User Manual

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RC220x
2005 Radiocrafts AS RC220x Data Sheet (rev. 1.0) Page 5 of 17
31 GND System ground
32 RF RF I/O connection to antenna, 50 Ohm. Do not connect for integrated
antenna or connector variant.
33 GND System ground
34 GND System ground
35 Reserved Do not connect, PB0
36 SCLK SPI interface must be shared with MAC, PB1, ISP SCK
37 SI SPI interface must be shared with MAC, PB2, PDI for RC2202
38 SO SPI interface must be shared with MAC, PB3, PDO for RC2202
39 PB4 Digital I/O, PB4
40 Reserved Do not connect, PB5
41 Reserved Do not connect, PB6
42 PB7 Digital I/O, PB7
43 TOSC2 Internal 32.768 kHz oscillator
44 RESET Internal MCU reset. Active low with internal pull-up.
45 Reserved Do not connect, PD0 / INT0
46 Reserved Do not connect, PD1 / INT1
47 RXD1 Same as pin 9
48 TXD1 Same as pin 8
49 Reserved Do not connect, PD4
50 RTS1 Same as pin 6
51 Reserved Do not connect, PD6
52 CTS1 Same as pin 5
53 GND System ground
Note 1: UART interface: Pin 8 TXD1, pin 9 RXD1, pin 5 CTS1, pin 6 RTS1
Note 2: SPI interface: Pin 36 SCLK, pin 37 SI, pin 38 SO (chip select at any digital I/O) must be shared with internal
MAC software
Note 3: ISP (In-System Programming) interface: Pin 36 SCK, pin 21 PDI, pin 22 PDO, pin 44 RESET for RC2200 and
RC2204. Pin 36 SCK, pin 37 PDI, pin 38 PDO, pin 44 RESET for RC2202. See page 8 for more information.
Note 4: JTAG interface: Pin 12 TDI, pin 13 TDO, pin 14 TMS, pin 15 TCK, pin 44 RESET. See page 8 for more
information.