Power On Reset

The W_DISABLE1# pin on the Sona TI351 drives the radio reset input. This signal must be controlled by the host platform GPIO.

Power Supply Restrictions

The Sona TI351 SDIO interface operates at 1.8V only. The host platform SDIO interface must operate at 1.8V at all times, including during bus enumeration.

SDIO_WAKE Strapping

The SDIO_WAKE# signal on the Sona TI351 M.2 1216 solder down module is a SenseOnPower pin. This signal is pulled low internally and must be low when the device powers up. It must not be pulled high or driven high by the host platform. The Sona TI351 M.2 2230 plugin module buffers this signal before making it available as HOST_IRQ_WL so it does not have the same restriction.

UART Handshaking

The UART interface requires RTS/CTS hardware handshaking.

Wake On Wireless

The SDIO_WAKE# signal is used to implement Wake On Wireless and must be implemented if Wake On Wireless is desired. This signal can also be used as the SDIO interrupt in place of in-band SDIO interrupt. It does not need to be implemented if Wake On Wireless is not required.