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参数资料
型号： TMS320C2812ZHHS
厂商： TEXAS INSTRUMENTS INC
元件分类： 数字信号处理
英文描述： 16-BIT, 150 MHz, OTHER DSP, PBGA179
封装： LEAD FREE, BGA-179
文件页数： 51/156页
文件大小： 1826K
代理商： TMS320C2812ZHHS
Electrical Specifications
144
April 2001 Revised October 2005
SPRS174M
6.30.7
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 Event Managers (EVA/EVB), 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.).
Analog Input on
Channel Ax
Analog Input on
Channel Bv
ADC Clock
Sample and Hold
SH Pulse
tSH
tdschA0_n
tdschB0_n
tdschB0_n+1
Sample n
Sample n+1
Sample n+2
tdschA0_n+1
td(SH)
ADC Event Trigger
from EV or Other
Sources
SMODE Bit
Figure 641. Simultaneous Sampling Mode Timing
Table 646. Simultaneous Sampling Mode Timing
SAMPLE n
SAMPLE n + 1
AT 25-MHz
ADC CLOCK,
tc(ADCCLK) =
40 ns
REMARKS
td(SH)
Delay time from event
trigger to sampling
2.5tc(ADCCLK)
tSH
Sample/Hold width/
Acquisition Width
(1 + Acqps) * tc(ADCCLK)
40 ns with
Acqps = 0
Acqps value = 015
ADCTRL1[8:11]
td(schA0_n)
Delay time for first result
to appear in Result
register
4tc(ADCCLK)
160 ns
td(schB0_n)
Delay time for first result
to appear in Result
register
5tc(ADCCLK)
200 ns
td(schA0_n+1)
Delay time for
successive results to
appear in Result register
(3 + Acqps) * tc(ADCCLK)
120 ns
td(schB0_n+1)
Delay time for
successive results to
appear in Result register
(3 + Acqps) * tc(ADCCLK)
120 ns
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相关代理商/技术参数
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TMS320C28341 制造商:TI 制造商全称:Texas Instruments 功能描述:Delfino Microcontrollers
TMS320C28341ZEPQ 制造商:Texas Instruments 功能描述:DELFINO MICROCONTROLLER - Trays
TMS320C28341ZFEQ 功能描述:32位微控制器 - MCU Delfino MCU RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT
TMS320C28341ZFET 功能描述:32位微控制器 - MCU Delfino MCU RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT
TMS320C28341ZHHT 功能描述:32位微控制器 - MCU Delfino MCU RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT
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