Block Diagram And Descriptions - Laird BT85 Series User Manual

BT85x Series
Datasheet
3 B D
LOCK IAGRAM AND
Figure 1: BT850 module block diagram
CYW20704A2 The BT85x is based on CYW20704A2 dual mode chip. The chip is a single-chip radio with on-
(Main chip) chip LDO regulators and baseband IC for Bluetooth 2.4 GHz systems including EDR to 3 Mbps.
Dedicated signal and baseband processing is included for full Bluetooth operation. The chip
provides I2S/PCM and USB interfaces. There are two general purpose I/Os be configured for
proprietary of Cypress GCI used and a general purpose I/O can be configured for
scan/inquire/paging/data traffic of indicator. These three I/O pins are controlled by
Antenna
BT850-ST – Trace Pad provision for use with a range of certified External Antennas
Band Pass The band pass filter filters the out-of-band emissions from the transmitter to meet the
Filter
EEPROM
There are 512 k bits EEPROM embedded on the BT85x which can be used to store
parameters, such as BD_ADDR, USB enumeration information, maximum TX power, PCM
configuration, USB product ID, USB vendor ID, and USB product description. With that, the
Crystal The embedded 40 MHz crystal is used for generating the clock for the entire module.
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/bluetooth
D
ESCRIPTIONS
BT850-SA & BT851 – The antenna is a ceramic monopole chip antenna.
specific regulations for type approvals of various countries.
BT850 module can support UHE/HCI Proxy mode.
5
© Copyright 2017 Laird. All Rights Reserved
firmware.
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610