Texas Instruments mmWaveICBoost, User Manual, Page: 64 / 82

5.2 IWR6843ISK/IWR6843ISK-ODS Block Diagram
Figure 5-5 shows the functional block diagram.
LP8770
PMIC
SW B0
SW B1
LOAD SW
TPS22917
2 m
INA226
TEMP SENS
TMP112A
2 m
INA226
QSPI flash
MX25V1635
2 m
2 m
INA226
EEPROM
CAT24C08
LDO
TPS7A53
INA226
IWR6843
CHIP
60 PIN CONNECTOR 60 PIN CONNECTOR
5 V
LVDS
DP[15:8]
GPIO [2:0]
DP [7:0]
LVDS
SPI
JTAG
RS232
RESET
MISC
RX
TX
1.7 V
VPP
VOUT_PA
VOUT_SYNTH
VOUT_PLL
VBGAP
1.8 V
1.24 V
1.0/1.24 V
1.2 V 1.8 V 1.0 V
OPTIONAL
XTAL
40 MHz
3.3 V
3.3 V
I2C
Figure 5-5. Block Diagram of IWR6843ISK/IWR6843ISK-ODS
5.3 PCB Storage and Handling Recommendations
The immersion silver finish of the PCB provides a better high-frequency performance, but is also prone to
oxidation in open environments. This oxidation causes the surface around the antenna region to blacken.
To avoid oxidation, the PCB should be stored in an ESD cover and kept at a controlled room temperature with
low humidity conditions. All ESD precautions must be taken while using and handling the EVM.
5.4 Power Connections
The Industrial starter kit is powered by the 3.3 V from the 60-pin HD connectors. When power is supplied, an on-
board PMIC and LDO generate the voltages. The PGOOD LED glows to indicate all voltage rails are in limits.
Note
After the 3.3-V supply is provided to the EVM, TI recommends toggling the NRST signal once to
ensure a reliable boot-up state; this signal is accessible on the 60-pin HD connector.
IWR6843ISK / IWR6843ISK-ODS (deprecated) www.ti.com
64 mmWaveICBoost and Antenna Module SWRU546D – OCTOBER 2018 – REVISED NOVEMBER 2020
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