Data Sheet

5.5.2 LP_CLK Port
A 32.768KHz clock source should be supplied to LP_CLK pin to enable the lowest power operation in power save modes. The frequen-
cy tolerance of this source affects wake up scheduling.
5.6 Multi-Protocol Coexistence
In case an RF transceiver using the same 2.4 GHz band (e.g. Bluetooth, Zigbee, or Thread) is co-located with the WFM200S Wi-Fi
transceiver, the Packet Traffic Arbitration (PTA) interface can be used to minimize mutual interference. In this case, PTA pins are con-
nected to the other transceiver. The PTA interface is highly programmable and can use 1, 2, 3, or 4 pins upon configuration. WFM200S
embeds a Packet Traffic Arbitration block in order to share the access to the RF medium between WLAN and another standard.
Depending on manufacturer, PTA signal names can vary and the table below shows some alternative naming:
Table 5.1. PTA Alternative Naming
WFM200S Pin Name Alternative Names
PTA_TX_CONF GRANT, WL_ACTIVE, WL_DENY
PTA_RF_ACT REQUEST, BT_ACTIVE
PTA_STATUS PRIORITY, BT_STATUS
PTA_FREQ FREQ, BT_FREQ
PTA interface configuration is also achieved via the configuration file.
See AN1224 for more information regarding PTA and coexistence management on WFM200S, as well as AN1128 for EFR32BGx and
EFR32MGx devices supporting BLE, Zigbee, and Thread.
WFM200S Data Sheet
Typical Applications and Connections
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