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| 型号： | ADE7953ACPZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 51/72页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING 1PH 28LFCSP |
| 标准包装： | 5,000 |
| 输入阻抗： | 660 千欧 |
| 测量误差： | 0.1% |
| 电压 - 高输入/输出： | 2.4V |
| 电压 - 低输入/输出： | 0.4V |
| 电流 - 电源： | 6.8mA |
| 电源电压： | 3 V ~ 3.6 V |
| 测量仪表类型： | 单相 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 28-LFCSP-WQ（5x5） |
| 包装： | 带卷 (TR) |
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Data Sheet
COMMUNICATING WITH THE ADE7953
All ADE7953 features can be accessed via a group of on-chip
registers. For a detailed list of all the registers, see the ADE7953
Registers section. Three different communication interfaces can
be used to access the on-chip registers.
ADE7953
Therefore, although Pin 25 (SCLK) and Pin 28 (CS) are not
required if communicating via I 2 C or UART, these pins should
be configured in hardware as shown in Table 9 to ensure the
functionality of the autodetection system.
?
?
?
4-pin SPI interface
2-pin bidirectional I 2 C interface
2-pin UART interface
LOCKING THE COMMUNICATION INTERFACE
After the selected communication interface is established, the
interface should be locked to prevent the communication
All three communication options use the same group of pins
and, therefore, only one method of communication should be
used in each design.
COMMUNICATION AUTODETECTION
The ADE7953 contains a detection system that automatically
detects which of the three communication interfaces is being
used. This feature allows communication to be quickly estab-
lished with minimal initialization. Autodetection works by
monitoring the status of the four communication pins and
automatically selecting the communication interface that
method from inadvertently changing. The ADE7953 can be
configured to lock automatically after the first successful
communication.
The automatic lock feature is disabled by default and is enabled
by clearing the COMM_LOCK bit (Bit 15) in the CONFIG
register (Address 0x102). To successfully establish and lock the
communication interface, a write should be issued shortly after
power-up to the CONFIG register, clearing the COMM_LOCK
bit and thus locking the communication interface. When the
communication interface is locked to a specific method (that is,
SPI, I 2 C, or UART), the communication method cannot be
?
?
The CS pin (Pin 28) is used to determine whether the
communication method is SPI. The pin must be low
during the SPI communication for this interface method.
The CS pin is active low and will automatically lock onto
SPI communication as a result.
The SCLK pin (Pin 25) is used to determine whether the
Note that if using the SPI communication interface to lock
the communication mode, the CS pin must be low for a
minimum of 1.2 μs after the last SCLK. This delay is required
only when writing to the COMM_LOCK bit (see the SPI
communication method is I 2 C or UART. If this pin is held
high, the communication interface is set to I 2 C; if it is held
low, the communication interface is set to UART.
Table 9. Communication Autodetection
Communication Interface
SPI
I 2 C
UART
Pin 28 (CS)
0
1
1
Pin 25 (SCLK)
Don’t care
1
0
Pin 27 (MOSI/SCL/Rx)
MOSI
SCL
Rx
Pin 26 (MISO/SDA/Tx)
MISO
SDA
Tx
Rev. B | Page 51 of 72
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| ADE7978ACPZ | 制造商:Analog Devices 功能描述: |
| ADE7978ACPZ-RL | 功能描述:3 Phase Meter IC 28-LFCSP-WQ (5x5) 制造商:analog devices inc. 系列:- 包装:带卷（TR） 零件状态:在售 输入阻抗:280 千欧 测量误差:- 电压 - I/O 高:2.4V 电压 - I/O 低:0.8V 电流 - 电源:10.6mA 电压 - 电源:2.97 V ~ 3.63 V 表计类型:3 相 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-WFQFN 裸露焊盘，CSP 供应商器件封装:28-LFCSP-WQ（5x5） 标准包装:5,000 |
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