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| 型号： | RWD-MIFARE |
| 厂商： | RF Solutions |
| 文件页数： | 5/35页 |
| 文件大小： | 0K |
| 描述： | MOD RCVR RFID MIFARE 13.56MHZ |
| 标准包装： | 1 |
| 系列： | MIFARE® |
| RF 型： | 读/写 |
| 频率： | 13.56MHz |
| 封装/外壳： | 24-DIP 模块 |
| 供应商设备封装： | 模块 |
| 包装： | 散装 |
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The CTS line remains in a LOW state while the command and data bytes are being received.
After the last byte of data the CTS signal “times out” for 6ms and returns HIGH.
This 6ms “window” every polling cycle allows the host computer to send a single command
and associated data to the RWD. Please note that only one command and it’s corresponding
data bytes can be sent during a CTS LOW period, the command and data bytes must be sent
with no gaps between, if there is a pause of more than 6ms between bytes then “time out”
occurs, the CTS line returns high and the command fails (flagged as RS232 error). The CTS
signal idles in this HIGH state (to inhibit host communication) until the next polling cycle
begins.
The communication baud rate is 9600 baud, 8 bits, 1 stop, no parity. The RWD Tx, Rx and
CTS signals are all TTL level and can be converted to +/-10v RS232 levels using a level
converter device such as the MAX202 (note the inversion of the TTL levels).
The Micro RWD MF LP (low-power) version has been specifically designed to operate
with very low average power consumption but still remain responsive to cards entering
and leaving the field and be able to read large amounts of data as quickly as possible.
THE RWD HAS THREE POLLING STATES:
1) NO card present and NO host commands received.
Polling cycle rate (time between subsequent CTS low periods) is determined by the
“polling rate” parameter stored in the RWD EEPROM memory. This is typically set
to a long period (4ms to 8 seconds, default setting 260mS) and is the primary means to
reduce average power consumption. This is because most of the polling cycle period is
spent in a power-down/sleep mode.
CTS
Not to scale
TTL levels
5v
Polling cycle
0v
6ms
(CTS timeout)
Polling cycle period set by RWD EEPROM
parameter (4ms to 8 seconds, default 1 second)
RF OFF, Power-down/sleep period
repeats
RF ON for brief period
(to check for card)
2) Mifare card in field, NO host commands received .
When a card is detected in the field the polling rate changes to approximately 100ms
(between CTS low periods). This is to ensure that the RWD can respond quickly to the
card leaving the field and a new card being presented.
CTS
Not to scale
TTL levels
5v
100ms polling rate
100ms polling rate
Polling cycle
0v
6ms (CTS timeout)
RF OFF, Power-down/sleep period
RF ON for brief period (to check for card)
5
repeats
相关PDF资料 |
PDF描述 |
|---|---|
| RWD-QT | MODULE RCVR RFID QUAD TAG |
| RXD-433-KH2 | RECEIVER/DECODER 433MHZ KH2 SER |
| RXM-418-LC-S | RECEIVER RF 418MHZ SMT |
| RXM-418-LR_ | RECEIVER 418MHZ LR SERIES |
| RXM-869-ES_ | RECEIVER RF 869MHZ 16PIN SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RWD-MIFARE-OEM | 功能描述:MOD RCVR RFID MIFARE W/ANTENNA RoHS:是 类别:RF/IF 和 RFID >> RFID IC 系列:MIFARE® 其它有关文件:CR14 View All Specifications 标准包装:1 系列:- RF 型:收发器 频率:13.56MHz 特点:ISO14443-B 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SO 包装:Digi-Reel® 其它名称:497-5719-6 |
| RWD-QT | 功能描述:MODULE RCVR RFID QUAD TAG RoHS:是 类别:RF/IF 和 RFID >> RFID 读取模块 系列:- 产品目录绘图:DLP-RFID-UHF1B 标准包装:1 系列:- RF 型:读/写 频率:900MHz 特点:ISO 18000-6 a/b/c 封装/外壳:模块 供应商设备封装:模块 包装:散装 产品目录页面:635 (CN2011-ZH PDF) 其它名称:813-1029 |
| RWDU500-WCCV4 | 制造商:Pass & Seymour/Legrand 功能描述:WALL OCC/VAC SENSOR/DIMMER 3W 500W |
| RWE182M550DEN2S | 制造商:United Chemi-Con 功能描述:CGD550X218E N12F2D |
| RWE222M450C1N2S | 制造商:United Chemi-Con 功能描述:CGC450X222L N12F1A |
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