EV-GM-00-1.0 SkyeTek, EV-GM-00-1.0 Datasheet - Page 34

• Manufacturer Part Number: EV-GM-00-1.0
• Description: RF Development Tools Gemini Eval Kit ISO14443, ISO18094
• Manufacturer: SkyeTek
• Type: RF Readersr

Specifications of EV-GM-00-1.0

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: ISO14443, ISO18092
• Frequency: 13.56 MHz
• Operating Supply Voltage: 5 V
• Description/function: Evaluation kit for SkyeModule Gemini NFC OEM reader module
• Interface Type: I2C, Serial, SPI, USB
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 20 C
• For Use With: ISO14443, ISO18092

Main 720.328.3425 Fax:[phone]
SkyeModule Gemini Datasheet
The communication scheme from host to module is as follows:
Wait for command to complete:
Communication scheme from module to host is as follows:
Recommended response handler method #1 (polling):
Recommended response handler method #2 (using data ready signal):
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Initiate a start condition (SDA transitions low while SCL is high).
Send the nine bits of the initial start packet as follows:
Use the bus to clock each byte of the SkyeTek protocol request.
After sending the entire request, initiate a stop condition. (SCL transitions high, and then SDA
transitions high while SCL is high)
The GPIO3_DR (data ready) signal will transition high when data is available for the host to read.
If data ready is not implemented on the host, the host can poll the module after the request is
sent. The module will NAK to a read while it is busy executing a command.
Initiate a start condition. (SDA transitions low, and then SCL transitions low.)
Send the nine bits of the initial start packet as follows:
Clock each byte of the SkyeTek protocol response from the module.
After receiving the response, is received, initiate a stop condition. (SDA transitions high while SCL
is high.)
SDA must transition while the clock is low and remain stable while the clock is high.
Response data will be thrown away if not read within 10 seconds of becoming available.
Read a single byte continuously until the reader ACKs and a 0x02, start of frame is received
Read two bytes which contain the message length
Read the remaining message length
Poll on the data ready signal until it transitions high, indicating that data is present
Read three bytes, the last two contain the message length
Read the remaining message length
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Send the 7-bit address.
Send a write bit as the eighth bit (0 for writing from the host to the slave).
Send the ninth bit as the “acknowledge” bit (ACK)
If the reader recognizes the address, it pulls SDA low to acknowledge
Send the 7-bit address.
Send a read bit as the eighth bit (1 for reading from the slave to the host).
Send the ninth bit as the “acknowledge” bit (ACK)
If the reader recognizes the address, it pulls SDA low to acknowledge
If the address isn’t recognized or the module is busy the SDA bit will remain high during
the ACK bit.
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Skyetek Inc
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