Ms51xc0be qfn-20 Nuvoton (Xintang) original stock

1 GENERAL DESCRIPTION

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-System

Programming (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.

FEATURES
 Operating Characteristics
– Voltage range: 2.4 V to 5.5 V – Temperature range: -40°C to +105°C
 CPU
– 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).
 Memories
– 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.
 Clocks
– 16 MHz high-speed internal oscillator
trimmed to ±1% when VDD 5.0V, ±4% in all
conditions.
– 24 MHz high-speed internal oscillator
trimmed ±1% when VDD 5.0V, ±4% in all
conditions.
– 10 kHz low-speed internal oscillator.
– On-the-fly clock source switch via software.
 Peripherals
– Standard interrupt pins ̅̅̅̅̅̅̅ and ̅̅̅̅̅̅̅. – 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
 Power management
– Two power reduced modes: Idle and Powerdown mode.
 Power monitor
– 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 ± 4.4 kV
– Latch-up pass 150 mA
 96-bit Unique ID (UID)
 128-bit Unique Customer ID (UCID)
 2-Byte (16-bit) PDID