MS51FB9AE-T

The NuMicro MS51 series is an embedded Flash type, 8-bit high performance 1T 8051-based microcontroller. The instruction set is fully compatible with the standard 80C51 and performance enhanced. The MS51 series contains up to 32 Kbytes main Flash called APROM, in which the contents of User Code reside. The Flash supports In-Application-Programming (IAP) function, which enables on-chip firmware updates. IAP also makes it possible to configure any block of User Code array to be used as non-volatile data storage, which is written by IAP and read by IAP or MOVC instruction. There is an additional Flash called LDROM, in which the Boot Code normally resides for carrying out In-SystemProgramming (ISP). The LDROM size is configurable with a maximum of 4 Kbytes. To facilitate programming and verification, the Flash allows to be programmed and read electronically by parallel Writer or In-Circuit-Programming (ICP). Once the code is confirmed, user can lock the code for security. The MS51 series provides rich peripherals including 256 Bytes of SRAM, up to 2 Kbytes of auxiliary RAM (XRAM), Up to 30 general purpose I/O, two 16-bit Timers/Counters 0/1, one 16-bit Timer2 with three-channel input capture module, one Watchdog Timer (WDT), one Self Wake-up Timer (WKT), one 16-bit auto-reload Timer3 for general purpose or baud rate generator, two UARTs with frame error detection and automatic address recognition, one SPI, one I²C, up to 12 enhanced PWM output channels, and one 12-bit ADC. The peripherals are equipped with 18 sources with 4-level-priority interrupts capability. The MS51 series is equipped with two clock sources and supports switching on-the-fly via software. The clock sources include internal clock inputs, 10 kHz internal oscillator, and one 24 MHz internal precise oscillator that is factory trimmed to ±1% at room temperature. MS51 series provides additional power monitoring detection such as power-on reset and 4-level brown-out detection, which stabilizes the power-on/off sequence for a high reliability system design. The MS51 series microcontroller consumes very low power with two economic power modes to reduce power consumption － Idle and Power-down mode, which are software selectable. Idle mode turns off the CPU clock but allows continuing peripheral operation. Power-down mode stops the whole system clock for minimum power consumption. The system clock of the MS51 series can also be slowed down by software clock divider, which allows for a flexibility between execution performance and power consumption.

Key features

• Operating Characteristics Voltage range: 2.4 V to 5.5 V
• Temperature range: -40℃ to +105℃
• Fully static design 8-bit high performance 1T 8051-based CMOS microcontroller.
• Instruction set fully compatible with MCS-51.
• 4-priority-level interrupts capability.
• Dual Data Pointers (DPTRs).
• Up to 32 Kbytes Flash
• Configurable 4/3/2/1 Kbytes of LDROM, which provides flexibility to user developed Boot Code.
• Up to 2 Kbytes SRAM
• 256 Bytes on-chip RAM.
• Flash Memory accumulated with pages of 128 Bytes each.
• Built-in In-Application-Programmable (IAP).
• Code lock for security.
• 16 MHz high-speed internal oscillator, trimmed to ±1% when VDD = 5.0 V, ±4% in all conditions.
• 24 MHz high-speed internal oscillator, trimmed ±1% when VDD = 5.0 V, ±4% in all conditions.
• 10 kHz low-speed internal oscillator.
• On-the-fly clock source switch via software.
• Standard interrupt pins.
• Two 16-bit Timers/Counters 0 and 1 compatible with standard 8051.
• One 16-bit Timer 2 with three-channel input capture module and 9 input pin 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 timer.
• One programmable Watchdog Timer (WDT) clocked by dedicated 10 kHz internal source.
• One dedicated Self Wake-up Timer (WKT) for self-timed wake-up for power reduced modes.
• Two full-duplex UART ports with frame error detection and automatic address recognition.
• TXD and RXD pins of UART0 exchangeable via software.
• Three smart card ports support ISO7816-3 compliant T = 0, T = 1 and support full-duplex UART mode (32K Flash supported)
• One SPI port with master and slave modes, up to 12 Mbps when system clock is 24 MHz.
• One I²C bus with master and slave modes, up to 400 kbps data rate.
• Up to six pairs, twelve channels of pulse width modulator (PWM) output, with different modes and Fault Brake function for motor control.
• Eight channels of pin interrupt, shared for all I/O ports, with variable configuration of edge/level detection.
• One 12-bit ADC, supports up to 15 channels with 500 ksps converting rate
• Up to 30 general purpose I/O pins and 1 input-only pin.
• All output pins have individual 2-level slew rate control.
• Up to 20mA high current sink/source
• Programmable pull-ups pull-lows
• Two power reduced modes: Idle and Powerdown mode.
• Brown-out detection (BOD) with low power mode available, 4-level selection, interrupt or reset options.
• Power-on reset (POR).
• Strong ESD and EFT immunity
• ESD HBM pass 8 kV
• EFT ±