P89LPC9211FDH datasheet(47/74 Pages) NXP

47 / 74 page

P89LPC92X1_1

Preliminary data sheet

Rev. 01 — 16 April 2009

47 of 74

NXP Semiconductors

P89LPC9201/9211/922A1/9241/9251

8-bit microcontroller with 8-bit ADC

temperature. The temperature sensor is measured through Anin03. Anin00, Anin01 and

Anin02 are unused. A block diagram of the ADC is shown in Figure 15 “ADC block

diagram”.

The ADC consists of an 4-input multiplexer which feeds a sample-and-hold circuit

providing an input signal to comparator inputs. The control logic in combination with the

SAR drives a digital-to-analog converter which provides the other input to the comparator.

The output of the comparator is fed to the SAR.

8.2 Features

I 8-bit, 4-channel multiplexed input, successive approximation ADC.

I On-chip wide range temperature sensor.

I Four result registers for each A/D.

I Six operating modes:

N Fixed channel, single conversion mode.

N Fixed channel, continuous conversion mode.

N Auto scan, single conversion mode.

N Auto scan, continuous conversion mode.

N Dual channel, continuous conversion mode.

N Single step mode.

I Three conversion start modes:

N Timer triggered start.

N Start immediately.

N Edge triggered.

I 8-bit conversion time of ≥1.61 µs at an A/D clock of 8.0 MHz.

I Interrupt or polled operation.

I Boundary limits interrupt.

I DAC output to a port pin with high output impedance.

I Clock divider.

I Power-down mode.

P89LPC9211FDH Datasheet(PDF) 47 Page - NXP Semiconductors