P89LPC915FDH datasheet(55/72 Pages) PHILIPS

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Philips Semiconductors

P89LPC915/916/917

8-bit microcontrollers with accelerated two-clock 80C51 core

Product data

Rev. 04 — 17 December 2004

55 of 72

9397 750 14397

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

P89LPC915/916/917 User’s Manual.

9.28.6

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

P89LPC915/916/917 User’s Manual.

9.28.7

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.

9.28.8

User conﬁguration bytes

Some user-conﬁgurable features of the P89LPC915/916/917 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

P89LPC915/916/917 User’s Manual for additional details.

9.28.9

User sector security bytes

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

Please see the

P89LPC915/916/917 User’s Manual for additional details.

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