ATmega8HVA Atmel Corporation, ATmega8HVA Datasheet - Page 71

• Manufacturer Part Number: ATmega8HVA
• Manufacturer: Atmel Corporation

Specifications of ATmega8HVA

• Flash (kbytes): 8 Kbytes
• Pin Count: 28
• Max. Operating Frequency: 4 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 3
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 6
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 6
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 256
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -20 to 85
• I/o Supply Class: 1.8 to 9.0
• Operating Voltage (vcc): 1.8 to 9.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

15.3.2
8024A–AVR–04/08
Alternate Functions of Port B
The Port B pins with alternate functions are shown in
Table 15-5.
The alternate pin configuration is as follows:
• MISO/INT2 - Port B, Bit 3
MISO, Master Data input: Slave Data output pin for SPI channel. When the SPI is enabled as a
Master, this pin is configured as an input regardless of the setting of DDB3. When the SPI is
enabled as a Slave, the data direction of this pin is controlled by DDB3. When the pin is forced
by the SPI to be an input, the pull-up can still be controlled by the PORTB3 bit. When not operat-
ing in SPI mode, this pin can serve as an external interrupt source.
• MOSI/INT1- Port B, Bit 2
MOSI, SPI Master Data output: Slave Data input for SPI channel. When the SPI is enabled as a
Slave, this pin is configured as an input regardless of the setting of DDB2. When the SPI is
enabled as a Master, the data direction of this pin is controlled by DDB2. When the pin is forced
by the SPI to be an input, the pull-up can still be controlled by the PORTB2 bit. When not operat-
ing in SPI mode, this pin can serve as an external interrupt source.
• SCK- Port B, Bit 1
SCK, Master Clock output: Slave Clock input pin for SPI channel. When the SPI is enabled as a
Slave, this pin is configured as an input regardless of the setting of DDB1. When the SPI is
enabled as a Master, the data direction of this pin is controlled by DDB1. When the pin is forced
by the SPI to be an input, the pull-up can still be controlled by the PORTB1 bit.
• SS/CKOUT- Port B, Bit 0
SS, Slave Select input: When the SPI is enabled as a Slave, this pin is configured as an input
regardless of the setting of DDB0. 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 DDB0. When
the pin is forced by the SPI to be an input, the pull-up can still be controlled by the PORTB0 bit.
When not operating in SPI mode, this pin can serve as Clock Output, CPU Clock divided by 2.
See
Port Pin
PB3
PB2
PB1
PB0
”Clock Output” on page
Alternate Functions
MISO/ INT2 (SPI Bus Master Input/Slave Output or External Interrupt 2 Input)
MOSI/ INT1 (SPI Bus Master Output/Slave Input or External Interrupt 1 Input)
SCK (SPI Bus Master clock Input)
SS/ CKOUT (SPI Bus Master Slave select or Clock Output)
Port B Pins Alternate Functions
27.
Table
ATmega8HVA/16HVA
15-5.
71