AT90PWM216 Atmel Corporation, AT90PWM216 Datasheet - Page 159
AT90PWM216
Manufacturer Part Number
AT90PWM216
Description
Manufacturer
Atmel Corporation
Specifications of AT90PWM216
Flash (kbytes)
16 Kbytes
Pin Count
24
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
19
Ext Interrupts
4
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
2
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 105
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
4
Output Compare Channels
12
Input Capture Channels
1
Pwm Channels
7
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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16.18.2
16.18.3
7710F–AVR–09/11
Event Capture
Using the Input Capture Unit
Table 16-7.
The PSC can capture the value of time (PSC counter) when a retrigger event or fault event
occurs on PSC inputs. This value can be read by sofware in PICRnH/L register.
There are 2 ways to trigger a capture of the PSC counter in the PICRn Register.
The main challenge when using the Input Capture unit is to assign enough processor capacity
for handling the incoming events. The time between two events is critical. If the processor has
not read the captured value in the PICRn Register before the next event occurs, the PICRn will
be overwritten with a new value. In this case the result of the capture will be incorrect.
When using the Input Capture interrupt, the PICRn Register should be read as early in the inter-
rupt handler routine as possible. Even though the Input Capture interrupt has relatively high
priority, the maximum interrupt response time is dependent on the maximum number of clock
cycles it takes to handle any of the other interrupt requests.
Input Mode
Number :
6
7
8
9
10
11
12
13
14
15
– Hardware input capture triggered by a signal on PSC inputs.
– Software input capture triggered by the PCSTn bit
Available Input Modes according to Running Modes
1 Ramp Mode
Do not use
Valid
Valid
Valid
Do not use
Valid
Do not use
2 Ramp Mode
Valid
Valid
Valid
Valid
Valid
4 Ramp Mode
Valid
Valid
Valid
Valid
Valid
AT90PWM216/316
Centered Mode
Do not use
Valid
Do not use
Do not use
Do not use
159
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