P89LPC938FDH datasheet(49/68 Pages) PHILIPS

Part #	P89LPC938FDH

Description	8-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable Flash with 10-bit A/D converter

PDF	68 Pages

Scroll/Zoom	100%

Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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49 / 68 page

9397 750 14051

Product data sheet

Rev. 01 — 25 February 2005

49 of 68

Philips Semiconductors

P89LPC938

8-bit microcontroller with 10-bit A/D converter

criteria, the boundary limits will again be compared after all 8 MSBs have been converted.

A boundary status register (BNDSTA0) ﬂags the channels which caused a boundary

interrupt.

8.7 Clock divider

The A/D converter requires that its internal clock source be in the range of 500 kHz to

3 MHz to maintain accuracy. A programmable clock divider that divides the clock

from 1 to 8 is provided for this purpose.

8.8 Power-down and Idle mode

In Idle mode the A/D converter, if enabled, will continue to function and can cause the

device to exit Idle mode when the conversion is completed if the A/D interrupt is enabled.

In Power-down mode or Total Power-down mode, the A/D does not function. If the A/D is

enabled, it will consume power. Power can be reduced by disabling the A/D.

P89LPC938FDH Datasheet(PDF) 49 Page - NXP Semiconductors