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Technical specifications
Serial communication specifications
The XBee/XBee-PRO S2C 802.15.4 RF Module supports both Universal Asynchronous Receiver /
Transmitter (UART) and Serial Peripheral Interface (SPI) serial connections.
UART pin assignments
The SC1 (Serial Communication Port 1) of the Ember 357 is connected to the UART port. The following
table provides the UART pin assignments.
Specifications
UART pins
DOUT
DIN / CONFIG
CTS / DIO7
RTS / DIO6
SPI pin assignments
The SC2 (Serial Communication Port 2) of the Ember 357 is connected to the SPI port.
Specifications
SPI pins
SPI_SCLK
SPI_SSEL
SPI_MOSI
SPI_MISO
SPI_ATTN
GPIO specifications
XBee/XBee-PRO S2C 802.15.4 RF Modules have 15 General Purpose Input / Output (GPIO) ports
available. The exact list depends on the device configuration, as some GPIO pads are used for
purposes such as serial communication.
GPIO Electrical Specification
Low Schmitt switching threshold
High Schmitt switching threshold
Input current for logic 0
XBee/XBee-PRO S2C 802.15.4 RF Module User Guide
Module pin number
XBee (surface-mount)
3
4
25
29
Module pin number
XBee (surface-mount)
14
15
16
17
12
Serial communication specifications
XBee (through-hole)
2
3
12
16
XBee (through-hole)
18
17
11
4
19
Value
0.42 - 0.5 x VCC
0.62 - 0.8 x VCC
-0.5 µA
15
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