AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 99
AT90PWM81
Manufacturer Part Number
AT90PWM81
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT90PWM161.pdf
(325 pages)
Specifications of AT90PWM81
Flash (kbytes)
8 Kbytes
Pin Count
20
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
20
Ext Interrupts
3
Usb Speed
No
Usb Interface
No
Spi
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
3
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.25
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 125
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
1
Output Compare Channels
8
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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12. Power Stage Controller – (PSCn)
12.1
12.2
7734P–AVR–08/10
Features
Overview
The Power Stage Controller is a high performance waveform controller.
The AT90PWM81 includes one PSC2 block.
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Many register and bit references in this section are written in general form.
The purpose of a Power Stage Controller (PSC) is to control power modules on a board. It has two outputs
on PSCn and four outputs on PSC2.
These outputs can be used in various ways:
Each PSC has two inputs the purpose of which is to provide means to act directly on the generated
waveforms:
The PSC can be chained and synchronized to provide a configuration to drive three half bridges. Thanks
to this feature it is possible to generate a three phase waveforms for applications such as Asynchronous or
BLDC motor drive.
• A lower case “n” replaces the PSC number, in this case 2. However, when using the register or bit
• A lower case “x” replaces the PSC part , in this case A or B. However, when using the register or bit
• “Two Outputs” to drive a half bridge (lighting, DC motor ...)
• “One Output” to drive single power transistor (DC/DC converter, PFC, DC motor ...)
• “Four Outputs” in the case of PSC2 to drive a full bridge (lighting, DC motor ...)
• Current sensing regulation
• Zero crossing retriggering
• Demagnetization retriggering
• Fault input
PWM waveform generation function (2 complementary programmable outputs)
Dead time control
Standard mode up to 12 bit resolution
Frequency and pulse width Resolution Enhancement Mode (12 + 4 bits)
Frequency up to 64 Mhz
Conditional Waveform on External Events (Zero Crossing, Current Sensing ...)
All on chip PSC synchronization
ADC synchronization with digital delay register
Input Blanking
Overload protection function
Abnormality protection function, emergency input to force all outputs to high impedance or in inactive state
(fuse configurable)
Center aligned and edge aligned modes synchronization
Fast emergency stop by hardware
defines in a program, the precise form must be used, i.e., PSOC2 for accessing PSC 2 Synchro and
Output Configuration register and so on.
defines in a program, the precise form must be used, i.e., PFRC2A for accessing PSC n Fault/Retrigger
2 A Control register and so on.
AT90PWM81
99
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