Overview of MSP430 Timers
Timer Summary
The ‘F5529 contains most of the different types of timers found across the MSP430 family; in fact,
the only type of timer not present on this device is the high-resolution TIMER_D.
The following summary provides a snapshot of what timers are found on various MSP430
devices. You’ll find our ‘F5529 and ‘FR5969 devices in the last two columns of the table.
A one-line summary of each type of timer is listed below the table.
MSP430 Timers
L092 G2553 FG479 F5172 F5529 FR5969
Timer_A
2 x A3 2 x A3 1 x A3 1 x A3
1 x A5
2 x A3
2 x A3
2 x A2
*
Timer_B
1 x B3 1 x B7 1 x B7
Timer_D
2 x D3
Real-Time
Clock
with RTC
RTC_A RTC_B
Watchdog
WDT_A WDT+ WDT+ WDT_A WDT_A WDT_A
Timer_A: ‘A3’ means it has 3 Capture/Compare Registers (used to generate signals & ints)
Timer_B: Same as A, but improves PWM
Timer_D: Same as B, adding hi-res timing
WDT+: Watchdog or Interval Modes; PSW Protected; Can stop; Select Clk; Clk fail-safe
WDT_A: Same as WDT+, but with 8 timer intervals rather than 4
BT1/RTC: Basic timer has 2x8-bit counters (can use as 1x16-bits) with calander functions
RTC_A: 32-bit counter with a calendar, flexible programmable alarm, and calibration
RTC_B: Same as RTC_A, but adds switchable battery backup in case main-power fails
MSP430 Workshop - Timers 6 - 5
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