BCM43455XKUBGT Datasheet, PDF (93/159 Pages) Cypress Semiconductor – Single-Chip 5G WiFi IEEE 802.11ac MAC/Baseband/ Radio with Integrated Bluetooth 4.1 and FM Receiver

BCM43455 Preliminary Data Sheet
WLAN GPIO Signals and Strapping Options
Multiplexed Bluetooth GPIO Signals
The Bluetooth GPIO pins (BT_GPIO_0 to BT_GPIO_7) are multiplexed pins and can be programmed to be used as GPIOs or for other Bluetooth interface
signals such as I²S. The specific function for a given BT_GPIO_X pin is chosen by programming the Pad Function Control register for that specific pin.
Table 21 shows the possible options for each BT_GPIO_X pin. Note that each BT_GPIO_X pin's Pad Function Control register setting is independent
(BT_GPIO_5 can be set to pad function 7 at the same time that BT_GPIO_3 is set to pad function 0). When the Pad Function Control register is set to
0, the BT_GPIOs do not have specific functions assigned to them and behave as generic GPIOs. The A_GPIO_X pins described below are multiplexed
behind the BCM43455's PCM and I²S interface pins.
Pin Name
BT_UART_CTS_N
BT_UART_RTS_N
BT_UART_RXD
BT_UART_TXD
BT_PCM_IN
BT_PCM_OUT
BT_PCM_SYNC
BT_PCM_CLK
BT_I2S_DO
BT_I2S_DI
BT_I2S_WS
BT_I2S_CLK
BT_GPIO_5
BT_GPIO_4
BT_GPIO_3
BT_GPIO_2
BT_CLK_REQ
0
UART_CTS_N
UART_RTS_N
UART_RXD
UART_TXD
A_GPIO[3]
A_GPIO[2]
A_GPIO[1]
A_GPIO[0]
A_GPIO[5]
A_GPIO[6]
GPIO[7]
GPIO[6]
GPIO[5]
GPIO[4]
GPIO[3]
GPIO[2]
WL/BT_CLK_REQ
1
–
–
–
–
PCM_IN
PCM_OUT
PCM_SYNC
PCM_CLK
PCM_OUT
PCM_IN
PCM_SYNC
PCM_CLK
HCLK
LINK_IND
–
–
–
Table 21: GPIO Multiplexing Matrix
Pad Function Control Register Setting
2
–
–
–
–
PCM_IN
PCM_OUT
PCM_SYNC
PCM_CLK
–
–
–
–
–
–
–
–
–
3
–
–
–
–
HCLK
LINK_IND
HCLK
–
–
HCLK
LINK_IND
–
I2S_MSCK
I2S_MSDO
I2S_MWS
–
–
4
5
6
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
I2S_MSDO
–
–
I2S_MWS
–
–
I2S_MSCK
–
I2S_SSDO
I2S_MSDO
–
I2S_SSDI/MSDI –
–
–
I2S_MWS
–
INT_LPO
I2S_MSCK
–
I2S_SSCK
–
–
I2S_SSDO
–
–
I2S_SWS
–
–
I2S_SSDI/MSDI –
–
–
–
–
7
A_GPIO[1]
A_GPIO[0]
GPIO[5]
GPIO[4]
I2S_SSDI/MSDI
I2S_SSDO
I2S_SWS
I2S_SSCK
STATUS
TX_CON_FX
I2S_SWS
I2S_SSCK
CLK_REQ
–
–
–
A_GPIO[7]
15
–
–
–
–
SF_MISO
SF_MOSI
SF_SPI_CSN
SF_SPI_CLK
–
–
–
–
–
–
–
–
–
Broadcom^®
November 5, 2015 • 43455-DS109-R
BROADCOM CONFIDENTIAL
Page 92