SAM3N0A Atmel Corporation, SAM3N0A Datasheet - Page 579
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SAM3N0A
Manufacturer Part Number
SAM3N0A
Description
Manufacturer
Atmel Corporation
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31. Timeer Counter (TC)
31.1
31.2
11011A–ATARM–04-Oct-10
11011A–ATARM–04-Oct-10
Description
Embedded Characteristics
The Timer Counter (TC) includes three identical 16-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 (TC) embeds a quadrature decoder logic connected in front of the 3 timers
and driven by TIOA0, TIOB0 and TIOA1 inputs. When enabled, the quadrature decoder per-
forms the input lines filtering, decoding of quadrature signals and connects to the 3
timers/counters in order to read the position and speed of the motor through user interface.
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 31-1
Counter 0 to 2.
Table 31-1.
Note:
Name
TIMER_CLOCK1
TIMER_CLOCK2
TIMER_CLOCK3
TIMER_CLOCK4
TIMER_CLOCK5
• Three 16-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
1. When Slow Clock is selected for Master Clock (CSS = 0 in PMC Master CLock Register),
TIMER_CLOCK5 input is Master Clock, i.e., Slow CLock modified by PRES and MDIV fields.
gives the assignment of the device Timer Counter clock inputs common to Timer
Timer Counter Clock Assignment
(1)
Definition
MCK/2
MCK/8
MCK/32
MCK/128
SLCK
SAM3N
SAM3N
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