The R5F64189DFBUB is a microcontroller from Renesas Electronics. It is part of the RX600 family of 32-bit devices. This microcontroller features 64 kB of Flash memory, 2 kB of data flash memory, 2 kB of RAM memory, 128-bit wide single-precision floating-point unit (SFU), and an integrated LCD controller. It also supports up to 4x UARTs, 2x SCI, I2C, S12ADc, S12Timer, and RTC. Additionally, it has on-chip debugging, and offers a variety of other peripheral functions.