Philips Semiconductors

 

 

 

 

 

 

 

 

 

User’s Manual - Preliminary -

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FLASH PROGRAM MEMORY

 

 

 

 

P89LPC901/902/903

 

 

Boot Vector

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BOOTVEC

 

7

6

5

4

 

3

2

1

0

 

 

 

Address: xxxxh

 

 

-

-

-

BOOTV4

BOOTV3

BOOTV2

BOOTV1

BOOTV0

 

 

 

Factory default value: 00h

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

SYMBOL

FUNCTION

 

 

 

 

 

 

 

 

 

 

 

 

BOOTVEC.7-5

-

Reserved (should remain unprogrammed at zero).

 

 

 

 

 

 

 

BOOTVEC.4-0

-

Boot Vector. If the Boot Vector is selected as the reset address, the P89LPC901/902/903

 

 

 

 

will start execution at an address comprised of 00H in the lower eight bits and this

 

 

 

 

BOOTVEC as the upper bits after a reset. (See section "Power-On reset code execution"

 

 

 

 

on page 73).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 14-9: Boot Vector (BOOTVEC)

 

 

 

 

 

 

 

 

Boot Status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BOOTSTAT

 

7

6

5

4

 

3

2

1

0

 

 

 

Address: xxxxh

 

 

-

-

-

-

 

-

-

 

-

BSB

 

 

 

Factory default value: 00h

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

SYMBOL

FUNCTION

 

 

 

 

 

 

 

 

 

 

 

 

BOOTSTAT.7-1

-

Reserved (should remain unprogrammed at zero).

 

 

 

 

 

 

 

BOOTSTAT.0

BSB

Boot Status Bit. If programmed to ‘1’, the P89LPC901/902/903 will always start execution

 

 

 

 

at an address comprised of 00H in the lower eight bits and BOOTVEC as the upper bits

 

 

 

 

after a reset. (See section "Power-On reset code execution" on page 73).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 14-10: Boot Status (BOOTSTAT)

 

 

 

 

 

 

2003 Dec 8

102

Page 102
Image 102
Philips P89LPC903, P89LPC902 user manual P89LPC901/902/903 Boot Vector, Boot Status, Bootvec, Bootstat

P89LPC903, P89LPC902, P89LPC901 specifications

The Philips P89LPC901, P89LPC902, and P89LPC903 are a series of 8-bit microcontrollers designed for embedded system applications. These models, which belong to the LPC900 series, are notable for their affordability and versatility, making them an attractive choice for both hobbyists and professional developers.

One of the core features of the P89LPC901, P89LPC902, and P89LPC903 microcontrollers is their powerful 8-bit architecture. Operating at clock speeds up to 20 MHz, they deliver efficient performance suited for a range of tasks. Each model includes a comprehensive instruction set that supports various data manipulation and arithmetic functions, enabling extensive programming capabilities.

These microcontrollers come with built-in memory, with configurations that vary among the three models. The P89LPC901 typically features 4 KB of Flash memory and 256 bytes of RAM, while the P89LPC902 and P89LPC903 offer enhanced memory options. This Flash memory allows for reprogrammability, making it easier to update and modify applications as needed.

Another significant characteristic of the LPC900 series is their integrated peripherals. These models are equipped with a variety of I/O ports, allowing for easy interfacing with other devices and components. The P89LPC901 supports up to 32 I/O pins, while the P89LPC902 and P89LPC903 provide additional features such as analog-to-digital converters (ADCs), timers, and serial communication interfaces. This broad range of peripherals empowers developers to design complex applications without needing extra hardware.

Power consumption is also a key consideration for microcontroller applications. The P89LPC901, P89LPC902, and P89LPC903 are designed with low power consumption in mind, making them ideal for battery-operated devices and energy-efficient projects. They can operate in various power modes, allowing for greater flexibility in deployment.

In terms of technology, these microcontrollers utilize advanced CMOS technology, ensuring high reliability and durability. Their design offers a robust solution for numerous applications, including consumer electronics, industrial controls, and automation systems.

In summary, the Philips P89LPC901, P89LPC902, and P89LPC903 microcontrollers present an attractive combination of performance, integrated peripherals, low power consumption, and versatility. Their features cater to a wide array of applications, keeping them relevant in a rapidly evolving technology landscape. For hobbyists and professionals alike, these microcontrollers represent a reliable foundation for embedded system development.