Atmel SAM9X25, Manual

Page: 693 / 1145

693
11054A–ATARM–27-Jul-11
SAM9X25
693
11054A–ATARM–27-Jul-11
SAM9X25
36. Timer Counter (TC)
36.1 Embedded Characteristics
• Three 32-bit Timer Counter Channels
• A Wide Range of Functions Including:
– Frequency Measurement
– Event Counting
– Interval Measurement
– Pulse Generation
– Delay Timing
– Pulse Width Modulation
– Up/down Capabilities
• Each Channel is User-configurable and Contains:
– Three External Clock Inputs
– Five Internal Clock Inputs
– Two Multi-purpose Input/Output Signals
• Internal Interrupt Signal
• Two Global Registers that Act on All Three TC Channels
36.2 Description
The Timer Counter (TC) includes three identical 32-bit Timer Counter channels.
Each channel can be independently programmed to perform a wide range of functions including
frequency measurement, event counting, interval measurement, pulse generation, delay timing
and pulse width modulation.
Each channel has three external clock inputs, five internal clock inputs and two multi-purpose
input/output signals which can be configured by the user. Each channel drives an internal inter-
rupt signal which can be programmed to generate processor interrupts.
The Timer Counter block has two global registers which act upon all three TC channels.
The Block Control Register allows the three channels to be started simultaneously with the same
instruction.
The Block Mode Register defines the external clock inputs for each channel, allowing them to be
chained.
Table 36-1 gives the assignment of the device Timer Counter clock inputs common to Timer
Counter 0 to 2.
Table 36-1. Timer Counter Clock Assignment
Name Definition
TIMER_CLOCK1 MCK/2
TIMER_CLOCK2 MCK/8
TIMER_CLOCK3 MCK/32
TIMER_CLOCK4 MCK/128
TIMER_CLOCK5
(1)
SLCK