參數(shù)資料
型號： ST10F168-Q2
廠商： STMICROELECTRONICS
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP144
封裝： 28 X 28 MM, PLASTIC, QFP-144
文件頁數(shù)： 27/76頁
文件大小： 483K
代理商： ST10F168-Q2
ST10F168
33/76
13 - A/D CONVERTER
A10-bit A/D converter with 16 multiplexed input
channels and a sample and hold circuit is
integrated on-chip. The sample time (for loading
the capacitors) and the conversion time is
programmable and can be adjusted to the
external circuitry.
Overrun error detection / protection is controlled
by the ADDAT register. Either an interrupt request
is generated when the result of a previous conver-
sion has not been read from the result register at
the time the next conversion is complete, or the
next conversion is suspended until the previous
result has been read. For applications which
require less than 16 analog input channels, the
remaining channel inputs can be used as digital
input port pins.
The AD converter of the ST10F168 supports dif-
ferent conversion modes :
– Single channel single conversion : the analog
level of the selected channel is sampled once
and converted. The result of the conversion is
stored in the ADDAT register.
–
Single channel continuous conversion : the
analog level of the selected channel is repeatedly
sampled and converted. The result of the conver-
sion is stored in the ADDAT register.
– Auto scan single conversion : the analog level
of the selected channels are sampled once and
converted. After each conversion the result is
stored in the ADDAT register. The data can be
transfered to the RAM by interrupt software
management or using the powerfull Peripheral
Event Controller data transfert.
– Auto scan continuous conversion : the ana-
log level of the selected channels are repeatedly
sampled and converted. The result of the con-
version is stored in the ADDAT register. The
data can be transfered to the RAM by interrupt
software management or using the powerfull
Peripheral Event Controller data transfert.
– Wait for ADDAT read mode : when using con-
tinuous modes, in order to avoid to overwrite
the result of the current conversion by the next
one, the ADWR bit of ADCON control register
must be activated. Then, until the ADDAT regis-
ter is read, the new result is stored in a tempo-
rary buffer and the conversion is on hold.
– Channel
injection
mode
:
when
using
continuous modes, a selected channel can be
converted in between
without
changing the
current operating mode. The 10 bit data of the
conversion are stored in ADRES field of
ADDAT2. The current continuous mode remains
active after the single conversion is completed.
The Table 17 shows conversion clock and sample
clock of the ADC unit. A complete conversion will
take 14tCC +2tSC + 4TCL. This time includes the
conversion it self, the sampling time and the time
required to transfer the digital value to the result
register. For example at 25MHz of CPU clock, the
minimum complete conversion time is 7.76
s.
The A/D converter provides automatic offset and
linearity self calibration. The calibration operation
is performed in two ways :
– A full calibration sequence is performed after a
reset and lasts 1.6ms minimum (at 25MHz CPU
clock). During this time, the ADBSY flag is set to
indicate the operation. Normal conversion can
be performed during this time. The duration of
the calibration sequence is then extended by the
time consumed by the conversions.
Note : After a power-on reset, the total
unadjusted error (TUE) of the ADC might be
worse than
±2LSB (max. ±4LSB). During the full
calibration sequence, the TUE is constantly
improved until at the end of the cycle, TUE is
within the specified limits of
±2LSB.
– One calibration cycle is performed after each
conversion : each calibration cycle takes 4 ADC
clock cycles. These operation cycles ensure
constant updating of the ADC accuracy, com-
pensating changing operating conditions.
Notes 1. See chapter XX.
2. tCC = TCL x 24.
Table 17 : ADC sample clock and conversion clock
ADCTC
Conversion Clock tCC
ADSTC
Sample Clock tSC
TCL1 = 1/2 x fXTAL
At fCPU = 25MHz
-
At fCPU = 25MHz
00
TCL x 24
0.48
s00
tCC
0.48
s2
01
Reserved, do not use
-
01
tCC x2
0.96
s2
10
TCL x 96
1.92
s10
tCC x4
1.92
s2
11
TCL x 48
0.96
s11
tCC x8
3.84
s2
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參數(shù)描述
ST10F168Q3 制造商:STMicroelectronics 功能描述:MicroController, 16-Bit, 144 Pin, Plastic, QFP
ST10F168-Q3 制造商:STMicroelectronics 功能描述:MicroController, 16-Bit, 144 Pin, Plastic, QFP
ST10F168-Q6 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:16-BIT MCU WITH 256K BYTE FLASH MEMORY AND 8K BYTE RAM
ST10F168SQ3 功能描述:16位微控制器 - MCU 256K Flash 8K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT
ST10F168SQ6 功能描述:16位微控制器 - MCU 256K Flash 8K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT
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