Texas Instruments MSP430 Student Guide

Lab 4a – Program the MSP430 Clocks
12. Build the code and fix any errors. When no errors exist, launch the debugger.
Debugging the Clocks
Before running the code, let’s set some breakpoints and watch expressions.
13. Open myClocks.c in the debugger.
14. Add a watch expression for myACLK (in KHz).
Select myACLK in your code → Rt-click → Add Watch Expression…
Enter ‘myACLK/1024’ into the dialog and hit OK. Upon hitting “OK”, the Expressions
window should open up, if it’s not already open.
In a minute, this should give us a value of 32, if ACLK is running at 32KHz.
15. Go ahead and create similar watch expressions for SMCLK and MCLK.
mySMCLK/1024
myMCLK/1024
16. Finally, let’s add two breakpoints to myClocks.c.
These breakpoints will let us view the
expressions before … and after our
clock initialization code runs.
MSP430 Workshop - MSP430 Clocks & Initialization 4 - 51

Texas Instruments MSP430 Specifications

General

Program Memory Type	Flash
Clock Speed	Up to 25 MHz (depending on the specific device)
Flash Memory	Up to 512 KB (depending on the specific device)
RAM	Up to 66 KB (depending on the specific device)
Operating Voltage	1.8V - 3.6V (depending on the specific device)
ADC	10-bit or 12-bit SAR ADC
Communication Interfaces	UART, SPI, I2C, USB
DMA	Yes (depending on the specific device)
Operating Temperature	-40°C to +85°C
Architecture	16-bit RISC
Low Power Modes	Multiple (LPM0 to LPM4)