BCM20730 Datasheet, PDF (30/62 Pages) Cypress Semiconductor – Single-Chip Bluetooth Transceiver for Wireless Input Devices

BCM20730 Data Sheet
Power Management Unit
Host Controller Power Management
Power is automatically managed by the firmware based on input device activity. As a power-saving task, the
firmware controls the disabling of the on-chip regulator when in deep Sleep mode.
BBC Power Management
There are several low-power operations for the BBC:
• Physical layer packet handling turns RF on and off dynamically within packet TX and RX.
• Bluetooth-specified low-power connection sniff mode. While in these low-power connection modes, the
BCM20730 runs on the Low Power Oscillator and wakes up after a predefined time period.
The BCM20730 automatically adjusts its power dissipation based on user activity. The following power modes
are supported:
• Active mode
• Idle mode
• Sleep mode
• HIDOFF mode
The BCM20730 transitions to the next lower state after a programmable period of user inactivity. Busy mode
is immediately entered when user activity resumes.
In HIDOFF mode, the BCM20730 baseband and core are powered off by disabling power to LDOOUT. The VDDO
domain remains powered up and will turn the remainder of the chip on when it detects user events. This mode
minimizes chip power consumption and is intended for long periods of inactivity.
BROADCOM ®
September 9, 2013 • 20730-DS108-R
BROADCOM CONFIDENTIAL
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