ATmega16HVB Atmel Corporation, ATmega16HVB Datasheet - Page 206

• Manufacturer Part Number: ATmega16HVB
• Manufacturer: Atmel Corporation

Specifications of ATmega16HVB

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 8 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 17
• Ext Interrupts: 15
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 4.0 to 25
• Operating Voltage (vcc): 4.0 to 25
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

30.2.2
30.2.3
30.3
206
Signature bytes
ATmega16HVB/32HVB
Low byte
Latching of fuses
Table 30-4.
Notes:
The status of the Fuse bits is not affected by Chip Erase. Note that the Fuse bits are locked if
Lock bit1 (LB1) is programmed. Program the Fuse bits before programming the Lock bits.
The fuse values are latched when the device enters programming mode and changes of the
fuse values will have no effect until the part leaves Programming mode. This does not apply to
the EESAVE Fuse which will take effect once it is programmed. The fuses are also latched on
Power-up in Normal mode.
All Atmel microcontrollers have a three-byte signature code which identifies the device. This
code can be read in both Programming mode, also when the device is locked. The three bytes
reside in a separate address space. The signature bytes of the Atmel ATmega16HVB/32HVB is
given in
Table 30-5.
Part
The Atmel ATmega16HVB
The Atmel ATmega32HVB
Bit no
7
6
5
4
3
2
1
0
1. The Watchdog is enabled/disabling by writing to the Watchdog Timer Control and Status Reg-
2. The SUTx fuse bits are used to configure the startup time from sleep or reset. By default the
3. The default OSCSEL1:0 setting should not be changed. OSCSEL1:0="00" is reserved for test
Table
Fuse low byte
WDTON
EESAVE
SPIEN
SUT2
SUT1
SUT0
OSCSEL1
OSCSEL0
ister (WDTCSR). But as a fail-safe, the WDTON fuse can be used to force the Watchdog to run
in System Reset mode.
longest startup time is selected.
purpose. Other values are reserved for future use.
Fuse low byte.
30-5.
Device ID.
Watchdog Timer always on
EEPROM memory is preserved
through the chip erase
Enable serial programmable data
downloading
Select start-up time
Select start-up time
Select start-up time
Oscillator select
Oscillator select
Description
0x000
0x1E
0x1E
Signature bytes address
0x001
0x94
0x95
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
Default value
1 (unprogrammed, EEPROM
not preserved)
0 (programmed, SPI
programming enabled)
0 (programmed)
(3)
8042D–AVR–10/11
(1)
(2)
(2)
(2)
(3)
0x002
0x0D
0x10