P89LPC933FDH datasheet(50/75 Pages) PHILIPS

50 / 75 page

9397 750 15113

Product data sheet

Rev. 06 — 20 June 2005

50 of 75

Philips Semiconductors

P89LPC933/934/935/936

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

8.28.3 Flash organization

The program memory consists of eight 2 kB sectors on the P89LPC936 device, eight 1 kB

sectors on the P89LPC934/935 devices, and four 1 kB sectors on the P89LPC933 device.

Each sector can be further divided into 64-byte pages. In addition to sector erase, page

erase, and byte erase, a 64-byte page register is included which allows from 1 to 64 bytes

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

programming time.

8.28.4 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.

8.28.5 Flash programming and erasing

Four 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 ICP mechanism. This ICP system

provides for programming through a serial clock - serial data interface. As shipped from

the factory, the upper 512 bytes of user code space contains a serial ISP routine allowing

the device to be programmed in circuit through the serial port. The ﬂash may also 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

user code space.

8.28.6 In-circuit programming

ICP is performed without removing the microcontroller from the system. The ICP facility

consists of internal hardware resources to facilitate remote programming of the

P89LPC933/934/935/936 through a two-wire serial interface. The Philips ICP facility has

made ICP 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

P89LPC933/934/935/936 User manual.

8.28.7 In-application programming

IAP is performed in the application under the control of the microcontroller’s ﬁrmware. The

IAP facility consists of internal hardware resources to facilitate programming and erasing.

The Philips IAP has made IAP in an embedded application possible without additional

components. Two methods are available to accomplish IAP. A set of predeﬁned IAP

functions are provided in a boot ROM and can be called through a common interface,

PGM_MTP. Several IAP calls are available for use by an application program to permit

selective erasing and programming of ﬂash sectors, pages, security bits, conﬁguration

bytes, and device ID. These functions are selected by setting up the microcontroller’s

registers before making a call to PGM_MTP at FF03H. The boot ROM occupies the

program memory space at the top of the address space from FF00H to FFEFH, thereby

not conﬂicting with the user program memory space.

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