BCM43362KUBGT Datasheet, PDF (34/84 Pages) Cypress Semiconductor – Single-Chip IEEE 802.11™ b/g/n MAC/Baseband/Radio + SDIO

BCM43362 Data Sheet
External Coexistence Interface
External Coexistence Interface
To manage wireless medium sharing for optimal performance, an external coexistence interface is provided that
enables signaling between the BCM43362 and one or two external collocated wireless devices such as
Bluetooth and/or WiMax. Note that three of the External Coexistence Interface pins are multiplexed with GPIOs.
By default, the pins are BT_COEX pins. Through software they can be changed to GPIOs. The fourth BT_COEX
signal is also multiplexed with a GPIO, but this one is a GPIO by default and can be changed via software to be
BTCX_FREQ. See “Pinout and Signal Descriptions” on page 47 for more details.
The signals in Table 7 can be enabled by software.
Signal
BTCX_STATUS
BTCX_RF_ACTIVE
BTCX_FREQ
BTCX_TXCONF
Table 7: Coexistence Signals
Description
Coexistence signal indicating Bluetooth priority status and TX/RX direction.
Coexistence signal indicating that Bluetooth is active.
Indicates that the coexisting Bluetooth is about to transmit on a restricted
channel.
Coexistence output giving Bluetooth permission to transmit.
Figure 16: 4-Wire Coexistence Wiring
BTCX_RF_ACTIVE
BTCX_STATUS
BTCX_TXCONF
BTCX_FREQ
RF_active
status
txconf
Priority 2
BCM43362
R* R*
R
R*
COEX_OUT_0
COEX_OUT_1
COEX_IN
C_GPIO_1
Coexisting
Device
* Note: The pull-down is only required if the coexisting
device has the potential to float the signal.
Broadcom_®
February 13, 2015 • 43362-DS106-R
IEEE 802.11 b/g/n MAC/Baseband/Radio + SDIO
Page 33
BROADCOM CONFIDENTIAL