BCM20707 Datasheet, PDF (20/65 Pages) Cypress Semiconductor – Complies with Bluetooth Core Specification version 4.2 including BR/EDR/BLE

BCM20707 Preliminary Data Sheet
Peripheral Transport Unit
Baud Rate (bps)
6M
4M
3M
2M
1.5M
1M
921600
230400
115200
57600
38400
Table 2: Common Baud Rate Examples, 48 MHz Clock
High Rate
0xFF
0xFF
0x0
0x44
0x0
0x0
0x22
0x0
0x1
0x1
0x11
Low Rate
0xF8
0xF4
0xFF
0xFF
0xFE
0xFD
0xFD
0xF3
0xE6
0xCC
0xB2
Mode
High rate
High rate
Normal
Normal
Normal
Normal
Normal
Normal
Normal
Normal
Normal
Error (%)
0
0
0
0
0
0
0.16
0.16
–0.08
0.04
0
Normally, the UART baud rate is set by a configuration record downloaded after reset. Support for changing the
baud rate during normal HCI UART operation is included through a vendor-specific command that allows the
host to adjust the contents of the baud rate registers.
The BCM20707 UART operates correctly with the host UART as long as the combined baud rate error of the
two devices is within ±2%.
Peripheral UART Interface
The BCM20707 has a second UART that may be used to interface to other peripherals. This peripheral UART
is accessed through the optional I/O ports, which can be configured individually and separately for each
functional pin as shown in Table 3.
Table 3: BCM20707 Peripheral UART
Pin Name
Configured pin name
pUART_TX
P0
P31
pUART_RX
P2
P33
pUART_CTS_N
P3
–
pUART_RTS_N
P6
P30
Note: Not all of the GPIOs above are available on the 36-pin WLBGA package.
Broadcom^®
May 27, 2016 • 20707-DS206-R
BROADCOM CONFIDENTIAL
Bluetooth SoC
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