Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Hoja De Datos
Los códigos de productos
ATSAM4S-XPLD
759
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
36.
Timer Counter (TC)
36.1
Description
The Timer Counter (TC) includes 3 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.
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 interrupt signal which can be programmed to generate
processor interrupts.
can be configured by the user. Each channel drives an internal interrupt signal which can be programmed to generate
processor interrupts.
The Timer Counter (TC) embeds a quadrature decoder logic connected in front of the timers and driven by TIOA0, TIOB0
and TIOA1 inputs. When enabled, the quadrature decoder performs the input lines filtering, decoding of quadrature
signals and connects to the timers/counters in order to read the position and speed of the motor through the user
interface.
and TIOA1 inputs. When enabled, the quadrature decoder performs the input lines filtering, decoding of quadrature
signals and connects to the timers/counters in order to read the position and speed of the motor through the user
interface.
The Timer Counter block has two global registers which act upon all TC channels.
The Block Control Register allows the 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.
gives the assignment of the device Timer Counter clock inputs common to Timer Counter 0 to 2.
Note:
1.
When Slow Clock is selected for Master Clock (CSS = 0 in PMC Master Clock Register), TIMER_CLOCK5
input is equivalent to Master Clock.
input is equivalent to Master Clock.
36.2
Embedded Characteristics
Six 16-bit Timer Counter Channels
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
Two global registers that act on all three TC Channels
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
SLCK