ATmega32A Datasheet - Sunrom Technologies

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<strong>ATmega32A</strong>• MOSI – Port B, Bit 5MOSI: SPI Master Data output, Slave Data input for SPI. When the SPI is enabled as a Slave,this pin is configured as an input regardless of the setting of DDB5. When the SPI is enabled asa Master, the data direction of this pin is controlled by DDB5. When the pin is forced by the SPIto be an input, the pull-up can still be controlled by the PORTB5 bit.• SS – Port B, Bit 4SS: Slave Select input. When the SPI is enabled as a Slave, this pin is configured as an inputregardless of the setting of DDB4. As a Slave, the SPI is activated when this pin is driven low.When the SPI is enabled as a Master, the data direction of this pin is controlled by DDB4. Whenthe pin is forced by the SPI to be an input, the pull-up can still be controlled by the PORTB4 bit.• AIN1/OC0 – Port B, Bit 3AIN1, Analog Comparator Negative Input. Configure the port pin as input with the internal pull-upswitched off to avoid the digital port function from interfering with the function of the analogcomparator.OC0, Output Compare Match output: The PB3 pin can serve as an external output for theTimer/Counter0 Compare Match. The PB3 pin has to be configured as an output (DDB3 set(one)) to serve this function. The OC0 pin is also the output pin for the PWM mode timerfunction.• AIN0/INT2 – Port B, Bit 2AIN0, Analog Comparator Positive input. Configure the port pin as input with the internal pull-upswitched off to avoid the digital port function from interfering with the function of the AnalogComparator.INT2, External Interrupt Source 2: The PB2 pin can serve as an external interrupt source to theMCU.• T1 – Port B, Bit 1T1, Timer/Counter1 Counter Source.• T0/XCK – Port B, Bit 0T0, Timer/Counter0 Counter Source.XCK, USART External Clock. The Data Direction Register (DDB0) controls whether the clock isoutput (DDB0 set) or input (DDB0 cleared). The XCK pin is active only when the USART operatesin Synchronous mode.Table 12-7 and Table 12-8 relate the alternate functions of Port B to the overriding signalsshown in Figure 12-5 on page 56. SPI MSTR INPUT and SPI SLAVE OUTPUT constitute theMISO signal, while MOSI is divided into SPI MSTR OUTPUT and SPI SLAVE INPUT.8155C–AVR–02/1160
<strong>ATmega32A</strong>Table 12-7.Overriding Signals for Alternate Functions in PB7:PB4SignalName PB7/SCK PB6/MISO PB5/MOSI PB4/SSPUOE SPE • MSTR SPE • MSTR SPE • MSTR SPE • MSTRPUOV PORTB7 • PUD PORTB6 • PUD PORTB5 • PUD PORTB4 • PUDDDOE SPE • MSTR SPE • MSTR SPE • MSTR SPE • MSTRDDOV 0 0 0 0PVOE SPE • MSTR SPE • MSTR SPE • MSTR 0PVOV SCK OUTPUT SPI SLAVE OUTPUT SPI MSTR OUTPUT 0DIEOE 0 0 0 0DIEOV 0 0 0 0DI SCK INPUT SPI MSTR INPUT SPI SLAVE INPUT SPI SSAIO – – – –Table 12-8.Overriding Signals for Alternate Functions in PB3:PB0SignalName PB3/OC0/AIN1 PB2/INT2/AIN0 PB1/T1 PB0/T0/XCKPUOE 0 0 0 0PUOV 0 0 0 0DDOE 0 0 0 0DDOV 0 0 0 0PVOE OC0 ENABLE 0 0 UMSELPVOV OC0 0 0 XCK OUTPUTDIEOE 0 INT2 ENABLE 0 0DIEOV 0 1 0 0DI – INT2 INPUT T1 INPUT XCK INPUT/T0 INPUTAIO AIN1 INPUT AIN0 INPUT – –8155C–AVR–02/1161
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ATmega32A2. OverviewThe Atmel ® AV
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ATmega32Ametrical drive characteris
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Page 11 and 12: ATmega32A6.4.1 The X-register, Y-re
Page 13 and 14: ATmega32AFigure 6-5.Single Cycle AL
Page 15: ATmega32AA return from an interrupt
Page 18 and 19: ATmega32AFigure 7-2.Data Memory Map
Page 20 and 21: ATmega32AEEPROM data corruption can
Page 22 and 23: ATmega32ASupport - Read-While-Write
Page 24 and 25: ATmega32AThe next code examples sho
Page 26 and 27: ATmega32A8.1.3 Flash Clock - clk FL
Page 28 and 29: ATmega32AThe CKSEL0 Fuse together w
Page 30 and 31: ATmega32A8.7 Calibrated Internal RC
Page 32 and 33: ATmega32A8.10 Register Description8
Page 34 and 35: ATmega32Aface, Timer/Counters, Watc
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Page 42 and 43: ATmega32AADC is used. To reduce pow
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Page 50 and 51: ATmega32A12. I/O Ports12.1 Overview
Page 52 and 53: ATmega32AIf PORTxn is written logic
Page 54 and 55: ATmega32AThe following code example
Page 56 and 57: ATmega32AFigure 12-5. Alternate Por
Page 58 and 59: ATmega32ATable 12-3.Table 12-4 and
Page 62 and 63: ATmega32A12.3.3 Alternate Functions
Page 64 and 65: ATmega32ATable 12-11. Overriding Si
Page 66 and 67: ATmega32A12.4 Register Description1
Page 68 and 69: ATmega32A12.4.13 PIND - Port D Inpu
Page 70 and 71: ATmega32Alow level interrupt is sel
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Page 75 and 76: ATmega32ASignal description (intern
Page 77 and 78: ATmega32Athe OCR0 value, the compar
Page 79 and 80: ATmega32AFigure 14-5.CTC Mode, Timi
Page 81 and 82: ATmega32AThe PWM resolution for the
Page 83 and 84: ATmega32AFigure 14-9. Timer/Counter
Page 85 and 86: ATmega32ATable 14-2. Waveform Gener
Page 87 and 88: ATmega32AThe Output Compare Registe
Page 89 and 90: ATmega32AFigure 15-1.T1/T0 Pin Samp
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Page 93 and 94: ATmega32Aput Compare Units” on pa
Page 95 and 96: ATmega32Athe main code and the inte
