UM1657 datasheet(14/48 Pages) STMICROELECTRONICS

14 / 48 page

Hardware description

UM1657

14/48

DocID025094 Rev 1

1.3

STEVAL-IKR001V7D (with SPIRIT1 RF module with external

power amplifier @169 MHz)

The STEVAL-IKR001V7D includes RF motherboard and SPIRIT1 RF module with external

power amplifier tuned for 169 MHz band. A SMA connector on the RF module, in B Figure 4,

allows connection with RF instruments as spectrum analyzer and signal generator to the

SPIRIT1 by RF cable or also connect an antenna as the one included in the demo kit. The

board is powered through the RF daughterboard connector, in Figure 4, by the RF

motherboard and communicates through this connector by SPI and some GPIOs with the

microcontroller.

The VCC_RF pin of the RF daughterboard connector is linked to the Vbat of the SPIRIT1

through the jumper D in Figure 4 that can be also removed to measure the current

consumption, while the jumper C in Figure 4 is used to provide voltage to the power

amplifier (3.3 V).

The RF module includes a memory EEPROM in which some information on the RF module

at manufactory time are stored. The information is stored in the first pages of the EEPROM.

The memory is not intended to be changed by user.

Figure 4. STEVAL-IKR001V7D (RF module)

UM1657 Datasheet(PDF) 14 Page - STMicroelectronics