SX1211SK915 Semtech, SX1211SK915 Datasheet - Page 13

• Manufacturer Part Number: SX1211SK915
• Description: KIT STARTER FOR SX1211 915MHZ
• Manufacturer: Semtech
• Type: Transceiver, ISMr

Specifications of SX1211SK915

• Frequency: 915MHz
• For Use With/related Products: SX1211 (915MHz)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.3
Brief explanation of Figure 4.1
4.4
4.4.1
The Ping-Pong Test provides the user a means to demonstrate practical two-way radio
communications between two processor boards with SX1211 RF modules attached. The Ping Pong
mode can be a valuable test facility when conducting on-site and range tests.
A Default Ping Pong Test program is embedded within a SEMTECH RISC microcontroller chip
(XE88LC05) on the board. The Ping Pong Test (Default or User) is automatically started after the
power up if no PC is attached to the board’s RS232 connector and if the option has not been disabled
from the PC-GUI Software.
Rev1.1
If the PC is attached to the processor board, the embedded microcontroller software will monitor
the RS232 port for a valid user request from the PC GUI software. Acceptance and execution of
a request is indicated by the “blinking” of both yellow LEDs Rx and Tx together.
If the PC is not attached, the SX1211SK will assume “SX1211 Evaluation” mode if the user has
disabled the Ping-Pong Test, otherwise the “embedded software” will check if the user has
defined a “User Ping-Pong Test” if not the microcontroller will assume the “Default Ping-Pong
Test”.
SX1211SK – FUNCTIONAL FLOW CHART
DEFAULT PING-PONG TEST
Purpose
Ping Pong
Default
Test
Yes
Figure 4.1: “Embedded software” general flow chart
Ping Pong
Ping Pong
Ping Pong
Enabled ?
Enabled ?
Default
Test
User
Test
Yes
No
No
No
13 of 30
No
SX1211SK868/915 User Guide
Evaluation
Power ON
Power
OFF ?
Stand-
Alone
attached
PC
?
Yes
command
Perform
PC GUI
www.semtech.com