ATmega32A Atmel Corporation, ATmega32A Datasheet - Page 66

• Manufacturer Part Number: ATmega32A
• Manufacturer: Atmel Corporation

Specifications of ATmega32A

• Flash (kbytes): 32 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 32
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

12.4
12.4.1
12.4.2
12.4.3
12.4.4
8155C–AVR–02/11
Register Description
SFIOR – Special Function I/O Register
PORTA – Port A Data Register
DDRA – Port A Data Direction Register
PINA – Port A Input Pins Address
Table 12-14. Overriding Signals for Alternate Functions in PD3:PD0
• Bit 2 – PUD: Pull-up disable
When this bit is written to one, the pull-ups in the I/O ports are disabled even if the DDxn and
PORTxn Registers are configured to enable the pull-ups ({DDxn, PORTxn} = 0b01). See
figuring the Pin” on page 51
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
ADTS2
PORTA7
PINA7
R/W
DDA7
R/W
R/W
N/A
7
0
R
7
0
7
0
7
PD3/INT1
0
0
0
0
0
0
INT1 ENABLE
1
INT1 INPUT
–
PORTA6
ADTS1
PINA6
DDA6
R/W
R/W
R/W
N/A
R
6
0
6
0
6
6
0
for more details about this feature.
PORTA5
PINA5
DDA5
ADTS0
R/W
R/W
N/A
R/W
5
0
R
5
0
5
5
0
PD2/INT0
0
0
0
0
0
0
INT0 ENABLE
1
INT0 INPUT
–
PORTA4
PINA4
DDA4
R/W
R/W
N/A
4
0
R
4
0
4
R
4
–
0
PORTA3
PINA3
DDA3
R/W
R/W
N/A
ACME
3
0
R
3
0
3
R/W
3
0
PORTA2
PD1/TXD
TXEN
0
TXEN
1
TXEN
TXD
0
0
–
–
PINA2
DDA2
R/W
R/W
N/A
2
0
R
PUD
2
0
2
R/W
2
0
PORTA1
PINA1
DDA1
R/W
R/W
PSR2
N/A
R/W
1
0
R
1
0
1
ATmega32A
1
0
PD0/RXD
0
0
0
0
RXEN
PORTD0 • PUD
RXEN
0
RXD
–
PORTA0
PSR10
PINA0
DDA0
R/W
R/W
R/W
N/A
0
0
R
0
0
0
0
0
SFIOR
PORTA
DDRA
PINA
“Con-
66