BCM20713A1KUFBXG Datasheet, PDF (36/65 Pages) Cypress Semiconductor – Single-Chip Bluetooth Transceiver and Baseband Processor

BCM20713 Preliminary Data Sheet
LPO Clock Interface
LPO Clock Interface
The LPO clock is the second frequency reference that the BCM20713 uses to provide low-power mode timing
for park, hold, and sniff. The LPO clock can be provided to the device externally, from a 32.768 kHz source or
the BCM20713 can operate using the internal LPO clock.
The LPO can be internally driven from the main clock. However, sleep current will be impacted.
The accuracy of the internal LPO limits the maximum park, hold, and sniff intervals.
Table 6: External LPO Signal Requirements
Parameter
Nominal input frequency
Frequency accuracy
Input signal amplitude
Signal type
Input impedance (when power is applied or power is off)
External LPO Clock
32.768
±250
200 to 3600
Square-wave or sine-wave
>100
<5
Units
kHz
ppm
mVp-p
–
kΩ
pF
Broadcom^®
December 21, 2015 • 20713-DS102-R
Single-Chip Bluetooth Transceiver and Baseband Processor
Page 35
BROADCOM CONFIDENTIAL