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| 型號(hào)： | P80C591SFA |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Single-chip 8-bit microcontroller with CAN controller |
| 中文描述： | 8-BIT, 16 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, SOT-187-2, LCC-44 |
| 文件頁(yè)數(shù)： | 125/161頁(yè) |
| 文件大小： | 588K |
| 代理商： | P80C591SFA |
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1999 Aug 19
125
Philips Semiconductors
Objective Specification
Single-chip 8-bit microcontroller with CAN controller
P8xC591
Fig.48 Functional diagram of Analog Input Circuitry.
handbook, full pagewidth
MHI050
INTERNAL BUS
ANALOG INPUT
MULTIPLEXER
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
n.c.
n.c.
ANALOG GROUND
ANALOG REF.
+
1
2
0
4
5
6
7
3
10-BIT A/D CONVERTER
1
2
0
4
5
6
7
ADCH
ADCON
3
20.3
10-Bit Analog-to-Digital Conversion
Figure 48 shows the elements of a successive
approximation (SA) ADC. The ADC contains a DAC which
converts of a successive approximation register to a
voltage (VDAC) which is compared to the analog input
voltage (V
IN
). The output of the comparator is fed to the
successive approximation control logic which controls the
successive approximation register. A conversion is
initiated by setting ADCS in ADCON register. ADCS can
bet set by software only.
The software start mode is selected when control bit
ADCON.5 (ADEX) = 0. A conversion is then started by
setting control bit ADCON.3 (ADCS). The software start
mode is selected when ADCON.5 = 1, and a conversion
may be started by setting ADCON.3.
When a conversion is initiated, the conversion starts at the
beginning of the machine cycle which follows the
instruction that sets ADCS. ADCS is actually implemented
with two flip-flops; a command flip-flop which is affected by
set operations, and a status flag which is accessed during
read operations.
The next two machine cycles are used to initiate the
converter. At the end of the first cycle, the ADCS status
flag is set and a value of “1” will be returned if the ADCS
flag is read while the conversion is progress. Sampling of
the analog input commences at the end of the second
cycle.
During the next eight machine cycles, the voltage at the
previously selected pin of port 1 is sampled, and this input
voltage should be stable in order to obtain a useful sample.
In any event, the input voltage slew rate must be less than
10 V/ms in order to prevent an undefined result.
The successive approximation control logic first sets the
most significant bit and clears all other bits in the
successive approximation register (10 0000 0000B). The
output of the DAC (50% full scale) is compared to the input
voltage V
IN
. If the input voltage is greater than VDAC, then
the bit remains set; otherwise it is cleared.
The successive approximation control logic now sets the
next most significant bit (11 0000 0000B or
01 0000 0000B, depending on the previous result), and
VDAC is compared to V
IN
again. If the input voltage is
greater than VDAC, then the bit being tested remains set;
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| P83C591SFA | Single-chip 8-bit microcontroller with CAN controller |
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| P80C591SFB | Single-chip 8-bit microcontroller with CAN controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P80C591SFB | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single-chip 8-bit microcontroller with CAN controller |
| P80C592 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontroller with on-chip CAN |
| P80C592FFA | 制造商:NXP Semiconductors 功能描述: |
| P80C592FFA/00,512 | 功能描述:8位微控制器 -MCU 80C51 W/CAN 16MHZ ROMLESS RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| P80C592FFA/00,512 | 制造商:NXP Semiconductors 功能描述:8BIT MCU+CAN, SMD, 80C592, PLCC68 |
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