MSP430F5438A: BSL entry via UART

Part Number: MSP430F5438A

Hi,

I read this slau319c document relating to the BSL. However, I am still unsure whether special hardware configuration is needed to ensure BSL entry ? If you have a host connection hanging off a UART connection, can I enter the BSL purely using commands sent across the TX and RX lines or do I need to manipulate the JTAG pins as described in slau319c to ensure BSL entry ?

Regards,

Ian