參數(shù)資料
型號: P89LPC915
廠商: NXP Semiconductors N.V.
英文描述: 8-bit microcontrollers with accelerated two-clock 80C51 core 2 kB 3 V Flash with 8-bit A/D converter
中文描述: 8 - 8加速雙位單片機80C51的時鐘核心2 Kb的3伏閃存位A / D轉(zhuǎn)換器
文件頁數(shù): 32/72頁
文件大小: 344K
代理商: P89LPC915
Philips Semiconductors
P89LPC915/916/917
8-bit microcontrollers with accelerated two-clock 80C51 core
Product data
Rev. 04 — 17 December 2004
32 of 72
9397 750 14397
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9.9 A/D converter
9.9.1
General description
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
Figure 11
. The A/D consists of a 4-input multiplexer which feeds a
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.
+
COMP
DAC1
SAR
8
INPUT
MUX
CONTROL
LOGIC
CCLK
002aaa783
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