P89LPC9381FDH datasheet(38/60 Pages) PHILIPS

38 / 60 page

P89LPC9381_1

Product data sheet

Rev. 01 — 8 September 2006

38 of 60

Philips Semiconductors

P89LPC9381

8-bit microcontroller with 10-bit ADC

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

factory, the upper 512 B of user code space contains a serial ISP routine allowing for 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.

7.26.6 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 P89LPC9381 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

P89LPC9381

User’s Manual.

7.26.7 IAP

In-Application Programming 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 In-Application Programming has made

in-application programming 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 FF00 to FEFF hex, thereby

not conﬂicting with the user program memory space.

In addition, IAP operations can be 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 P89LPC9381

User’s Manual.

7.26.8 ISP

In-System Programming is performed without 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

P89LPC9381 through the serial port. This ﬁrmware is provided by Philips and embedded

within each P89LPC9381 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 (VDD,VSS,

TXD, RXD, and RST). Only a small connector needs to be available to interface your

application to an external circuit in order to use this feature.

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