参数资料
| 型号： | EVAL-ADE7953EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 57/72页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADE7953 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电度表/功率表 |
| 已用 IC / 零件： | ADE7953 |
| 主要属性： | 3 通道 |
| 次要属性： | USB 接口 |
| 已供物品： | 2 板，CD |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页当前第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页
Data Sheet
COMMUNICATION VERIFICATION AND SECURITY
ADE7953
The ADE7953 includes three security measures to increase
communication robustness and to help prevent inadvertent
modifications to its internal registers. The write protection,
communication verification, and checksum features can be
used together to help increase the robustness and noise
immunity of the meter design.
WRITE PROTECTION
The ADE7953 provides a simple method for protecting the
internal registers from unexpected write operations. This feature
helps to prevent noise or EMC conditions from changing the
required meter configuration. The write protection feature is
disabled by default to allow the meter to be configured and can
be enabled by writing to the 8-bit WRITE_PROTECT register
(Address 0x040). Only the three LSBs of this register are used.
Bit 0 controls the protection on the 8-bit registers; Bit 1 controls
the protection on the 16-bit registers; Bit 2 controls the protection
on the 24-bit/32-bit registers. All bits are set to 0 by default to
disable the protection. Setting any of these bits to 1 enables
write protection on the corresponding group of registers. When
write protection is enabled, any attempted write operation using
the SPI, I 2 C, or UART interface is ignored. The one exception to
this is the WRITE_PROTECT register that can still be modified
to disable the write protection feature. Resetting the WRITE_
PROTECT bits to 0 reinstates full access to the register banks.
The WRITE_PROTECT bits are included in the CRC check
and set off an interrupt when CRC_ENABLE is set to 1 and the
WRITE_PROTECT bit is changed.
COMMUNICATION VERIFICATION
The ADE7953 includes a set of three registers that allow any
communication via SPI, I 2 C, or UART to be verified. The
LAST_OP (Address 0x0FD), LAST_ADD (Address 0x1FE),
and LAST_RWDATA registers record the type, address, and
data of the last successful communication, respectively. The
LAST_RWDATA register has four separate addresses, depending
Multiple address locations are included to prevent unnecessarily
long communications.
Table 11. Addresses of the LAST_RWDATA Registers
Register Address Length of Read/Write
Address 0x0FF 8 bits
Address 0x1FF 16 bits
Address 0x2FF 24 bits
Address 0x3FF 32 bits
After each successful communication with the ADE7953 , the
address of the last register that was accessed is stored in the
16-bit LAST_ADD register (Address 0x1FE). This read-only
register stores the value until the next successful read or write
is complete.
The LAST_OP register (Address 0x0FD) stores the type of the
communication, that is, it indicates whether a read or a write
was performed. If the last operation was a write, the LAST_OP
register stores the value 0xCA. If the last operation was a read,
the LAST_OP register stores the value 0x35.
The LAST_RWDATA register stores the data that was written to
or read from the register. Unsuccessful read and write operations
are not reflected in these registers.
Rev. B | Page 57 of 72
相关PDF资料 |
PDF描述 |
|---|---|
| EVAL-ADF4002EBZ1 | BOARD EVAL FOR ADF4002 |
| EVAL-ADG788EBZ | BOARD EVALUATION FOR ADG788 |
| EVAL-ADM1021AEB | BOARD EVAL FOR ADM1021 |
| EVAL-ADM1023EB | BOARD EVAL FOR ADM1023 |
| EVAL-ADM1031EB | BOARD EVAL FOR ADM1031 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-ADF4001EBZ2 | 制造商:Analog Devices 功能描述:Evaluation Board For Pll Frequency Synthesizer 制造商:Analog Devices 功能描述:ADF4001 PLL SYNTHESIZER EVAL BOARD |
| EVAL-ADF4002EB1 | 制造商:Analog Devices 功能描述:EVAL BOARD - Bulk |
| EVAL-ADF4002EBZ1 | 功能描述:BOARD EVAL FOR ADF4002 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板 |
| EVAL-ADF4007EBZ1 | 功能描述:BOARD EVALUATION FOR ADF4007EB1 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PSoC® 主要目的:电源管理，热管理 嵌入式:- 已用 IC / 零件:- 主要属性:- 次要属性:- 已供物品:板，CD，电源 |
| EVAL-ADF4106EB1 | 制造商:Analog Devices 功能描述:PLL, Frequency Synthesizer |
发布紧急采购，3分钟左右您将得到回复。