AT90PWM1 Atmel Corporation, AT90PWM1 Datasheet - Page 140
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AT90PWM1
Manufacturer Part Number
AT90PWM1
Description
Manufacturer
Atmel Corporation
Specifications of AT90PWM1
Flash (kbytes)
8 Kbytes
Pin Count
24
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
8
Hardware Qtouch Acquisition
No
Max I/o Pins
19
Ext Interrupts
4
Usb Speed
No
Usb Interface
No
Spi
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
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
0.5
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT90PWM1-16SU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
AT90PWM161-16MN
Manufacturer:
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Quantity:
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Part Number:
AT90PWM161-WN
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Quantity:
20 000
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16.8.4
16.8.4.1
16.8.4.2
140
AT90PWM1
PSC Input Configuration
Filter Enable
Signal Polarity
Figure 16-19. Burst Generation
The PSC Input Configuration is done by programming bits in configuration registers.
If the “Filter Enable” bit is set, a digital filter of 4 cycles is inserted before evaluation of the signal.
The disable of this function is mainly needed for prescaled PSC clock sources, where the noise
cancellation gives too high latency.
Important: If the digital filter is active, the level sensitivity is true also with a disturbed PSC clock
to deactivate the outputs (emergency protection of external component). Likewise when used as
fault input, PSCn Input A or Input B have to go through PSC to act on PSCOUTn0/1/2/3 output.
This way needs that CLK
(PAOCnA/B), PSCnIN0/1 input can desactivate directly the PSC output. Notice that in this case,
input is still taken into account as usually by Input Module System as soon as CLK
PSC Input Filterring
One can select the active edge (edge modes) or the active level (level modes) See PELEVnx bit
description in Section “PSC n Input A Control Register – PFRCnA”, page 16116.25.13.
PSCOUTn0
PSCOUTn1
PSCn Input A
(high level)
PSCn Input A
(low level)
PSC Input
Module X
CLK
PSC
PSC
OFF
is running. So thanks to PSC Asynchronous Output Control bit
Digital
Filter
4 x CLK
PSC
BURST
Ouput
Stage
PSCn Input A or B
PSCOUTnX
PIN
PSC
4378C–AVR–09/08
is running.
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