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參數(shù)資料
| 型號(hào)： | ISO15693 |
| 廠商： | Fujitsu Limited |
| 英文描述： | High-speed RFID LSI FerVID family |
| 中文描述： | 高速大規(guī)模集成電路的RFID書中家庭 |
| 文件頁數(shù)： | 13/45頁 |
| 文件大?。?/td> | 257K |
| 代理商： | ISO15693 |
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MB89R118
13
3.
FRAM Data Protection if Power Lost During Data Writing
If the power to FRAM is lost while data is being written to it, data may take on unexpected values, possibly
adversely affecting system operation.
The MB89R118’s FRAM is accessed (updated) in byte units.
The MB89R118 circle confirms that the level of power supply voltage is sufficient before data is written to each
byte.
However, since write commands access more than one byte at once a power loss in the middle of write commands
may result in a mixture of new written data and still remaining old data. As a result, confirm success of a write
command with read command after each write command.
4.
Requests/Responses
A request is sent from the reader/writer to the transponder. In reply to the request, the transponder sends a
response to the reader/writer.
Each request, and each response, is transmitted in a single frame.
Structure of requests and responses
A request consists of the following 5 fields :
Flag
Command code
Parameter (required or optional depending on the command)
Application data
CRC
A response consists of the following 4 fields :
Flag
Parameter (required or option depending on the command)
Application data
CRC
Each byte is transferred, beginning with the lowest bit. When two or more bytes are transferred, transfer begins
with the lowest one.
Set the RFU_flag always to “0”.
5.
Operating Modes
The MB89R118 has the following 3 operating modes :
Each mode specifies a different mechanism for how the transponder returns a response in reply to a request
from the reader/writer :
Addressed mode
The MB89R118 enters addressed mode when the Address_flag is set to “1”.
In addressed mode, a request includes a UID (the Address_flag is set to “1” simultaneously), and only the
transponder that matches the UID in the request returns a response. If no transponder that matches the UID
exists, a response is not returned.
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| ISO15DW | 功能描述:RS-485接口IC Iso 3.3V Full & Half Duplex RS-485 Xcvr RoHS:否 制造商:Texas Instruments 數(shù)據(jù)速率:250 Kbps 工作電源電壓:3.3 V 電源電流:750 uA 工作溫度范圍:- 40 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| ISO15DW | 制造商:Texas Instruments 功能描述:Digital Isolator IC 制造商:Texas Instruments 功能描述:IC, RS-485 TRANSCEIVER, 3.6V, SOIC-16 |
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| ISO15DWR | 功能描述:隔離器接口集成電路 Iso 3.3V Full & Half Duplex RS-485 Xcvr RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 傳播延遲時(shí)間: 電源電壓-最大:5.5 V 電源電壓-最小:3 V 電源電流:3.6 mA 功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:SOIC-8 封裝:Tube |
| ISO15DWRG4 | 功能描述:隔離器接口集成電路 Iso 3.3V Full & Half Duplex RS-485 Xcvr RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 傳播延遲時(shí)間: 電源電壓-最大:5.5 V 電源電壓-最小:3 V 電源電流:3.6 mA 功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:SOIC-8 封裝:Tube |
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