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Page 103 and 104: ATmega32AA change of the COM1x1:0 b
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ATmega32AUsing the ICR1 Register fo
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ATmega32ATable 16-3 shows the COM1x
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ATmega32A• Bit 7 - ICNC1: Input C
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ATmega32AThe Input Capture is updat
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ATmega32A17. 8-bit Timer/Counter2 w
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ATmega32AFigure 17-2.DATA BUSCounte
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ATmega32AThe setup of the OC2 shoul
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ATmega32AFigure 17-5.CTC Mode, Timi
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ATmega32A17.7.4 Phase Correct PWM M
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ATmega32AFigure 17-9. Timer/Counter
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ATmega32A• If Timer/Counter2 is u
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ATmega32AA FOC2 strobe will not gen
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ATmega32A17.11.2 TCNT2 - Timer/Coun
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ATmega32A17.11.7 SFIOR - Special Fu
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ATmega32Acommunication cycle when p
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ATmega32AAssembly Code Example (1)S
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ATmega32A18.3 SS Pin Functionality1
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ATmega32A18.3.4 SPSR - SPI Status R
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ATmega32A19. USART19.1 Features19.2
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ATmega32A19.2.1 AVR USART vs. AVR U
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ATmega32ATable 19-1.Operating ModeA
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ATmega32AThe frame format used by t
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ATmega32AThe following code example
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ATmega32AThe Transmit Complete (TXC
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ATmega32AAssembly Code Example (1)U
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ATmega32AThe PE bit is set if the n
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ATmega32AFigure 19-7.Stop Bit Sampl
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ATmega32AIf the receiver is set up
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ATmega32AThe following code example
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ATmega32A• Bit 0 - MPCM: Multi-pr
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ATmega32ATable 19-6.USBS Bit Settin
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ATmega32ATable 19-9.BaudRate(bps)Ex
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ATmega32ATable 19-11.BaudRate(bps)E
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ATmega32A20. Two-wire Serial Interf
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ATmega32Acondition is issued betwee
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ATmega32AFigure 20-6.Typical Data T
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ATmega32AFigure 20-9.Overview of th
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ATmega32A20.6 Using the TWIThe AVR
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ATmega32AAssembly code example C ex
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ATmega32ATable 20-2.Status Code(TWS
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ATmega32AFigure 20-12. Formats and
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ATmega32AThe upper seven bits are t
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ATmega32AFigure 20-16. Formats and
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ATmega32A4. The transfer must be fi
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ATmega32A20.9.2 TWCR - TWI Control
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ATmega32A20.9.5 TWAR - TWI (Slave)
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ATmega32A21.3 Register Description2
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ATmega32A22. Analog to Digital Conv
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ATmega32AIf differential channels a
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ATmega32Ain ADCSRA. The prescaler k
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ATmega32ATable 22-1.ConditionADC Co
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ATmega32AIf the user has a fixed vo
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ATmega32AFigure 22-9.ADC Power Conn
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INLATmega32AFigure 22-12. Integral
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ATmega32ATable 22-2.Correlation bet
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ATmega32ATable 22-4.MUX4:011010 ADC
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ATmega32A22.9.4 SFIOR - Special Fun
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ATmega32A• TMS: Test Mode Select.
