Is it possible to connect 2 modules of CC2520 to C5505ezdsp stick(probably one through UART and the other through SPI)
From the schematics of the board,it is seen that EEPROM is already connected using SPI. So,Is it still possible to use it for another interface?
Any help would be appreciated.
Thanks in advance.
Hello,
The CC2520 communicates only through SPI. See http://www.ti.com/lit/ds/symlink/cc2520.pdf
The C5505 DSP supports SPI with up to 4 chip selects (CS), which can support up to 4 CC2520 devices.
The C5505 eZdsp routes the SPI signals (CLK, MOSI, MISO, CS) to the edge connector, but it only routes one chip select - SPI CS1...
You could blue-wire the SPI CS0 signal from the EEPROM (R68) to the edge connector (or second CC2520 device). Might need to keep the SPI EEPROM as a bootloader source.
SPI CS2 and CS3 are not routed from the DSP, so they cannot be blue-wired...
Alternately, the C5515 eZdsp and C5535 eZdsp route all 4 SPI CS signals to edge connector. These devices are S/W compatible with C5505.
Hope this helps,
Mark
