User's Manual

XXXXXXXX Rev X
LA-5127 CF card Integration Guide
Copyright 2004 Symbol Technologies, Inc. Page 11 of 37
Confidential Material – Disclosure Strictly Prohibited.
The baseband and MAC chip contains an ARM946E processor core and the
SRAM required for implementing the Media Access Control (MAC) functionality.
The embedded firmware runs the 802.11 MAC layer control. The MAC control
sends and receives packets and transfers data to and from the CF interface to
the host computer of the handheld device.
3.4 Frequency Generation
The MAC & Baseband chip has the voltage-controlled oscillator (VCO) required
for the design. The VCO operates in one of the two ranges: 9648 to 9936MHz
(4X channel frequency for low-band) or 9900 to 11,800MHz (2X channel
frequency for high band). The Synthesizer circuit uses the 40MHz crystal
oscillator to phase lock the VCO to produce accurate channel frequency for the
radio. The frequency range in the low-band is covered in two MHz steps (1MHz
at the channel frequency) and in the high-band the LO frequency is covered in
five MHz steps (2.5MHz at the channel frequency).
4. RF Signal Performance
4.1 Specifications
Unless otherwise stated the following specifications hold over 0C to +55C,
and 3.3V +/- 5%. This environment is defined as the specific temperature
envelope containing the LA-5127 radio product. If embedded within a host
product, this envelope is the internal ambient temperature of the host under
the hosts operating conditions.
Description Typ Max Unit Comments
Functional
Continuous Transmit Current
(OFDM 54Mbps)
481 580 mA
Continuous Transmit Current
(CCK/DS 11Mbps)
501 600 mA
Continuous Receive Current
(OFDM 54Mbps)
281 340 mA
Continuous Receive Current
(CCK/DS 11Mbps)
281 340 mA
Continuous Ping (10,000 size) TX
54Mbps
328 390 mA
Continuous Ping (10,000 size) RX
54Mbps
304 370 mA
Max in-rush current 165 200 mA
Supply Voltage
3.13 3.47 Volts