TMS320VC5505 datasheet(95/135 Pages) TI

95 / 135 page

TMS320VC5505

www.ti.com

SPRS503B – JUNE 2009 – REVISED JANUARY 2010

6.13 Universal Asynchronous Receiver/Transmitter (UART)

The UART performs serial-to-parallel conversions on data received from an external peripheral device and

parallel-to-serial conversions on data transmitted to an external peripheral device via a serial bus.

The VC5505 has one UART peripheral with the following features:

•

Programmable baud rates (frequency pre-scale values from 1 to 65535)

•

Fully programmable serial interface characteristics:

–

5, 6, 7, or 8-bit characters

–

Even, odd, or no PARITY bit generation and detection

–

1, 1.5, or 2 STOP bit generation

•

16-byte depth transmitter and receiver FIFOs:

–

The UART can be operated with or without the FIFOs

–

1, 4, 8, or 14 byte selectable receiver FIFO trigger level for autoflow control and DMA

•

DMA signaling capability for both received and transmitted data

•

CPU interrupt capability for both received and transmitted data

•

False START bit detection

•

Line break generation and detection

•

Internal diagnostic capabilities:

–

Loopback controls for communications link fault isolation

–

Break, parity, overrun, and framing error simulation

•

Programmable autoflow control using CTS and RTS signals

6.13.1 UART Peripheral Register Description(s)

Table 6-24 shows the UART registers.

Table 6-24. UART Registers

HEX ADDRESS

ACRONYM

RANGE

1B00h

RBR

Receiver Buffer Register (read only)

1B00h

THR

Transmitter Holding Register (write only)

1B02h

IER

Interrupt Enable Register

1B04h

IIR

Interrupt Identification Register (read only)

1B04h

FCR

FIFO Control Register (write only)

1B06h

LCR

Line Control Register

1B08h

MCR

Modem Control Register

1B0Ah

LSR

Line Status Register

1B0Ch

MSR

Modem Status Register

1B0Eh

SCR

Scratch Register

1B10h

DLL

Divisor LSB Latch

1B12h

DLH

Divisor MSB Latch

1B18h

PWREMU_MGMT

Power and Emulation Management Register

Peripheral Information and Electrical Specifications

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