P89LPC901FD datasheet(41/55 Pages) PHILIPS

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Philips Semiconductors

P89LPC901/902/903

8-bit microcontrollers with two-clock 80C51 core

Product data

Rev. 04 — 21 November 2003

41 of 55

9397 750 12293

designed to optimize the erase and programming mechanisms. The

P89LPC901/902/903 uses VDD as the supply voltage to perform the Program/Erase

algorithms.

8.26.2

Features

• Programming and erase over the full operating voltage range.

• Byte-erase allowing code memory to be used for data storage.

• Read/Programming/Erase using ICP.

• Any ﬂash program/erase operation in 2 ms.

• Programming with industry-standard commercial programmers.

• Programmable security for the code in the Flash for each sector.

• More than 100,000 minimum erase/program cycles for each byte.

• 10-year minimum data retention.

8.26.3

Flash organization

The P89LPC901/902/903 program memory consists of four 256 byte sectors. Each

sector can be further divided into 16-byte pages. In addition to sector erase, page

erase, and byte erase, a 16-byte page register is included which allows from 1 to 16

bytes of a given page to be programmed at the same time, substantially reducing

overall programming time. In addition, erasing and reprogramming of

user-programmable conﬁguration bytes including UCFG1, the Boot Status Bit, and

the Boot Vector is supported.

8.26.4

Flash programming and erasing

Different methods of erasing or programming of the Flash are available. The Flash

may be programmed or erased in the end-user application (IAP) under control of the

application’s ﬁrmware. Another option is to use the In-Circuit Programming (ICP)

mechanism. This ICP system provides for programming through a serial clock- serial

data interface. Third, the Flash may be programmed or erased 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.

8.26.5

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 P89LPC901/902/903 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 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

P89LPC901/902/903 User’s

Manual.

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