MSP430F42x

MIXED SIGNAL MICROCONTROLLER

SLAS421 − APRIL 2004

13

POST OFFICE BOX 655303

WDT+ watchdog timer

The primary function of the watchdog timer (WDT+) module is to perform a controlled system restart after a

software problem occurs. If the selected time interval expires, a system reset is generated. If the watchdog

function is not needed in an application, the module can be configured as an interval timer and can generate

interrupts at selected time intervals.

timer_A3

Timer_A3 is a 16-bit timer/counter with three capture/compare registers. Timer_A3 can support multiple

capture/compares, PWM outputs, and interval timing. Timer_A3 also has extensive interrupt capabilities.

Interrupts may be generated from the counter on overflow conditions and from each of the capture/compare

registers.

Timer_A3 Signal Connections

Input Pin Number

Device Input Signal

Module Input Name

Module Block

Module Output Signal

Output Pin Number

48 - P1.5

TACLK

TACLK

ACLK

ACLK

Timer

NA

SMCLK

SMCLK

Timer

NA

48 - P1.5

TACLK

INCLK

53 - P1.0

TA0

CCI0A

53 - P1.0

52 - P1.1

TA0

CCI0B

CCR0

TA0

DVSS

GND

CCR0

TA0

DVCC

VCC

51 - P1.2

TA1

CCI1A

51 - P1.2

51 - P1.2

TA1

CCI1B

CCR1

TA1

DVSS

GND

CCR1

TA1

DVCC

VCC

45 - P2.0

TA2

CCI2A

45 - P2.0

ACLK (internal)

CCI2B

CCR2

TA2

DVSS

GND

CCR2

TA2

DVCC

VCC

USART0

The MSP430F42x devices have one hardware universal synchronous/asynchronous receive transmit

(USART0) peripheral module that is used for serial data communication. The USART supports synchronous

SPI (3 or 4 pin) and asynchronous UART communication protocols, using double-buffered transmit and receive

channels.

hardware multiplier

The multiplication operation is supported by a dedicated peripheral module. The module performs 16

16,

16

8, 8

16, and 8

8 bit operations. The module is capable of supporting signed and unsigned multiplication

as well as signed and unsigned multiply and accumulate operations. The result of an operation can be accessed

immediately after the operands have been loaded into the peripheral registers. No additional clock cycles are

required.

SD16

The SD16 module integrates three independent 16-bit sigma-delta A/D converters, internal temperature sensor

and built-in voltage reference. Each channel is designed with a fully differential analog input pair and

programmable gain amplifier input stage.