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參數資料
| 型號： | EVAL-AD7291SDZ |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 17/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR AD7291 |
| 標準包裝： | 1 |
| ADC 的數量： | 8 |
| 位數： | 12 |
| 采樣率（每秒）： | 22.22k |
| 數據接口： | I²C |
| 已用 IC / 零件： | AD7291 |
| 已供物品： | 板 |
| 相關產品： | AD7291BCPZ-RL7-ND - IC ADC I2C/SRL 22.22K 20LFCSP AD7291BCPZ-ND - IC ADC 12BIT SAR 8CH 20-LFCSP |
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Data Sheet
AD7291
Rev. B | Page 23 of 28
READING DATA FROM THE AD7291
READING TWO BYTES OF DATA FROM A 16-BIT
REGISTER
Reading the contents from any of the 16-bit registers is a 2-byte
read operation. In this protocol, the first part of the transaction
writes to the register pointer. When the register address has
been set up, any number of reads can be performed from that
particular register without having to write to the address
pointer register again. When the required number of reads
is completed, the master should not acknowledge the final
byte. This tells the slave to stop transmitting, allowing a stop
condition to be asserted by the master. Further reads from
this register can be performed in a future transaction without
having to rewrite to the register pointer.
If a read from a different address is required, the relevant
register address has to be written to the address pointer register
and, again, any number of reads from this register can then be
performed. In the following example, the master device reads
three lots of 2-byte data from a slave device but as many lots
consisting of two bytes can be read as required. This protocol
assumes that the particular register address has been set up by
a single-byte write operation to the address pointer register.
Reading two bytes of data from a 16-bit register consists of the
following sequence (see Figure 27):
1.
The master device asserts a start condition on SDA.
2.
The master sends the 7-bit slave address followed by the
read bit (high).
3.
The addressed slave device asserts an acknowledge on SDA.
4.
The master receives a data byte.
5.
The master asserts an acknowledge on SDA.
6.
The master receives a second data byte.
7.
The master asserts an acknowledge on SDA.
8.
The master receives a data byte.
9.
The master asserts an acknowledge on SDA.
10. The master receives a second data byte.
11. The master asserts an acknowledge on SDA.
12. The master receives a data byte.
13. The master asserts an acknowledge on SDA.
14. The master receives a second data byte.
15. The master asserts a not acknowledge on SDA to notify the
slave that the data transfer is complete.
16. The master asserts a stop condition on SDA to end the
transaction.
087
11
-06
0
S
A
P
...
1
A
SLAVE ADDRESS
DATA[7:0]
DATA[15:8]
FROM MASTER TO SLAVE
FROM SLAVE TO MASTER
S = START CONDITION
SR = REPEATED START
P = STOP CONDITION
A = ACKNOWLEDGE
A = NOT ACKNOWLEDGE
Figure 27. Reading Three Lots of Two Bytes of Data from the Conversion Result Register
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相關代理商/技術參數 |
參數描述 |
|---|---|
| EVAL-AD7292SDZ | 功能描述:數據轉換 IC 開發(fā)工具 EVALUATION BOARD RoHS:否 制造商:Texas Instruments 產品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| EVAL-AD7294EBZ | 功能描述:BOARD EVALUATION FOR AD7294 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數轉換器 (ADC) 系列:- 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:- ADC 的數量:1 位數:12 采樣率（每秒）:94.4k 數據接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標準）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| EVAL-AD7298SDZ | 功能描述:BOARD EVAL FOR AD7298 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數轉換器 (ADC) 系列:- 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:- ADC 的數量:1 位數:12 采樣率（每秒）:94.4k 數據接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標準）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| EVAL-AD7298SDZ | 制造商:Analog Devices 功能描述:EVAL BOARD, AD7192 12BIT ADC |
| EVAL-AD7321CB | 制造商:AD 制造商全稱:Analog Devices 功能描述:500 kSPS, 2-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC |
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