P89LPC915 PHILIPS [NXP Semiconductors], P89LPC915 Datasheet - Page 32

• Manufacturer Part Number: P89LPC915
• Description: 8-bit microcontrollers with accelerated two-clock 80C51 core 2 kB 3 V Flash with 8-bit A/D converter
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
9397 750 14397
Product data
9.9.1 General description
9.9 A/D converter
The P89LPC915/916/917 has an 8-bit, 4-channel multiplexed successive
approximation analog-to-digital converter. A block diagram of the A/D converter is
shown in
sample-and-hold 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 11. ADC block diagram.
Figure
INPUT
MUX
Rev. 04 — 17 December 2004
11. The A/D consists of a 4-input multiplexer which feeds a
8-bit microcontrollers with accelerated two-clock 80C51 core
COMP
+
–
P89LPC915/916/917
DAC1
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
CCLK
SAR
8
CONTROL
LOGIC
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