User's Guide
Table Of Contents
- XBee/XBee-PRO S2C 802.15.4 RF Module User Guide
- Technical specifications
- Hardware
- Configure the XBee/XBee-PRO S2C 802.15.4 RF Module
- Modes
- Operation
- AT commands
- Special commands
- Networking and security commands
- C8 (802.15.4 Compatibility)
- CH (Operating Channel)
- ID (Network ID)
- DH (Destination Address High)
- DL (Destination Address Low)
- MY (Source Address)
- SH (Serial Number High)
- SL (Serial Number Low)
- MM (MAC Mode)
- RR (XBee Retries)
- RN (Random Delay Slots)
- ND (Network Discovery)
- NT (Node Discover Timeout)
- NO (Node Discovery Options)
- DN (Discover Node)
- CE (Coordinator Enable)
- SC (Scan Channels)
- SD (Scan Duration)
- A1 (End Device Association)
- A2 (Coordinator Association)
- AI (Association Indication)
- DA (Force Disassociation)
- FP (Force Poll)
- AS (Active Scan)
- ED (Energy Detect)
- EE (Encryption Enable)
- KY (AES Encryption Key)
- NI (Node Identifier)
- NP (Maximum Packet Payload Bytes)
- RF interfacing commands
- Sleep commands
- Serial interfacing commands
- I/O settings commands
- D0 (DIO0/AD0)
- D1 (DIO1/AD1)
- D2 (DIO2/AD2)
- D3 (DIO3/AD3)
- D4 (DIO4)
- D5 (DIO5/ASSOCIATED_INDICATOR)
- D8 (DIO8/SLEEP_REQUEST)
- P0 (RSSI/PWM0 Configuration)
- P1 (PWM1 Configuration)
- P2 (SPI_MISO)
- M0 (PWM0 Duty Cycle)
- M1 (PWM1 Duty Cycle)
- P5 (SPI_MISO)
- P6 (SPI_MOSI Configuration)
- P7 (SPI_SSEL )
- P8 (SPI_SCLK)
- P9 (SPI_ATTN)
- PR (Pull-up/Down Resistor Enable)
- PD (Pull Up/Down Direction)
- IU (I/O Output Enable)
- IT (Samples before TX)
- IS (Force Sample)
- IO (Digital Output Level)
- IC (DIO Change Detect)
- IR (Sample Rate)
- RP (RSSI PWM Timer)
- I/O line passing commands
- Diagnostic commands
- Command mode options
- Operate in API mode
- API mode overview
- API frame specifications
- Escaped characters in API frames
- Frame descriptions
- TX Request: 64-bit address frame - 0x00
- TX Request: 16-bit address - 0x01
- AT Command frame - 0x08
- AT Command - Queue Parameter Value frame - 0x09
- Remote AT Command Request frame - 0x17
- RX Packet: 64-bit Address frame - 0x80
- Receive Packet: 16-bit address frame - 0x81
- RX (Receive) Packet: 64-bit address IO frame- 0x82
- RX Packet: 16-bit address I/O frame - 0x83
- AT Command Response frame - 0x88
- TX Status frame - 0x89
- Modem Status frame - 0x8A
- Remote Command Response frame - 0x97
- Regulatory information
- Load 802.15.4 firmware on ZB devices
- Migrate from XBee through-hole to surface-mount devices
- PCB design and manufacturing
Hardware Design notes
XBee/XBee-PRO S2C 802.15.4 RF Module User Guide
27
n The top layer has an RF trace running from pin 36 of the device to the RF pin of the RPSMA
connector. The RF trace's width determines the impedance of the transmission line with
relation to the ground plane. Many online tools can estimate this value, although you should
consult the PCB manufacturer for the exact width. Assuming d = 0.025 in, and that the
dielectric has a relative permittivity of 4.4, the width in this example will be approximately
0.045 in for a 50 Ω trace. This trace width is a good fit with the module footprint's 0.060 in pad
width.
We do not recommend using a trace wider than the pad width, and using a very narrow trace can
cause unwanted RF loss. You can minimize the length of the trace by placing the RPSMA jack close to
the module. All of the grounds on the jack and the module are connected to the ground planes directly
or through closely placed vias. Space any ground fill on the top layer at least twice the distance d (in
this case, at least 0.050 in) from the microstrip to minimize their interaction.
Number Description
1
XBee surface-mount pin 36
2 50 Ω microstrip trace
3 Back off ground fill at least twice the distance between layers 1 and 2