EV-GM-00-1.0 SkyeTek, EV-GM-00-1.0 Datasheet - Page 30

• 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
11.3 SPI
The SkyeModule Gemini provides a simple four-wire SPI host interface. There is also an optional data
ready signal to indicate that the current command is complete and data is available for the host. Figure
11-4 shows an example of a host interface connection using SPI.
The protocol for requests to the SkyeModule Gemini is outlined below:
The timing diagram in Figure 11-5 illustrates this behavior.
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The data packet exchange between the host (SPI Master) and the Gemini (SPI Slave) uses
SkyeTek Protocol v3 (Binary Mode only). See more about the protocol in section 13,
Communicating with the Module.
The host must implement SPI master functionality.
The SCK line is the master clock controlled by the host and should remain low during idle state.
The slave select line is active low.
The data is setup on the rising edge of SCK.
The message data is latched on the falling edge of SCK.
The MOSI signal line provides the data from the host to the SkyeModule Gemini.
Supports data rates up to 4 MBit
Both 3.3V and 5V logic levels are allowed. See logic levels in section 8.1, Electrical
Characteristics.
SkyeModule Gemini
(Optional Data Ready)
Figure 11-4: SPI Connection Diagram
J3 – Pin 24
J3 – Pin 22
J3 – Pin 20
J3 – Pin 18
GPIO3_DR
J3 – Pin 7
MOSI
MISO
SSEL
SCK
SSEL
SCK
MOSI
MISO
Data Ready
(Optional GPIO input)
3.3V or 5V Levels
SPI Master
1525 Market St. Ste 200
Denver, CO 80202
www.skyetek.com
Skyetek Inc
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