AM6421 datasheet(219/237 Pages) TI

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• Baud rate from 300 bps up to 3.6864 Mbps (subject to functional clock frequency)

• Auto-baud between 1200 bps and 115.2 Kbps

• Synchronous mode (USART) support with either external clock or generated clock

• Software/hardware flow control

– Programmable Xon/Xoff characters

– Programmable Auto-RTS and Auto CTS

• Programmable serial interface characteristics

– 5, 6, 7, or 8-bit characters

– Even, odd, mark (always 1), space (always 0), or no parity (non-parity bit frame) bit generation and

detection

– 1-, 1.5-, or 2-stop bit generation

• Optional multi-drop transmission

• Configurable time-guard feature

• False start bit detection

• Line break generation and detection

• Modem control functions (CTS, RTS, DSR, DTR, RI, and DCD)

• Fully prioritized interrupt system controls

• Internal test and loopback capabilities

• ISO7816 Functions

– Half duplex protocol using TX line in bidirectional mode

– Support for T+0 and T=1 protocols

• RS-485 External transceiver auto flow control support

For more information, see Universal Synchronous/Asynchronous Receiver/Transmitter (UART) section in

Peripherals chapter in the device TRM.

8.4.2.24 USB

The USB module supports the following main features:

USB interface:

• Compliant with USB 3.1 Gen1 specification

• Compliant with xHCI 1.1 specification

• Limited USB 2.0 on-the-go support

• SuperSpeed Gen1 (5 Gbps), high speed (480 Mbps), and full (12Mbps) Device

• SuperSpeed Gen1 (5 Gbps), high speed (480 Mbps), full (12Mbps), and low speed (1.5 Mbps) Host

• Single USB2.0 port

• Single USB3.1 port

Dual mode operation:

• OTG 2.0 host negotiation protocol (HNP) support

• OTG 2.0 session request support (SRP) support

Host mode:

• 64 slots supported

• Up to 128 periodic endpoints supported simultaneously

• 256 primary streams supported

• MSI support

• Root hub functionality

For more information, see Universal Serial Bus (USB) Subsystem section in Peripherals chapter in the device

TRM.

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AM6442, AM6441, AM6421

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SPRSP56 – JANUARY 2021

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