BCM20713A1KUBXGT Datasheet, PDF (19/65 Pages) Cypress Semiconductor – Single-Chip Bluetooth Transceiver and Baseband Processor

BCM20713 Preliminary Data Sheet
Power Management Unit
• Fixed frequency constant bit stream transmission
– Unmodulated, 8-bit fixed pattern, PRBS-9, or PRBS-15
– Enables modulated signal measurements with standard RF test equipment
• Packetized connectionless transmitter test
– Hopping or fixed frequency
– Multiple packet types supported
– Multiple data patterns supported
• Packetized connectionless receiver test
– Fixed frequency
– Multiple packet types supported
– Multiple data patterns supported
Power Management Unit
The Power Management Unit (PMU) provides power management features that can be invoked through power
management registers or packet handling in the baseband core. This section contains descriptions of the PMU
features.
RF Power Management
The BBC generates power-down control signals for the transmit path, receive path, PLL, and power amplifier to
the 2.4 GHz transceiver. The transceiver then processes the power-down functions, accordingly.
Host Controller Power Management
The host can place the device in a sleep state, in which all nonessential blocks are powered off and all
nonessential clocks are disabled. Power to the digital core is maintained so that the state of the registers and
RAM is not lost. In addition, the LPO clock is applied to the internal sleep controller so that the chip can wake
automatically at a specified time or based on signaling from the host. The goal is to limit the current consumption
to a minimum, while maintaining the ability to wake up and resume a connection with minimal latency.
If a scan or sniff session is enabled while the device is in Sleep mode, the device automatically will wake up for
the scan/sniff event, then go back to sleep when the event is done. In this case, the device uses its internal LPO-
based timers to trigger the periodic wake up. While in Sleep mode, the transports are idle. However, the host
can signal the device to wake up at any time. If signaled to wake up while a scan or sniff session is in progress,
the session continues but the device will not sleep between scan/sniff events. Once Sleep mode is enabled, the
wake signaling mechanism can also be thought of as a sleep signaling mechanism, since removing the wake
status will often cause the device to sleep.
In addition to a Bluetooth device wake signaling mechanism, there is a host wake signaling mechanism. This
feature provides a way for the Bluetooth device to wake up a host that is in a reduced power state.
There are two mechanisms for the device and the host to signal wake status to each other:
Broadcom^®
December 21, 2015 • 20713-DS102-R
Single-Chip Bluetooth Transceiver and Baseband Processor
Page 18
BROADCOM CONFIDENTIAL