P89LPC907FD datasheet(41/51 Pages) PHILIPS

41 / 51 page

Philips Semiconductors

P89LPC906/907/908

8-bit microcontrollers with two-clock 80C51 core

Product data

Rev. 05 — 17 December 2004

41 of 51

9397 750 14467

data interface using a commercially available EPROM programmer which supports

this device. This device does not provide for direct veriﬁcation of code memory

contents. Instead this device provides a 32-bit CRC result on either a sector or the

entire 1 KB of user code space.

8.25.5

In-circuit programming (ICP)

In-Circuit Programming is performed without removing the microcontroller from the

system. The In-Circuit Programming facility consists of internal hardware resources

to facilitate remote programming of the P89LPC906/907/908 through a two-wire

serial interface. The Philips In-Circuit Programming facility has made in-circuit

programming in an embedded application, using commercially available

programmers, possible with a minimum of additional expense in components and

circuit board area. The ICP function uses ﬁve pins. Only a small connector (with VDD,

VSS, RST, clock, and data signals) needs to be available to interface your application

to a commercial programmer in order to use this feature. Additional details may be

found in the

P89LPC906/907/908 User’s Manual.

8.25.6

In-application programming (IAP-Lite)

In-Application Programming is performed in the application under the control of the

microcontroller’s ﬁrmware. The IAP-Lite facility consists of internal hardware

resources to facilitate programming and erasing. The Philips In-Application

Programming Lite has made in-application programming in an embedded application

possible without additional components. This is accomplished through the use of four

SFRs consisting of a control/status register, a data register, and two address

registers. Additional details may be found in the

P89LPC906/907/908 User’s Manual.

8.25.7

Using ﬂash as data storage

The Flash code memory array of this device supports individual byte erasing and

programming. Any byte in the code memory array may be read using the MOVC

instruction, provided that the sector containing the byte has not been secured (a

MOVC instruction is not allowed to read code memory contents of a secured sector).

Thus any byte in a non-secured sector may be used for non-volatile data storage.

8.25.8

User conﬁguration bytes

Some user-conﬁgurable features of the P89LPC906/907/908 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

P89LPC906/907/908 User’s Manual for additional details.

8.25.9

User sector security bytes

There are four User Sector Security Bytes, each corresponding to one sector. Please

see the

P89LPC906/907/908 User’s Manual for additional details.

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