CLKIN/XTALI1XTALO2CLKOUT/EECS#/A03FSYNC#/D64VD3.35GND6VDA7SS#/RTS#/D78MISO/RXD/RD#9MOSI/TXD/WR#10SCLK/CTS#/CS#11RESET#12C2A13C1A14AOUT/INT#15INT#/DO16RI#/D117SDI/EESD/D218VDB19GND20VD3.321ESC/D322DCD#/D423SDO/EECLK/D524