XM33C321ASPZR datasheet(84/122 Pages) TI2

84 / 122 page

• Support for bit reversal

• Support for custom polynomials

For more details, see the CRC chapter of the MSPM33C3x 160-MHz Microcontrollers Technical Reference

Manual.

8.14 Serial Communication Interfaces

8.14.1 UNICOMM (UART/I2C/SPI)

UNICOMM is a highly flexible peripheral which can be configured to operate with a UART, SPI, I2C Controller

or a I2C Target protocol at runtime. The user can select one of the serial interfaces during initialization. The

peripheral uses shared 16-deep FIFOs in each UCx instance to maximize the device capability. A serial

peripheral group (SPG) combines one or more UNICOMM instances for special functions like inter-module

internal loopback and I2C pairing. UNICOMM (UCx) Serial Interface describes the peripheral serial interfaces

available on each UNICOMM instance and how these are grouped into SPG groupings on the device.

Table 8-12. UNICOMM (UCx) Serial Interface

SPG Instance UNICOMM Instance

UART

SPI

I2C Controller

I2C Target

FIFO

SPG0 (PD0)

UC1_0

Yes

UC1_1

Yes

SPG1 (PD1)

UC2

Yes

UC15_0

Yes

UC15_1

Yes

UC12

Yes

UC13_0

Yes

SPG2 (PD1)

UC13_1

Yes

UC13_2

Yes

UC13_3

Yes

UC14

Yes

8.14.1.1 UART (UNICOMM)

The UART peripheral function provide the following key features:

• Standard asynchronous communication bits for start, stop, and parity

• Fully programmable serial interface

– 5, 6, 7 or 8 data bits

– Even, odd, stick, or no-parity bit generation and detection

– 1 or 2 stop bit generation

– Line-break detection

– Programmable baud rate generation with oversampling by 16, 8 or 3

– Local Interconnect Network (LIN) mode support

• Support transmit and receive loopback mode operation

• See Table 8-13 for detail information on supported protocols

Table 8-13. UART (UNICOMM) Features

Supported Features

UC1.UART

UC12.UART

UC13.UART

UC14.UART

Active in Stop and Standby Mode

Yes

Support hardware flow control

Yes

Support 9-bit configuration

Yes

Support LIN mode

Yes

Support DALI

Yes

MSPM33C321A, MSPM33C3219

SLASFB6A – DECEMBER 2025 – REVISED SEPTEMBER 2026

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