BCM88335 Datasheet, PDF (84/140 Pages) Cypress Semiconductor – Single-Chip 5G Wi-Fi IEEE 802.11ac MAC/Baseband/ Radio with Integrated Bluetooth 4.1 for Automotive Applications

BCM88335 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 19 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_1 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 BCM88335's PCM and I²S interface pins.
Table 19: GPIO Multiplexing Matrix
Pin Name 0
1
BT_UART_CTS_ UART_CTS_N –
N
BT_UART_RTS_ UART_RTS_N –
N
BT_UART_RXD UART_RXD –
BT_UART_TXD UART_TXD –
BT_PCM_IN
A_GPIO[3] PCM_IN
Pad Function Control Register Setting
2
3
4
5
6
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
PCM_IN HCLK
–
–
–
–
–
–
–
BT_PCM_OUT A_GPIO[2]
BT_PCM_SYNC A_GPIO[1]
BT_PCM_CLK A_GPIO[0]
PCM_OUT
PCM_SYNC
PCM_CLK
PCM_OUT
PCM_SYN
C
PCM_CLK
LINK_IND
HCLK
–
–
INT_LPO
–
I2S_MSDO –
I2S_MWS –
I2S_MSCK –
BT_I2S_DO
BT_I2S_DI
BT_I2S_WS
BT_I2S_CLK
BT_GPIO_1
BT_GPIO_0
CLK_REQ
A_GPIO[5]
A_GPIO[6]
PCM_OUT –
PCM_IN
–
GPIO[7]
PCM_SYNC –
GPIO[6]
PCM_CLK –
GPIO[1]
–
–
GPIO[0]
–
–
WL/
–
–
BT_CLK_REQ
–
HCLK
LINK_IND
–
–
–
–
I2S_SSDO I2S_MSDO –
I2S_SSDI/ –
–
MSDI
–
I2S_MWS –
INT_LPO I2S_MSCK –
–
–
–
clk_12p288 –
–
–
–
–
7
15
A_GPIO[1] –
A_GPIO[0] –
GPIO[5]
–
GPIO[4]
–
I2S_SSDI/ SF_MISO
MSDI
I2S_SSDO SF_MOSI
I2S_SWS
SF_SPI_CS
N
I2S_SSCK SF_SPI_CL
K
STATUS
–
TX_CON_FX –
I2S_SWS –
I2S_SSCK –
CLASS1[2] –
–
–
A_GPIO[7] –
Broadcom^®
September 23, 2015 • 88335-DS100-R
BROADCOM CONFIDENTIAL
Page 83