BCM43236BKMLG Datasheet, PDF (23/43 Pages) Cypress Semiconductor – 2.4 GHz/5 GHz IEEE802.11n MAC/PHY/Radio Chip

BCM43236/BCM43236B Preliminary Data Sheet
Signal and Pin Descriptions
Section 4: Signal and Pin Descriptions
Package Signal Descriptions
The signal name, type, and description of each pin in the BCM43236/BCM43236B 88-pin QFN package is listed
in Table 3. The symbols shown under Type indicate pin directions (I/O = bidirectional, I = input, O = output) and
the internal pull-up/pull-down characteristics (PU = weak internal pull-up resistor and PD = weak internal pull-
down resistor), if any. See also Table 4 on page 26 for resistor strapping options.
Signal
Crystal Oscillator
xtal_in
xtal_out
xtal_buf_out
Serial Flash Interface
sflash_cs_l
sflash_q
sflash_c
sflash_d
USB Interface
usb_dmns
usb_dpls
usb_rref
hsic_strb
hsic_data
usb_moncdr
Miscellaneous Signals
rcal_res_ext_core
ext_por
Table 3: Signal Descriptions
BCM43236/
BCM43236B Type
Description
49
I
48
O
51
O
XTAL oscillator input. Connect a 20 MHz, 10 ppm
crystal between the xtal_in and xtal_out pins.
XTAL oscillator output
Buffered XTAL output
2
O (8 mA-PU) Serial flash chip select
3
I (8 mA-PU) Serial flash data input
4
O (8 mA-PD) Serial flash clock
5
O (8 mA)
Serial flash data output
71
I/O
70
I/O
75
O
74
O
73
I/O
68
–
USB interface port D–
USB interface port D+
During USB mode, tie this pin in parallel through
a 100 pF capacitor and a 4 kΩ resistor to ground.
During HSIC mode, tie this pin to a 50Ω resistor
to ground.
USB HSIC strobe
USB HSIC data
For test/diagnostic purposes only.
44
O
52
I
Reference output, connect to ground via 15k 1%
resistor.
External power-on reset (POR) input. Active low.
Allows an optional external power-on reset
circuit to be connected. If installed, the external
POR will override the internal POR.
BROADCOM ®
September 16, 2013 • 43236_43236B-DS103-R
Page 22