Infineon CYW920819M2EVB-01, User Manual, Page: 23 / 35

User Guide 23 of 35 002-36452 Rev. **
2022-10-07
CYW920819M2EVB-01 evaluation kit user guide
Hardware
3 Hardware
This chapter describes the CYW920819M2EVB-01 hardware and its different blocks such as reset control,
Arduino-compatible headers, and module connectors.
The schematics for the baseboard and carrier module can be found on the CYW920819M2EVB-01 kit page.
3.1 Carrier module
The baseboard of the CYW920819M2EVB-01 board is designed to be modular so that various carrier modules
can be used with the same baseboard. In this kit, the CYW920819M2IPA1 carrier M.2 radio card module, which
employs the CYW20819 device, is connected to the baseboard through M.2 Interface. The carrier module
interface is a generic interface that can be used across may devices. See
CYW20819 device I/O mapping for a
detailed interface description. The Bluetooth® antenna is etched on the carrier module PCB. UART signals and
GPIOs are brought out to module pins to interface with the baseboard.
3.1.1 CYW20819
The CYW920819M2EVB-01 board employs the CYW20819A1KFBG device which is a 62-BGA package. This board
uses all 22 LHL GPIOs provided by the 62-BGA package.
3.1.2 Antenna
A PCB antenna is etched on the carrier module. This antenna is matched to 50 Ω when the CYW920819M2EVB-
01 board is placed on a table. Table 21 lists the S11 measurement. See AN91445 – Antenna design and RF
layout guidelines for additional information.
Table 21 Antenna S11 measurement
2402 MHz 2441 MHz 2480 MHz
-13.2 dB -14.6 dB -12.6 dB
3.1.3 Crystal
The CYW20819 carrier module has two crystals on-board. A 24-MHz crystal (XTAL) is the main crystal. This XTAL
must have an accuracy of +/-20 ppm as defined by the Bluetooth® specification. A 32.768-kHz crystal provides
accurate timing during low-power operation. See the CYW20819
datasheet for crystal requirements.
3.2 Baseboard
CYW9BTM2BASE2 is a baseboard on which the CYW20819 carrier module is connected to.