BCM20706 Data Sheet
Clock Frequencies
Table 5 shows the recommended crystal specifications.
Table 5: Reference Crystal Electrical Specifications
Parameter
Conditions
Minimum Typical
20 24
Fundamental
Maximum Unit
Nominal frequency
Oscillation mode
–
40
MHz
–
–
Frequency tolerance
Tolerance stability over temp
Equivalent series resistance
Load capacitance
@25°C
–
±10
–
ppm
ppm
W
@0°C to +70°C
–
±10
–
–
–
–
–
–
–
–
–
–
60
–
–
12
–
pF
Operating temperature range
Storage temperature range
Drive level
0
+70
+125
200
±10
2
°C
–40
–
–
°C
–
μW
ppm/year
pF
Aging
–
–
Shunt capacitance
–
–
HID Peripheral Block
The peripheral blocks of the BCM20706 all run from a single 128 kHz low-power RC oscillator. The oscillator
can be turned on at the request of any of the peripherals. If the peripheral is not enabled, it shall not assert its
clock request line.
The keyboard scanner is a special case, in that it may drop its clock request line even when enabled, and then
reassert the clock request line if a keypress is detected.
Broadcom®
Bluetooth SoC
May 19, 2016 • 20706-DS202-R
Page 20
BROADCOM CONFIDENTIAL
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