ATmega16HVB Atmel Corporation, ATmega16HVB Datasheet - Page 27

• 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

9.2.2
9.2.3
8042D–AVR–10/11
Slow RC oscillator
Ultra Low Power RC oscillator
Table 9-2.
Notes:
The Slow RC Oscillator provides a 131kHz clock (typical value, refer to section
acteristics” on page
be used as a timing reference for run-time calibration of the Fast RC Oscillator and for accu-
rately determining the actual ULP Oscillator frequency, refer to
interface” on page 29
To provide good accuracy when used as a timing reference, the Slow RC Oscillator has calibra-
tion bytes stored in the signature address space, refer to section
from software” on page 195
a function of temperature is given by:
where T is the die temperature in Kelvin and T
nature row. The die temperature can be found using the Voltage ADC, refer to section
ADC – 7-channel general purpose 12-bit Sigma-Delta ADC” on page 116
The Ultra Low Power RC Oscillator (ULP Oscillator) provides a 128kHz clock (typical value, refer
to section
Watchdog Timer and Battery Protection modules. The actual ULP Oscillator frequency depends
on process variations and temperature, see
tor is automatically enabled in all operational modes. It is also enabled during reset. There are
three alternative methods for determining the actual clock period of the ULP Oscillator:
1. To determine the accurate clock period as a function of die temperature, if needed by the
2. An alternative method to determine the accurate clock period as a function of die temper-
application, the Oscillator Sampling Interface should be used. Refer to section
Oscillator sampling interface” on page 29
ature, is to read calibration bytes from the signature address space and calculate the
clock period as a function of die temperature, refer to section
from software” on page 195
in µs as a function of temperature is given by:
SUT2:0
111
101
110
1. The device is shipped with this option selected.
2. The actual value of the added, selectable 4ms - 512ms delay depends on the actual frequency
(1)
”Electrical characteristics” on page
of the
tics” on page
Slow RC period
ULP RC period
Start-up times for the calibrated Fast RC Oscillator clock selection. (Continued)
“Ultra Low Power RC oscillator”
225). This oscillator provides the clock for the CC-ADC module. It can also
for details.
Start-up time from
225.
power-save
=
for details. The actual clock period of the Slow RC Oscillator in μs as
=
6 CK
6 CK
6 CK
Slow RC word - Slow RC temp prediction word
----------------------------------------------------------------------------------------------------------------------------------------------------------- -
ULP RC word - ULP RC temp prediction word
---------------------------------------------------------------------------------------------------------------------------------------------------------
for details. The actual clock period of the ULP RC Oscillator
”Electrical characteristics” on page
HOT
for details.
. See
225). This oscillator provides the clock for the
Additional delay from reset, typical values
is the calibration temperature stored in the sig-
Table 9-3 on page 28
ATmega16HVB/32HVB
1024
1024
14 CK + 128ms
14 CK + 256ms
14 CK + 512ms
”Reading the signature row
”OSI – Oscillator sampling
”Reading the signature row
and
⋅
⋅
(T T
-------------------------- -
(T T
-------------------------- -
for details.
–
”Electrical characteris-
–
64
64
HOT
HOT
225. The Oscilla-
”Electrical char-
)
)
”OSI –
”Voltage
(2)
27