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2.1
GPTM Features
This module contains four GPTM blocks with the following functional options:
•
Operating modes:
– 16- or 32-bit programmable one-shot timer
– 16- or 32-bit programmable periodic timer
– 16-bit general-purpose timer with an 8-bit prescaler
– 32-bit real-time clock (RTC) when using an external 32.768-KHz clock as the input
– 16-bit input-edge count- or time-capture modes
– 16-bit PWM mode with software-programmable output inversion of the PWM signal
•
Count up or down
•
Eight capture compare PWM pins (CCP)
•
Daisy chaining of timer modules to allow a single timer to initiate multiple timing events
•
User-enabled stalling when the microcontroller asserts CPU Halt flag during debug (excluding RTC
mode)
•
Ability to determine the elapsed time between the assertion of the timer interrupt and entry into the
interrupt service routine.
•
Efficient transfers using Micro Direct Memory Access Controller (µDMA)
– Dedicated channel for each timer
– Burst request generated on timer interrupt
2.2
Block Diagram
In the block diagram
device. See
Table 2-1
Timer A
Free-Running
Value
Interrupt /Config
GPTMCFG
Timer A
Interrupt
GPTMCTL
GPTMIMR
GPTMRIS
Timer B
GPTMMIS
Interrupt
GPTMICR
Timer B
Free-Running
Value
System
Clock
SPRUH22I – April 2012 – Revised November 2019
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(Figure
2-1), the specific capture compare PWM (CCP) pins available depend on the
for the available CCP pins and their timer assignments.
Figure 2-1. GPTM Block Diagram
Timer AControl
GPTMTAPMR
GPTMTAPR
GPTMTAMATCHR
GPTMTAILR
GPTMTAMR
Timer BControl
GPTMTBMR
GPTMTBILR
GPTMTBMATCHR
GPTMTBPR
GPTMTBPMR
Copyright © 2012–2019, Texas Instruments Incorporated
0x0000 (DownCounterModes)
0xFFFF (UpCounterModes)
TA Comparator
GPTMTAR
En
GPTMTAV
GPTMTBV
GPTMTBR
En
TB Comparator
0x0000 (DownCounterModes)
0xFFFF (UpCounterModes)
M3 General-Purpose Timers
GPTM Features
Clock /Edge
Detect
32 KHzor
Even CCPPin
RTC Divider
Clock /Edge
Detect
Odd CCPPin
299
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