BCM4354 datasheet(116/192 Pages) CYPRESS

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Signal Descriptions

BCM4354 Data Sheet

BROADCOM CONFIDENTIAL

Broadcom®

October 15, 2014 • 4354-DS109-R

Page 115

BT_UART_TXD

UART serial output. Serial data output for the HCI

UART interface.

Bluetooth/FM I2S

BT_I2S_CLK

I/O

I2S clock, can be master (output) or slave (input).

BT_I2S_DO

I/O

I2S data output

BT_I2S_DI

I/O

I2S data input

BT_I2S_WS

I/O

I2S WS; can be master (output) or slave (input).

Bluetooth GPIO

–

BT_GPIO_2

I/O

Bluetooth general-purpose I/O

–

BT_GPIO_3

I/O

Bluetooth general-purpose I/O

BT_GPIO_4

I/O

Bluetooth general-purpose I/O

–

BT_GPIO_5

I/O

Bluetooth general-purpose I/O

Miscellaneous

A10

WL_REG_ON

Used by PMU to power up or power down the internal

BCM4354 regulators used by the WLAN section.

Also, when deasserted, this pin holds the WLAN

section in reset. This pin has an internal 200 kΩ pull-

down resistor that is enabled by default. It can be

disabled through programming.

D10

BT_REG_ON

Used by PMU to power up or power down the internal

BCM4354 regulators used by the Bluetooth/FM

section. Also, when deasserted, this pin holds the

Bluetooth/FM section in reset. This pin has an internal

200 kΩ pull-down resistor that is enabled by default. It

can be disabled through programming.

BT_DEV_WAKE

I/O

Bluetooth DEV_WAKE

BT_HOST_WAKE

I/O

Bluetooth HOST_WAKE

Integrated Voltage Regulators

B11

SR_VDDBATA5V

Quiet VBAT

B12

SR_VDDBATP5V

Power VBAT

A11

SR_VLX

CBuck switching regulator output. Refer to Table 43

on page 158 for details of the inductor and capacitor

required on this output.

C12

LDO_VDD1P5

LNLDO input

E12

LDO_VDDBAT5V

LDO VBAT.

P11

WRF_XTAL_VDD1P5

XTAL LDO input (1.35V)

N10

WRF_XTAL_VDD1P2

XTAL LDO output (1.2V)

D11

VOUT_LNLDO

Output of LNLDO

C11

VOUT_CLDO

Output of core LDO

D12

VOUT_BTLDO2P5

Output of BT LDO

E11

VOUT_LDO3P3_B

Output of 3.3V LDO

Table 22: WLBGA Signal Descriptions

Ball#

Signal Name

Type Description

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