Figure 1-3 Bottom View of UM982-EB
(1) Antenna short protection circuit
(2) Anti-static design and heat dissipation with exposed copper
(3) VCC power supply and LDO circuit
(4) Backup battery
(5) 5 V DC/DC boost circuit for antenna feeding
(6) Dual-row pins as external interfaces
(7) Debug ports
(8) Ports used to connect jumpers