BCM4330 Preliminary Data Sheet
Signal Assignments
Muxed Bluetooth GPIO Signals
The Bluetooth GPIO pins (BT_GPIO_0 to BT_GPIO_7) are multiplexed pins and can be programmed to be used
2
as GPIOs or for other Bluetooth interface signals such as I S. 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 (i.e. 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
2
the BCM4330 PCM and I S interface pins.
Table 21: GPIO Multiplexing Matrix
Pad Function Control Register Setting
Pin Name
0
1
2
3
4
5
6
7
BT_UART_CTS_N
BT_UART_RTS_N
BT_UART_RXD
BT_UART_TXD
BT_PCM_IN
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]
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
A_GPIO[1]
A_GPIO[0]
GPIO[5]
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
GPIO[4]
PCM_IN
PCM_OUT
PCM_IN
HCLK
–
–
I2S_SSDI/MSDI
I2S_SSDO
I2S_SWS
BT_PCM_OUT
BT_PCM_SYNC
BT_PCM_CLK
BT_I2S_DO
PCM_OUT LINK_IND
–
I2S_MSDO
I2S_MWS
I2S_MSCK
I2S_MSDO
–
PCM_SYNC PCM_SYNC HCLK
INT_LPO
–
PCM_CLK
PCM_OUT
PCM_IN
PCM_CLK
–
I2S_SSCK
STATUS
–
–
–
I2S_SSDO
BT_2S_DI
HCLK
I2S_SSDI/
MSDI
TX_CON_FX
BT_I2S_WS
BT_I2S_CLK
BT_GPIO_5
BT_GPIO_4
BT_GPIO_3
BT_GPIO_2
GPIO[7]
GPIO[6]
GPIO[5]
GPIO[4]
GPIO[3]
GPIO[2]
PCM_SYNC
PCM_CLK
HCLK
–
–
–
–
–
–
LINK_IND
–
–
I2S_MWS
–
–
–
–
–
–
I2S_SWS
INT_LPO
I2S_SSCK
I2S_SSDO
I2S_SWS
I2S_MSCK
I2S_SSCK
I2S_MSCK
I2S_MSDO
I2S_MWS
–
–
–
–
–
CLK_REQ
LINK_IND
–
–
–
–
–
I2S_SSDI/
MSDI
BT_GPIO_1
GPIO[1]
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
BT_GPIO_0
GPIO[0]
clk_12p288
RF_ACTIVE
A_GPIO[4]
A_GPIO[7]
BT_CLK_REQ_IN
A_GPIO[4]
–
–
BT_CLK_REQ_OUT WL/BT_CLK_REQ
®
BROADCOM
BCM4330 Preliminary Data Sheet
April 28, 2011 • 4330-DS304-RI
Page 113
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