P89LPC925FN,129

Series:	LPC900
Packaging:	Tube
Part Status:	Obsolete
Core Processor:	8051
Core Size:	8-Bit
Speed:	18MHz
Connectivity:	I²C, UART/USART
Peripherals:	Brown-out Detect/Reset, LED, POR, PWM, WDT
Number of I/O:	18
Program Memory Size:	8KB (8K x 8)
Program Memory Type:	FLASH
EEPROM Size:	--
RAM Size:	256 x 8
Voltage - Supply (Vcc/Vdd):	2.4 V ~ 3.6 V
Data Converters:	A/D 4x8b; D/A 1x8b
Oscillator Type:	Internal
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	20-DIP (0.300", 7.62mm)
Supplier Device Package:	20-DIP
Base Part Number:	P89LPC925

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The P89LPC925FN,129 is a microcontroller from NXP specifically designed for embedded applications. It is built on a 8051 8-bit core processor and runs at a maximum of 12.5 MHz. The processor supports two 8-bit data and an 8-bit program bus. It includes on-chip non-volatile memory, which is divided into four pages, two of which are for read-only and program code storage, and two of which are for RAM and EEPROM. The device also includes analog-to-digital converters and a 10-bit digital-to-analog converter, along with serial ports and PWM timers.The P89LPC925FN,129 is most commonly used in applications such as automated control systems, instrumentation, automotive systems, and energy management. It is also commonly used in applications where power saving and efficiency are key design criteria.The working principle of the P89LPC925FN,129 microcontroller is based on the 8051 core processor. It is a Harvard architecture processor, meaning that it has separate data and program buses, allowing instructions to be processed while data is being transferred or retrieved from memory. The processor can operate in two modes – single-cycle and multi-cycle – depending on the complexity of the operation.In single-cycle mode, the processor can execute basic instructions such as add, subtract, move, and compare within one clock cycle. In multi-cycle mode, the processor can execute more complicated operations such as dividing and multiplication. The device also includes a built-in compiler and debugger to help with programming and debugging of applications.The embedded subsystems in the P89LPC925FN,129 provide a variety of peripherals to support applications. These include two 8-bit analog-to-digital converters, a 10-bit digital-to-analog converter, two serial ports, and three 8-bit timer/counters. The device also includes an extended RAM area of 128 bytes that can be used to store data, as well as an EEPROM to store program code.The P89LPC925FN,129 also includes advanced power management features, such as a wakeup timer and a system clock frequency selector. These power management features allow the device to be used in low-power applications, and reduce the total power consumption of the system.In summary, the P89LPC925FN,129 is a highly integrated microcontroller that is specifically designed for embedded applications. Its 8051 core processor supports both single-cycle and multi-cycle operations, and its subsystems provide a full range of peripherals. Its advanced power management features allow it to be used in low-power applications, and reduce overall system power consumption.

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