CC2560A_16 Datasheet, PDF (25/51 Pages) Texas Instruments – Dual-Mode Bluetooth Controller

www.ti.com
CC2560A NRND; CC2564 NRND
CC2560A, CC2560B, CC2564, CC2564B
SWRS121E – JULY 2012 – REVISED JANUARY 2016
6.4.1.1 Receiver
The receiver uses near-zero-IF architecture to convert the RF signal to baseband data. The signal
received from the external antenna is input to a single-ended low-noise amplifier (LNA) and passed to a
mixer that downconverts the signal to IF, followed by a filter and amplifier. The signal is then quantized by
a sigma-delta analog-to-digital converter (ADC) and further processed to reduce the interference level.
The demodulator digitally downconverts the signal to zero-IF and recovers the data stream using an
adaptive-decision mechanism. The demodulator includes EDR processing with:
• State-of-the-art performance
• A maximum-likelihood sequence estimator (MLSE) to improve the performance of basic-rate GFSK
sensitivity
• Adaptive equalization to enhance EDR modulation
New features include:
• LNA input range narrowed to increase blocking performance
• Active spur cancellation to increase robustness to spurs
6.4.1.2 Transmitter
The transmitter is an all-digital, sigma-delta phase-locked loop (ADPLL) based with a digitally controlled
oscillator (DCO) at 2.4 GHz as the RF frequency clock. The transmitter directly modulates the digital PLL.
The power amplifier is also digitally controlled. The transmitter uses the polar-modulation technique. While
the phase-modulated control word is fed to the ADPLL, the amplitude-modulated controlled word is fed to
the class-E amplifier to generate a Bluetooth standard-compliant RF signal.
New features include:
• Improved TX output power
• LMS algorithm to improve the differential error vector magnitude (DEVM)
6.4.2 Host Controller Interface
The CC256x device incorporates one UART module dedicated to the HCI transport layer. The HCI
interface transports commands, events, and ACL between the device and the host using HCI data
packets.
All members of the CC256x family supand port the H4 protocol (4-wire UART) with hardware flow control.
The CC2560B and CC2564B devices also support the H5 protocol (3-wire UART) with software flow
control. The CC256x device automatically detects the protocol when it receives the first command.
The maximum baud rate of the UART module is 4 Mbps; however, the default baud rate after power up is
set to 115.2 kbps. The baud rate can thereafter be changed with a VS command. The device responds
with a command complete event (still at 115.2 kbps), after which the baud rate change occurs.
The UART module includes the following features:
• Receiver detection of break, idle, framing, FIFO overflow, and parity error conditions
• Transmitter underflow detection
• CTS and RTS hardware flow control (H4 protocol)
• XON and XOFF software flow control (H5 protocol)
Table 6-2 lists the UART module default settings.
Table 6-2. UART Module Default Settings
PARAMETER
Bit rate
Data length
VALUE
115.2 kbps
8 bits
Copyright © 2012–2016, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links: CC2560A CC2560B CC2564 CC2564B
Detailed Description
25