BCM4354KKWBGT Datasheet, PDF (68/192 Pages) Cypress Semiconductor – Single-Chip 5G Wi-Fi IEEE 802.11ac 2×2 MAC/ Baseband/Radio with Integrated Bluetooth 4.1 and FM Receiver

BCM4354 Data Sheet
External Coexistence Interface
External Coexistence Interface
An external handshake interface is available to enable signaling between the device and an external co-located
wireless device, such as GPS, or LTE, to manage wireless medium sharing for optimal performance.
Figure 24 and Figure 25 on page 67 show the LTE coexistence interface (including UART) for each BCM4354
package type. See Table 26: “GPIO Alternative Signal Functions,” on page 120 for further details on multiplexed
signals, such as the GPIO pins.
See Table 15: “UART Timing Specifications,” on page 57 for the UART baud rate.
Figure 24: Broadcom GCI Mode LTE Coexistence Interface
WLAN
GCI
SECI_OUT
SECI_IN
UART_IN
UART_OUT
BTFM
BCM4354
LTE/IC
Notes:
 OR’ing to generate ISM_RX_PRIORITY for ERCX_TXCONF or BT_RX_PRIORITY is achieved by
setting the GPIO mask registers appropriately.
 SECI_OUT and SECI_IN are multiplexed on the GPIOs.
Figure 25: Legacy 3-Wire LTE Coexistence Interface
WLAN
GCI_GPIO_2
GCI_GPIO_1
GCI
GCI_GPIO_0
WCN_PRIORITY
MWS_RX, LTE_PRIORITY
LTE_FRAME_SYNC
BT/FM
BCM4354
LTE/IC
Note: OR’ing to generate WCN_PRIORITY FOR ERCX_TXCONF or BT_RX_PRIORITY is achieved by
setting the GPIO mask registers appropriately.
Broadcom^®
October 15, 2014 • 4354-DS109-R
BROADCOM CONFIDENTIAL
Page 67