User's Manual
Table Of Contents
- 2035-UM1xx.book
- Table of Contents
- List of Figures
- List of Tables
- Section 1: Introduction
- Section 2: Hardware System Overview
- Section 3: BCM2035 Usage Models
- Section 4: Hardware Configuration
- Section 5: Software Configuration
- Introduction
- Hardware Power-Up Sequence
- Boot ROM Power-Up Sequence
- Firmware Power-Up Sequence
- BCM2035 Mini-Drivers
- Loading Mini-Drivers from USB
- Load Mini-Drivers From UART
- SCO Configuration
- Frequency Trimming
- UART Sleep Mode Operation
- Section 6: Configuration Data File System
- Section 7: Vendor-Specific HCI Command Reference
- Section 8: ASCII Hex File Download Protocol
- Section 9: ASCII HEX File Format
- Section 10: Configuration Data Download Protocol
- Section 11: Configuration Data Image Format
- Section 12: UART Start-up Sequence
- Section 13: USB Start-up Sequence
9/29/2004 OV4F2
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BCM2035 User Manual
04/23/03
Broadcom Corporation
Page 6 BCM2035 Radio Transceiver Document 2035-UM100-R
BCM2035 RADIO TRANSCEIVER
The
BCM2035 has an integrated radio transceiver that has been optimized for use in 2.4 GHz Bluetooth
wireless systems. It has been designed to provide low-power, low-cost, robust communications for applications
operating in the globally available 2.4 GHz unlicensed ISM band. It is fully compliant with the Bluetooth Radio
Specification v1.1 and meets or exceeds the requirements to provide the highest communication link quality
of service.
MODULATOR AND DEMODULATOR (MODEM)
The
BCM2035 Modem interfaces with the BBC and prepares the serial data from the baseband suitable for
transmitting. The main functions of the modem block include digital modulation, digital demodulation, bit
synchronization and calibration and control.
Digital Modulator
The Digital Modulator performs the data modulation and Gaussian filtering required for the GFSK signal. The
fully-digital modulator minimizes any frequency drift or anomalies in the modulation characteristics of the
transmitted signal and is much more stable than direct VCO modulation schemes.
Digital Demodulator and Bit Synchronizer
The Digital Demodulator and Bit Synchronizer takes the low IF received signal and performs an optimal
frequency tracking and bit synchronization algorithm.
Calibration and Control
The calibration and control section provides the radio timing, command, and control functions. These have
been optimized for power savings.
The
BCM2035 radio transceiver features an automated calibration scheme that is fully self-contained in the
radio and is fully automated. No user interaction is required during normal operation or during manufacturing
to provide the optimal performance. Calibration optimizes the performance of all the major blocks within the
radio to within 2% of optimal conditions, including gain and phase characteristics of filters, matching between
key components, and key gain blocks. This takes into account process variation and temperature variation.
Calibration occurs transparently during normal operation during the settling time of the hops and calibrates for
temperature variations as the device cools and heats during normal operation in its environment.