CYW43362
Table 9. WLBGA Signal Descriptions
Ball # Signal Name
Type
Description
WLAN RF Interface
A1
B1
D5
WRF_RFIN
I
WLAN IEEE 802.11n RX input (50Ω)
WRF_RFOUT
O
I
WLAN IEEE 802.11n internal power amplifier output (50Ω)
Connect to external 15 kΩ resistor (1%) to ground
WRF_RES_EXT
RF Control Lines (IO Supply = VDDIO_RF)
E1
F1
G2
F2
RF_SW_CTRL0
RF_SW_CTRL1
RF_SW_CTRL2
RF_SW_CTRL3
O
O
O
O
RF switch control line. Default at this pin is high.
RF switch control line. Default at this pin is low.
RF switch control line. Default at this pin is low.
RF switch control line. Default at this pin is low.
Note:
1. Use only RF_SW_CTRL1 and RF_SW_CTRL2 unless diversity is required, in which case RF_SW_CTRL0 and
RF_SW_CTRL3 can also be used to select the antenna for a pair of SPDT switches.
2. For a transfer switch, use only RF_SW_CTRL1 and RF_SW_CTRL2 with the main antenna to Rx when
RF_SW_CTRL1 is high.
3. For a diamond-type switch, do the following:
■
■
■
■
RF_SW_CTRL0 must select WLAN Tx, aux antenna.
RF_SW_CTRL1 must select WLAN Rx, main antenna.
RF_SW_CTRL2 must select WLAN Tx, main antenna.
RF_SW_CTRL2 must select WLAN Rx, aux antenna.
4. For cases where a shared antenna is used for WLAN and Bluetooth, RF_SW_CNTRL_0 defaults to HIGH when the
CYW43362 is in reset. Use a switch topology in which the Bluetooth RF path is connected to the antenna when this
signal is HIGH. This allows Bluetooth access to the antenna when WLAN is in reset.
5. The following is a list of the internal pull-up/pull-down resistor strengths for the RF switch control lines when the
CYW43362 is in reset:
Minimum
Typical
Maximum
–
–
pup @ 3.3V
pdn @ 3.3V
39K
39K
58K
58K
69K
67K
6. The default drive strength is 6.0 mA.
Document No. 002-14779 Rev. *G
Page 33 of 60
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