Digi XBee-PRO XSC - Xbee-PRO XSC Electrical Characteristics; Xbee-PRO XSC Timing Specifications

XBee‐PRO®900HP/XBee‐PRO®XSCRFModules
©2014DigiInternationalInc. 97
Xbee-PRO XSC Electrical Characteristics
SystemBlockDiagramBasicwirelesslinkbetweenhosts
The data flow sequence is initiated when the first byte of data is received in the DI Buffer of the transmitting
module (XBee Module A). As long as XBee Module A is not already receiving RF data, data in the DI Buffer is
packetized, then transmitted over-the-air to XBee Module B.
XBee-PRO XSC Timing Specifications
TimingSpecifications(“A”and“B”refertoFigure.)






A Transmits over air
B Receives
T
ST
T
TX
T
TL
T
RL
Host A sends serial data to XBee Module A
After T , contents of D Buffer
are assembled into packet and transmitted
IN
TX/PWR LED on XBee Module A pulses off
briefly to indicate RF transmission
If 16-bit CRC checks out, data is shifted out
serial port to Host B
(Optional) Set ATCS = 1 to use CTS as RS-485
TX enable low-asserted signal
RX LED pulses on briefly to indicate RF reception
DA
IN
RF A
OUT
TX LED A
D B
OUT
RX LED B
CTS B
ST
T
CLDL
T
CHDH