BCM88335 Data Sheet
Table of Contents
One-Time Programmable Memory............................................................................................................ 53
GPIO Interface............................................................................................................................................. 54
External Coexistence Interface ................................................................................................................. 54
UART Interface............................................................................................................................................ 54
JTAG Interface............................................................................................................................................ 55
Section 9: WLAN Host Interfaces..................................................................................... 56
SDIO v3.0..................................................................................................................................................... 56
SDIO Pins.............................................................................................................................................. 56
Generic SPI Mode....................................................................................................................................... 58
SPI Protocol .......................................................................................................................................... 59
Command Structure....................................................................................................................... 60
Write............................................................................................................................................... 60
Write/Read ..................................................................................................................................... 60
Read............................................................................................................................................... 60
Status............................................................................................................................................. 61
gSPI Host-Device Handshake............................................................................................................... 63
Boot-Up Sequence................................................................................................................................ 63
Section 10: Wireless LAN MAC and PHY ........................................................................ 66
IEEE 802.11ac MAC .................................................................................................................................... 66
PSM ............................................................................................................................................... 67
WEP............................................................................................................................................... 68
TXE................................................................................................................................................ 68
RXE................................................................................................................................................ 68
IFS.................................................................................................................................................. 69
TSF ................................................................................................................................................ 69
NAV................................................................................................................................................ 69
MAC-PHY Interface........................................................................................................................ 69
IEEE 802.11ac PHY..................................................................................................................................... 70
Section 11: WLAN Radio Subsystem ............................................................................. 72
Receiver Path.............................................................................................................................................. 72
Transmit Path.............................................................................................................................................. 72
Calibration................................................................................................................................................... 72
Section 12: Pinout and Signal Descriptions ................................................................... 74
Ball Maps..................................................................................................................................................... 74
Signal Descriptions.................................................................................................................................... 75
WLAN GPIO Signals and Strapping Options ........................................................................................... 82
Multiplexed Bluetooth GPIO Signals..................................................................................................... 83
GPIO/SDIO Alternative Signal Functions ................................................................................................. 85
Broadcom®
September 23, 2015 • 88335-DS100-R
Page 7
BROADCOM CONFIDENTIAL
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