Texas Instruments MSP430x1xx - Manual (Page 217)

12-1
USART Peripheral Interface, UART Mode
USART Peripheral Interface, UART Mode
The universal synchronous/asynchronous receive/transmit (USART) serial-
communication peripheral supports two serial modes with one hardware
configuration. These modes shift a serial bit stream in and out of the MSP430
at a programmed rate or at a rate defined by an external clock. The first mode
is the universal asynchronous receive/transmit (UART) communication
protocol; the second is the serial peripheral interface (SPI) protocol (discussed
in Chapter 13).
Bit SYNC in control register UCTL selects the required mode:
SYNC = 0: UART – asynchronous mode selected
SYNC = 1: SPI – synchronous mode selected
This chapter addresses the UART mode.
Topic Page
12.1 USART Peripheral Interface 12-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.2 USART Peripheral Interface, UART Mode 12-3 . . . . . . . . . . . . . . . . . . . . . .
12.3 Asynchronous Operation 12-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.4 Interrupt and Enable Functions 12-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.5 Control and Status Registers 12-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.6 Utilizing Features of Low-Power Modes 12-22 . . . . . . . . . . . . . . . . . . . . . . .
12.7 Baud Rate Considerations 12-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 12