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Document Reference No.: FT_000550
Vinco Ethernet MP3 RTCShield Datasheet 1.0
Clearance No.: FTDI#256
2.5 Ethernet Operation
Ethernet is accessed via the Wiznet W5100 IC. This device converts Ethernet data to SPI data and vice
versa. The SPI port is a slave to the VNC2 SPI Master. Ethernet, SPI Master and GPIO drivers are
supplied with the Vinculum-II Toolchain at VNC2 IDE to allow programming and reading data over the
SPI interface to the W5100 IC
Figure 2.1 –
SPI Master communicates with W5100 via the SPI bus
This Ethernet device will support TCP/IP and UDP protocol and allow for 10Mbps or 100Mbps transfers on
the Ethernet link.
All the Ethernet magnetics to support the Ethernet link are integrated into the RJ45 connector on the PCB
and as such the user only needs to supply a standard CAT5 cable to complete the link.
2.6 Real Time Clock Operation
The Real Time Clock (RTC) on the Ethernet/RTC/MP3 Shield is an NXP PCF2123 device. This is an SPI
peripheral accessed via the SPI Master on the Vinco baseboard. RTC, SPI Master and GPIO drivers are
available with the Vinculum-II Toolchain at VNC2 IDE to allow user applications access to the RTC Shield.
The device provides time and date information, allowing a possible mechanism to timestamp files
accessed with the Vinco base board on a USB memory device.
Time resolution is days, hours, minutes, seconds.
The calendar supports weekdays, months, years.
The RTC supports alarm and countdown timer functions.
Note: the board must be powered at all time to prevent the RTC losing its data.
3
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