BCM4319XKUBGT Datasheet, PDF (57/84 Pages) Cypress Semiconductor – Single-Chip IEEE 802.11™ a/b/g/n MAC/Baseband/ Radio with Integrated SDIO and USB Interfaces

BCM4319 Preliminary Data Sheet
Strapping Options and GPIO Functions
Table 8: Strapping Options
Default
Pin Name Ball # State Function
Description
GPIO_0
GPIO_1
GPIO_2
GPIO_3
GPIO_6
GPIO_7
GPIO_8
GPIO_9
WK8 Low
WH10 Low
WK9 –
WJ9 Low
WK10 Low
WJ10 High
WM4 Low
WF11 High
Selects Interface
–
modes^a (depends on
strapping). This pin
should not be used as a
generic input and
should not be driven by
other devices.
GPIO
–
GPIO
–
GPIO
–
GPIO[7:6]
[7:6] = 00
[7:6] = 01
[7:6] = 10
Sets SDIO and USB
Boot mode
[7:6] = 11
0
1
–
USB mode ( strapping):
• 0: normal (default)
• 1: USB CPU-less mode
SDIO mode ( strapping):
• 0: SDIO (default)
• 1: gSPI mode
gSPI clock polarity strapping in gSPI
mode: do not care in all other modes^b.
Default = 0
No strapping functions for this pin
gSPI clock phase strapping in gSPI
mode: do not care in all other modes.
OTP enabled, use default SDIO CIS
01 Reserved
OTP enabled, load SDIO CIS from
OTP (default)
11 Reserved
USB mode (default)
SDIO mode
USB mode:
USB normal mode
0: remap to RAM, ARM held in
reset after POR (internal use only)
1: boot from ROM, ARM automatically
runs after POR (required for USB
normal mode)
USB CPU-less mode:
Do not care, ARM held in reset
after POR
SDIO/gSPI Mode
Do not care, ARM held in reset
after POR
a. Typically used as an output for WLAN_HOST_WAKE and as an out-of-band interrupt for the SDIO interface. It
has a hardware generated interrupt and is always valid (unlike the SDIO in-band interrupt, which is valid only
when data is not driven on the SDIO lines). This out-of-band interrupt mimics the final in-band interrupts so all of
the interrupt enables (such as per-function interrupt enables) should be set appropriately.
b. This pin is often used as an input for the out-of-band power control signal WLAN_WAKE.
Broadcom^®
April 2, 2014 • 4319-DS05-R
Single-Chip IEEE 802.11™ a/b/g/n MAC/Baseband/Radio
Page 56