P89LPC924_925 NXP Semiconductors, P89LPC924_925 Datasheet - Page 18

• Manufacturer Part Number: P89LPC924_925
• Description: The P89LPC924/925 are single-chip microcontrollers designed for applicationsdemanding high-integration, low cost solutions over a wide range of performancerequirements
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 14471
Product data
8.9.1 General description
8.9 A/D converter
The P89LPC924/925 has an 8-bit, 4-channel multiplexed successive approximation
analog-to-digital converter module. A block diagram of the A/D converter is shown in
Figure
circuit providing an input signal to one of two comparator inputs. The control logic in
combination with the successive approximation register (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.
Fig 5. ADC block diagram.
5. The A/D consists of a 4-input multiplexer which feeds a sample-and-hold
INPUT
MUX
Rev. 03 — 15 December 2004
8-bit microcontrollers with accelerated two-clock 80C51 core
COMP
+
–
DAC1
P89LPC924/925
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
CCLK
SAR
8
CONTROL
LOGIC
002aaa791
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