ATAVRSB202 Atmel, ATAVRSB202 Datasheet - Page 27

• Manufacturer Part Number: ATAVRSB202
• Description: KIT BATT MGMT FOR ATMEGA32HVB
• Manufacturer: Atmel

Specifications of ATAVRSB202

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: *
• Primary Attributes: *
• Secondary Attributes: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.2.2
9.2.3
8042B–AVR–06/10
Slow RC Oscillator
Ultra Low Power RC Oscillator
When this Oscillator is selected, start-up times are determined by the SUT Fuses as shown in
Table 9-2 on page
Table 9-2.
Notes:
The Slow RC Oscillator provides a 131 kHz 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 199
as 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 117
The Ultra Low Power RC Oscillator (ULP Oscillator) provides a 128 kHz clock (typical value,
refer to section
the Watchdog Timer and Battery Protection modules. The actual ULP Oscillator frequency
depends on process variations and temperature, see
The Oscillator is automatically enabled in all operational modes. It is also enabled during reset.
There are two alternative methods for determining the actual clock period of the ULP Oscillator:
SUT2:0
111
000
001
010
011
100
101
110
1. The device is shipped with this option selected.
2. The actual value of the added, selectable 4- 512 ms delay depends on the actual frequency of
(1)
the
Characteristics” on page 230
Slow RC period
Start-up times for the calibrated Fast RC Oscillator clock selection
”Ultra Low Power RC Oscillator” on page
”Electrical Characteristics” on page
27.
230). This oscillator provides the clock for the CC-ADC module. It can also
for details.
Start-up Time from
Power-save
=
6 CK
6 CK
6 CK
6 CK
6 CK
6 CK
6 CK
6 CK
for details. The actual clock period of the Slow RC Oscillator in μs
Slow RC word - Slow RC temp prediction word
----------------------------------------------------------------------------------------------------------------------------------------------------------- -
HOT
Additional Delay from Reset, Typical Values
is the calibration temperature stored in the sig-
ATmega16HVB/32HVB
230). This oscillator provides the clock for
27. See
1024
”Electrical Characteristics” on page
Table 9-3 on page 28
14 CK + 128 ms
14 CK + 256 ms
14 CK + 512 ms
14 CK + 16 ms
14 CK + 32 ms
14 CK + 64 ms
14 CK + 4 ms
14 CK + 8 ms
”Reading the Signature Row
”OSI – Oscillator Sampling
⋅
(T T
-------------------------- -
for details.
–
64
HOT
”Electrical Char-
)
and
”Electrical
”Voltage
(2)
230.
27