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PDF CYW20704 Data sheet ( Hoja de datos )
| Número de pieza | CYW20704 | |
| Descripción | Single-Chip Bluetooth Transceiver and Baseband Processor | |
| Fabricantes | Cypress Semiconductor | |
| Logotipo |  |
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CYW20704
Single-Chip Bluetooth Transceiver
and Baseband Processor
The Cypress CYW20704 is a monolithic, single-chip, Bluetooth 4.1+ HS-compliant, stand-alone baseband processor with an
integrated 2.4 GHz transceiver. Manufactured using the industry's most advanced 40 nm CMOS low-power process, the CYW20704
employs the highest level of integration, eliminating all critical external components, and thereby minimizing the device’s footprint and
costs associated with the implementation of Bluetooth solutions.
The CYW20704 is the optimal solution for voice and data applications that require a Bluetooth SIG standard Host Controller Interface
(HCI) via USB, UART H4, and PCM audio interface support.
The CYW20704 transceiver’s enhanced radio performance meets the most stringent industrial temperature application requirements
for compact integration into mobile handset and portable devices. The CYW20704 provides full radio compatibility, enabling it to
operate simultaneously with GPS and cellular radios.
Cypress Numbering Scheme
Cypress is converting the acquired IoT part numbers from Broadcom to the Cypress part numbering scheme. Due to this conversion,
there is no change in form, fit, or function as a result of offering the device with Cypress part number marking. The table provides
Cypress ordering part number that matches an existing IoT part number.
Table 1. Mapping Table for Part Number between Broadcom and Cypress
Broadcom Part Number
BCM20704
BCM20704UA2KFFB1G
Features
Cypress Part Number
CYW20704
CYW20704UA2KFFB1G
■ Complies with Bluetooth Core Specification Version 4.1+ HS
with provisions for supporting future specifications
■ Bluetooth Class 1 or Class 2 transmitter operation
■ Supports extended synchronous connections (eSCO), for
enhanced voice quality by allowing for retransmission of
dropped packets
■ Adaptive frequency hopping (AFH) for reducing radio
frequency interference
■ Interface support, host controller interface (HCI) using a USB
or high-speed UART interface and PCM for audio data
■ USB2.0 full-speed with LPM support (12 Mbps)
■ Supports Cypress proprietary 2 Mbps low energy mode.
■ Ultra-low power consumption
■ Supports serial flash interfaces
■ Supports mobile and PC applications without external memory
■ Available in a 49-ball FcBGA package
IoT Applications
■ Remotes: TV/Entertainment
■ USB dongles
■ Wearables
■ Smart metering
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 002-14786 Rev. *E
• San Jose, CA 95134-1709 • 408-943-2600
Revised Thursday, September 29, 2016
1 page  
CYW20704
■ Full support for power savings modes:
❐ Bluetooth standard sniff
❐ Deep sleep modes and regulator shutdown
■ Built-in LPO clock
■ Larger patch RAM space to support future enhancements
■ Serial flash Interface with native support for devices from several manufacturers
■ One-Time Programmable (OTP) memory
1.3 Block Diagram
Figure 2 shows the interconnect of the major CYW20704 physical blocks and associated external interfaces.
Figure 2. Functional Block Diagram
Document Number: 002-14786 Rev. *E
Page 5 of 49
5 Page 
CYW20704
There are two mechanisms for the device and the host to signal wake status to each other:
USB
Bluetooth device WAKE (BT_DEV_WAKE) and
Host WAKE (and BT_HOST_WAKE) signaling
When running in USB mode with LPM, the device supports the USB version 2.0
full-speed specification, suspend/resume signaling, as well as remote wake-up
signaling for power control.
The BT_DEV_WAKE signal allows the host to wake the BT device, and
BT_HOST_WAKE is an output that allows the BT device to wake the host.
Table 2. Power Control Pin Summary
Pin
BT_DEV_WAKE
(BT_GPIO_0)
BT_HOST_WAKE
(BT_GPIO_1)
BT_CLK_REQ
RST_N
Direction
Host output
BT input
BT output
Host input
BT output
BT input
Description
Bluetooth device wake-up: Signal from the host to the Bluetooth device that the host
requires attention.
■Asserted = Bluetooth device must wake up or remain awake.
■Deasserted = Bluetooth device may sleep when sleep criteria are met.
The polarity of this signal is software configurable and can be asserted high or low. By
default, BT_DEV_WAKE is active-low (if BT-WAKE is low it requires the device to wake up
or remain awake).
For USB applications, this pin can be used to disable the BT radio, which puts the device
in Airport mode.
Host wake-up. Signal from the Bluetooth device to the host indicating that Bluetooth device
requires attention.
■Asserted = Host device must wake up or remain awake.
■Deasserted = Host device may sleep when sleep criteria are met.
The polarity of this signal is software configurable and can be asserted high or low.
Clock request
■Asserted = External clock reference required
■Deasserted = External clock reference may be powered down
Used to place the chip in reset. RST_N is active-low.
3.6.3 Bluetooth Baseband Core Power Management
The following are low-power operations for the Bluetooth Baseband Core (BBC):
■ Physical layer packet-handling turns the RF on and off dynamically within transmit/receive packets.
■ Bluetooth-specified low-power connection modes: sniff, hold, and park. While in these modes, the CYW20704 runs on the low-power
oscillator and wakes up after a predefined time period.
3.7 Adaptive Frequency Hopping
The CYW20704 supports host channel classification and dynamic channel classification Adaptive Frequency Hopping (AFH)
schemes, as defined in the Bluetooth specification.
Host channel classification enables the host to set a predefined hopping map for the device to follow.
If dynamic channel classification is enabled, the device gathers link quality statistics on a channel-by-channel basis to facilitate chan-
nel assessment and channel map selection. To provide a more accurate frequency hop map, link quality is determined using both RF
and baseband signal processing.
Document Number: 002-14786 Rev. *E
Page 11 of 49
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CYW20704.PDF ] | |
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