BCM20713A1KUBXGT Datasheet, PDF (34/65 Pages) Cypress Semiconductor – Single-Chip Bluetooth Transceiver and Baseband Processor

BCM20713 Preliminary Data Sheet
Frequency Selection
As mentioned earlier, the TM0 lead controls the polarity of the CLK_REQ output on GPIO_5. However, it
assumes that GPIO_6 input polarity is already consistent with the desired polarity on GPIO_5/CLK_REQ.
Therefore, when TM0 is 1 for an active high output, the function is a simple OR between the external GPIO_6
and the internal clock request state. However, when TM0 is 0 for an active low output, the logic inverts the
internal clock request signal and performs an AND between it and the GPIO_6 input. Even though it is using an
OR gate, it still provides a logical AND on the two clock request states.
Since the logic assumes that it is also active low (similar to GPIO_5 output), it does not invert the GPIO_6 input
first. Table 4 on page 33 shows the truth table.
GPIO_6
CLK_REQ_IN
0
0
1
1
0
0
1
1
Table 4: Truth Table
Internal Clock Request State TM0
(0 = sleep)
(0 = active low output)
0
0
1
0
0
0
1
0
0
1
1
1
0
1
1
1
GPIO_5
CLK_REQ
0
0
1
0
0
1
1
1
Package Options and TCXO Mode
Only a few package options bring out TM0 to balls, allowing the application to configure them. In most packages,
these pins are already configured.
Table 5 lists available package options.
Part Number
BCM20713A1KUFBXG
BCM20713A1KUBG
Table 5: Package Options
Package Description
50-ball FPBGA
42-bump WLBGA
TM0
Brought to ball
1
Frequency Selection
Any frequency within the range specified for the crystal and TCXO reference can be used. These frequencies
include standard handset reference frequencies (12, 13, 14.4, 15.36, 16.2, 16.8, 18, 19.2, 19.44, 19.68, 19.8,
20, 24, 26, 33.6, 37.4, and 38.4 MHz) and any frequency between these reference frequencies, as desired by
the system designer. Since bit timing is derived from the reference frequency, the BCM20713 must have the
reference frequency set correctly in order for the UART and PCM interfaces to function properly.
Broadcom^®
December 21, 2015 • 20713-DS102-R
Single-Chip Bluetooth Transceiver and Baseband Processor
Page 33
BROADCOM CONFIDENTIAL