BCM43455 Datasheet, PDF (42/159 Pages) Cypress Semiconductor – Single-Chip 5G WiFi IEEE 802.11ac MAC/Baseband/ Radio with Integrated Bluetooth 4.1 and FM Receiver

BCM43455 Preliminary Data Sheet
Bluetooth Power Management Unit
Note: Pad function Control Register is set to 0 for these pins. See “DC Characteristics” on page 97 for
more details.
Table 4: Power Control Pin Description
Signal
BT_DEV_WAKE
BT_HOST_WAKE
BT_CLK_REQ
Mapped to Pin
BT_GPIO_0
Type
I
BT_GPIO_1
O
BT_CLK_REQ_OUT O
WL_CLK_REQ_OUT
Description
Bluetooth device wake-up: Signal from the host to the
BCM43455 indicating that the host requires attention.
• Asserted: The Bluetooth device must wake-up or
remain awake.
• Deasserted: The Bluetooth device may sleep when
sleep criteria are met.
The polarity of this signal is software configurable and
can be asserted high or low.
Host wake-up. Signal from the BCM43455 to the host
indicating that the BCM43455 requires attention.
• Asserted: host device must wake-up or remain
awake.
• Deasserted: host device may sleep when sleep
criteria are met.
The polarity of this signal is software configurable and
can be asserted high or low.
The BCM43455 asserts BT_CLK_REQ when Bluetooth
or WLAN wants the host to turn on the reference clock.
The BT_CLK_REQ polarity is active-high. Add an
external 100 kΩ pull-down resistor to ensure the signal
is deasserted when the BCM43455 powers up or resets
when VDDIO is present.
Broadcom^®
November 5, 2015 • 43455-DS109-R
BROADCOM CONFIDENTIAL
Page 41