ETRX357HR-LR Telegesis Ltd, ETRX357HR-LR Datasheet - Page 11

• Manufacturer Part Number: ETRX357HR-LR
• Description: MODULE ZIGBEE W/PA LNA U.FL
• Manufacturer: Telegesis Ltd

Specifications of ETRX357HR-LR

• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: ISM
• Power - Output: 18dBm
• Sensitivity: -105dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 28mA
• Current - Transmitting: 106mA
• Data Interface: PCB, Surface Mount
• Memory Size: 192kB 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
• Other names: 920-1008-2

4 Hardware Description
The ETRX351 and ETRX357 are based on the Ember EM351 and EM357 respectively. The
EM351 and EM357 are fully integrated 2.4GHz ZigBee transceivers with a 32-bit ARM
M3
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
maintaining 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 allowing this 3
generation 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 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 Commandset please refer to the AT Commandset manual for this
information and when developing custom firmware please refer to the EM35x datasheet.
©2009 Telegesis (UK) Ltd
TM
integrated
antenna
U.FL socket
microprocessor, flash and RAM memory, and peripherals.
filtering and
selection,
matching
terminal
circuitry
rf
rd
Vreg
generation module to offer a longer battery life than any 2
BALUN
Figure 2: Hardware Diagram
1,8Vdc
Vcc
1V8
1V25
LDO
LDO
24MHz
- 11 -
EM35x
ETRX35x Preliminary Product Manual
ETRX351 AND ETRX357
UART
5
RESET
I/O
A/D
JTAG
programming
RESET
I / O
®
Cortex
nd