參數(shù)資料
型號： TMS320F2801X
廠商： Texas Instruments, Inc.
元件分類： 數(shù)字信號處理
英文描述： Digital Signal Processors
中文描述： 數(shù)字信號處理器
文件頁數(shù)： 127/140頁
文件大小： 1108K
代理商： TMS320F2801X
www.ti.com
Analog Input on
Channel Ax
Analog Input on
Channel Bx
ADC Clock
Sample and Hold
SH Pulse
t
SH
t
dschA0_n
t
dschB0_n
t
dschB0_n+1
Sample n
Sample n+1
Sample n+2
t
dschA0_n+1
t
d(SH)
ADC Event Trigger from
ePWM or Other Sources
SMODE Bit
TMS320F2809, TMS320F2808, TMS320F2806
TMS320F2802, TMS320F2801
TMS320C2802, TMS320C2801, and TMS320F2801x DSPs
SPRS230J–OCTOBER 2003–REVISED SEPTEMBER 2007
6.10.7.4
Simultaneous Sampling Mode (Dual-Channel) (SMODE = 1)
In simultaneous mode, the ADC can continuously convert input signals on any one pair of channels
(A0/B0 to A7/B7). The ADC can start conversions on event triggers from the ePWM, software trigger, or
from an external ADCSOC signal. If the SMODE bit is 1, the ADC will do conversions on two selected
channels on every Sample/Hold pulse. The conversion time and latency of the result register update are
explained below. The ADC interrupt flags are set a few SYSCLKOUT cycles after the Result register
update. The selected channels will be sampled simultaneously at the falling edge of the Sample/Hold
pulse. The Sample/Hold pulse width can be programmed to be 1 ADC clock wide (minimum) or 16 ADC
clocks wide (maximum).
NOTE
In simultaneous mode, the ADCIN channel pair select has to be A0/B0, A1/B1, ..., A7/B7,
and not in other combinations (such as A1/B3, etc.).
Figure 6-25. Simultaneous Sampling Mode Timing
Table 6-42. Simultaneous Sampling Mode Timing
AT 12.5 MHz
ADC CLOCK,
t
c(ADCCLK)
= 80 ns
SAMPLE n
SAMPLE n + 1
REMARKS
t
d(SH)
Delay time from event trigger to
sampling
Sample/Hold width/Acquisition
Width
Delay time for first result to
appear in Result register
Delay time for first result to
appear in Result register
Delay time for successive results
to appear in Result register
Delay time for successive results
to appear in Result register
2.5t
c(ADCCLK)
t
SH
(1 + Acqps) *
t
c(ADCCLK)
4t
c(ADCCLK)
80 ns with Acqps = 0
Acqps value = 0-15
ADCTRL1[8:11]
t
d(schA0_n)
320 ns
t
d(schB0_n)
5t
c(ADCCLK)
400 ns
t
d(schA0_n+1)
(3 + Acqps) * t
c(ADCCLK)
240 ns
t
d(schB0_n+1)
(3 + Acqps) * t
c(ADCCLK)
240 ns
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Electrical Specifications
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TMS320F280200DAS 功能描述:32位微控制器 - MCU Piccolo Micro controller RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
TMS320F280200DAT 功能描述:32位微控制器 - MCU Piccolo Micro controller RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
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