator trimmed to ± 1 % when VDD 5.0 V, ± 2 % in all conditions.
• 24 MHz high-speed internal oscillator trimmed to ± 1 % when V_DD 5.0 V, ± 2 % in all conditions
• 10 kHz low-speed internal oscillator -On-the-fly clock source switch via software

Power management

• Brown-out Detection ( BOD ) with low power mode available
• 4-level selection, interrupt or reset options -Power-on reset ( POR )

Peripherals

• Two 16-bit Timers / Counters 0 and 1 compatible with standard 8051
• One 16-bit Timer 2 with a three-channel input capture module and 9 input pins can be selected
• One 16-bit auto-reload Timer 3, which can be the baud rate clock source of UARTs
• One 16-bit PWM counter interrupt for the timer -6*16-bit pulse width modulator ( PWM ) output, with different modes and Fault Brake function for motor control
• One programmable Watchdog Timer ( WDT ) -One dedicated Self Wake-up Timer ( WKT )
• 2 full-duplex UART ports with frame error detection and automatic address recognition
• 1 SPI port with master and slave modes, up to 12 Mbps when the system clock is 24 MHz -1 I²C bus with master and slave modes, up to 400 kbps data rate
• 8 channels of 12-bit ADC, up to 500 ksps converting rate
• 18 general-purpose I / O pins and 1 input-only pin -Programmable pull-up pull-lows

Development Tools

• Nuvoton Nu-Link with KEILTM and IAR development environment
• Nuvoton Nu-Link In-Circuit-Programmer
• Nuvoton In-System-Programming ( ISP )

1. 96-bit Unique ID ( UID )
2. 128-bit Unique Customer ID ( UCID )
3. 2-Byte ( 16-bit ) PDID