BCM20704 datasheet(21/49 Pages) CYPRESS

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Document Number: 002-14786 Rev. *E

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CYW20704

7. Pin-out and Signal Descriptions

7.1 Pin Descriptions

Table 8. CYW20704 FcBGA Signal Descriptions

Signal

FcBGA Pin

(49-Ball)

I/O

Power Domain

Description

Radio

RFOP

I/O

VDD_RF

RF I/O antenna port

XO_IN

VDD_RF

Crystal or reference input

XO_OUT

VDD_RF

Crystal oscillator output

Voltage Regulators

VBAT

N/A

VBAT input pin

VDD2P5_IN

N/A

2.5V LDO input

VDD2P5_OUT

N/A

2.5V LDO output

VDDC_OUT

N/A

1.2V LDO output

Straps

BT_XTAL_STRAP_1

VDDO

This pin is used as strap for choosing the XTAL

frequencies.

RST_N

VDDO

Active-low reset input

BT_TM1

VDDO

Reserved: connect to ground.

Digital I/O

BT_GPIO_0

VDDO

BT_GPIO_0/BT_DEV_WAKE

A signal from the host to the CYW20704 device that the

host requires attention.

BT_GPIO_1

VDDO

BT_GPIO_1/BT_HOST_WAKE

A signal from the CYW20704 device to the host

indicating that the Bluetooth device requires attention.

BT_GPIO_2

VDDO

When high, this signal extends the XTAL warm-up time

for external CLK requests. Otherwise, it is typically

connected to ground when a dedicated BT crystal is

used.

BT_GPIO_3

I/O

VDDO

General-purpose I/O.

BT_GPIO_4

I/O

VDDO

General-purpose I/O. It can also be configured as a GCI

pin.

BT_GPIO_5

I/O

VDDO

General-purpose I/O. It can also be configured as a GCI

pin.

BT_GPIO_6

I/O

VDDO

General-purpose I/O. It can also be configured as a GCI

pin.

BT_GPIO_7

I/O

VDDO

General-purpose I/O. It can also be configured as a GCI

pin.

BT_UART_RXD

I/O

VDDO

UART receive data

BT_UART_TXD

I/O

VDDO

UART transmit data

BT_UART_RTS_N

I/O

VDDO

UART request to send output

BT_UART_CTS_N

I/O

VDDO

UART clear to send input

BT_CLK_REQ

VDDO

This pin is used for shared-clock application.

SPI2_MISO_I2S_SCL

I/O

VDDO

BSC clock

SPI2_MOSI_I2S_SDA

I/O

VDDO

BSC data

SPI2_CLK

I/O

VDDO

Serial flash SPI clock

SPI2_CSN

I/O

VDDO

Serial flash active-low chip select

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