ETRX357HR-LRS Telegesis Ltd, ETRX357HR-LRS Datasheet - Page 12

• Manufacturer Part Number: ETRX357HR-LRS
• Description: MODULE, ZIGBEE, ETRX3, PA+LNA, HIROS
• Manufacturer: Telegesis Ltd
• Series: -r

Specifications of ETRX357HR-LRS

• Rohs Compliant: YES
• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: General Purpose
• Power - Output: 20dBm (100mW)
• Sensitivity: -106dBm
• Voltage - Supply: 2.1V ~ 3.6V
• Current - Receiving: 33mA
• Current - Transmitting: 140mA
• Data Interface: Solder Pad
• Memory Size: 128kB Flash, 12kB RAM
• Antenna Connector: U.FL
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4 Hardware Description
The ETRX351-LRS and ETRX357-LRS are based on the Ember EM351 and EM357 respectively
in addition to a frontend module containing a PA, LNA and RF switch in addition to the RF-
Frontend. The EM351 and EM357 are fully integrated 2.4GHz ZigBee transceivers with a 32-bit
ARM
The industry standard serial wire and JTAG programming and debugging interfaces together with
the standard ARM system debug components help to streamline any custom software
development.
In addition to this a number of MAC functions are also implemented in hardware to help maintain
the strict timing requirements imposed by the ZigBee and IEEE802.15.4 standards.
The new advanced power management features allow faster wakeup from sleep and new power-
down modes allow this 3
modules on the market.
The EM35x has fully integrated voltage regulators for both required 1.8V and 1.25V supply
voltages. The voltages are monitored (brown-out detection) and the built in power-on-reset circuit
eliminates the need for any external monitoring circuitry. A 32.768kHz watch crystal can be
connected externally to pads 3 and 4 in case more accurate timing is required.
4.1 Hardware Interface
All GPIO pins of the EM351 or EM357 except PB0 and PC5 are accessible on the module‟s pads.
Whether signals are used as general purpose I/Os, or assigned to a peripheral function like ADC is
set by the firmware. When using the Telegesis AT Command-set please refer to the AT Command-
set manual for this information and when developing custom firmware please refer to the EM35x
datasheet.
©2011 Telegesis (UK) Ltd
integrated
antenna
®
U.FL socket
Cortex M3
selection,
terminal
filtering and
matching
circuitry
rf
TM
microprocessor, flash and RAM memory, and peripherals.
rd
generation module to offer a longer battery life than any 2
FEM
Vreg
Match
Match
Figure 2: Hardware Diagram
1,8Vdc
Vcc
1V8
1V25
LDO
LDO
24MHz
- 12 -
EM35x
ETRX351-LRS and ETRX357-LRS
ETRX35x-LRS Product Manual
UART
5
RESET
I/O
A/D
JTAG
programming
nd
RESET
I / O
generation