P89LPC925 PHILIPS [NXP Semiconductors], P89LPC925 Datasheet - Page 38

• Manufacturer Part Number: P89LPC925
• Description: 8-bit microcontrollers with accelerated two-clock 80C51 core 4 kB/8 kB 3 V low-power Flash with 8-bit A/D converter
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
9397 750 14471
Product data
8.26 User configuration bytes
8.27 User sector security bytes
In-System Programming (ISP):
removing the microcontroller from the system. The In-System Programming facility
consists of a series of internal hardware resources coupled with internal firmware to
facilitate remote programming of the P89LPC924/925 through the serial port. This
firmware is provided by Philips and embedded within each P89LPC924/925 device.
The Philips In-System Programming facility has made in-system programming in an
embedded application possible with a minimum of additional expense in components
and circuit board area. The ISP function uses five pins (V
RST). Only a small connector needs to be available to interface your application to an
external circuit in order to use this feature. Please see the P89LPC924/925 User’s
Manual for additional details.
In-Application Programming (IAP):
are available for use by an application program to permit selective erasing and
programming of Flash sectors, pages, security bits, configuration bytes, and device
identification. All calls are made through a common interface, PGM_MTP. The
programming functions are selected by setting up the microcontroller’s registers
before making a call to PGM_MTP at FF03H. Please see the P89LPC924/925 User’s
Manual for additional details.
In-Circuit Programming (ICP):
allow commercial programmers to program and erase these devices without
removing the microcontroller from the system. The In-Circuit Programming facility
consists of a series of internal hardware resources to facilitate remote programming
of the P89LPC924/925 through a two-wire serial interface. Philips has made in-circuit
programming in an embedded application possible with a minimum of additional
expense in components and circuit board area. The ICP function uses five pins (V
V
your application to an external programmer in order to use this feature.
A number of user-configurable features of the P89LPC924/925 must be defined at
power-up and therefore cannot be set by the program after start of execution. These
features are configured through the use of the Flash byte UCFG1. Please see the
P89LPC924/925 User’s Manual for additional details.
There are four or eight User Sector Security Bytes, depending on the device, each
corresponding to one sector. Please see the P89LPC924/925 User’s Manual for
additional details.
SS
, P0.5, P0.4, and RST). Only a small connector needs to be available to interface
Rev. 03 — 15 December 2004
8-bit microcontrollers with accelerated two-clock 80C51 core
In-Circuit Programming is a method intended to
In-System Programming is performed without
Several In-Application Programming (IAP) calls
P89LPC924/925
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
DD
, V
SS
, TXD, RXD, and
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,