BCM43455 Preliminary Data Sheet
Pin Descriptions
Table 19: Signal Descriptions (Cont.)
Signal Name
WLBGA Ball
Type
Description
Bluetooth/FM I2S
2
BT_I2S_CLK
J1
I/O
I S clock, can be master (output) or
slave (input).
2
BT_I2S_DI
BT_I2S_DO
BT_I2S_WS
J2
H2
J3
I/O
I/O
I/O
I S data input.
2
I S data output.
2
I S WS; can be master (output) or slave
(input).
Bluetooth GPIO
BT_GPIO_2
J7
I/O
I/O
I/O
I/O
Bluetooth general-purpose I/O.
Bluetooth general-purpose I/O.
Bluetooth general-purpose I/O.
Bluetooth general-purpose I/O.
BT_GPIO_3
H6
H5
K4
BT_GPIO_4
BT_GPIO_5
Miscellaneous
WL_REG_ON
C4
C3
I
Used by PMU to power-up or power
down the internal BCM43455 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.
BT_REG_ON
I
Used by PMU to power-up or power
down the internal BCM43455 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
BT_HOST_WAKE
M1
L3
I/O
I/O
Bluetooth DEV_WAKE.
Bluetooth HOST_WAKE.
Integrated Voltage Regulators
SR_VDDBAT5V
SR_VLX
A2
B1
I
VBAT.
O
CBUCK switching regulator output.
Refer to Table 44 on page 130 for details
of the inductor and capacitor required on
this output.
LDO_VDD1P5
A3
A5
H10
H9
B4
B3
B5
I
LNLDO input.
LDO_VDDBAT5V
WRF_XTAL_VDD1P35
WRF_XTAL_VDD1P2
VOUT_LNLDO
I
LDO VBAT.
I
XTAL LDO input (1.35V).
XTAL LDO output (1.2V).
Output of LNLDO.
Output of core LDO.
Output of BT LDO.
O
O
O
O
VOUT_CLDO
VOUT_BTLDO2P5
Broadcom®
November 5, 2015 • 43455-DS109-R
Page 88
BROADCOM CONFIDENTIAL
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