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ATmega32AThe TMS input must be held
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ATmega32A23.8 Using the JTAG Progra
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ATmega32A24.3.1 Bypass RegisterThe
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ATmega32AThe active states are:•
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ATmega32AFigure 24-4. General Port
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ATmega32AFigure 24-7.Boundary-scan
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ATmega32ATable 24-4.SignalNameBound
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ATmega32ATable 24-5.SignalNameBound
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ATmega32ATable 24-6.Algorithm for U
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ATmega32ATable 24-7. ATmega32A Boun
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ATmega32ATable 24-7. ATmega32A Boun
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ATmega32A25. Boot Loader Support -
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ATmega32AFigure 25-1.Read-While-Wri
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ATmega32Amemory by SPM instruction.
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ATmega32ANotes: 1. The different va
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ATmega32A25.8.8 EEPROM Write Preven
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ATmega32Asbiw loophi:looplo, 2brne
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ATmega32A25.9 Register Description2
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ATmega32A26. Memory Programming26.1
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ATmega32ATable 26-4.Fuse Low ByteFu
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ATmega32ATable 26-7.Signal Name inP
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ATmega32Achanged. A Chip Erase must
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ATmega32AFigure 26-3. Programming t
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ATmega32A3. Set BS1 to “0” and
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ATmega32A26.7.14 Parallel Programmi
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ATmega32A26.9 SPI Serial Programmin
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ATmega32Awithout chip erasing the d
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ATmega32A26.9.4 SPI Serial Programm
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ATmega32A• Update-DR: The program
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ATmega32AFigure 26-14. Programming
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ATmega32AFigure 26-15. JTAG Program
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ATmega32AFigure 26-17. Virtual Flas
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ATmega32A26.10.18 Reading the Flash
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ATmega32A27. Electrical Characteris
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ATmega32A27.3 Speed GradesFigure 27
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ATmega32Aantees that a Brown-out Re
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ATmega32ATable 27-3. SPI Timing Par
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ATmega32ATable 27-5. ADC Characteri
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ATmega32A28. Typical Characteristic
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ATmega32AFigure 28-4.Active Supply
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ATmega32AFigure 28-8.Idle Supply Cu
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ATmega32AFigure 28-12. Idle Supply
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ATmega32A28.5 Standby Supply Curren
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ATmega32AFigure 28-20. Reset Pull-u
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ATmega32AFigure 28-24. I/O Pin Sink
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ATmega32AFigure 28-28. Reset Input
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ATmega32AFigure 28-32. BOD Threshol
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ATmega32AFigure 28-36. Calibrated 8
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ATmega32AFigure 28-48. ADC Current
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ATmega32A28.12 Current Consumption
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ATmega32A29. Register SummaryAddres
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ATmega32A30. Instruction Set Summar
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ATmega32AMnemonics Operands Descrip
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ATmega32A32. Packaging Information3
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ATmega32A32.3 44M1DMarked Pin# 1 ID
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ATmega32A34. Datasheet Revision His
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ATmega32A8.9 Timer/Counter Oscillat
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ATmega32A18.2 Overview ............
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ATmega32A26 Memory Programming ....
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Atmel Corporation2325 Orchard Parkw
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ATmega32A Datasheet - Sunrom Technologies

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