atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 320

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

26. ATmega32/64/M1/C1 Typical Characteristics
320
ATmega32/64/M1/C1
Table 25-3.
Notes:
All DC characteristics contained in this datasheet are based on simulations and characterization
of similar devices in the same process and design methods. These values are preliminary repre-
senting design targets, and will be updated after characterization of actual automotive silicon
data.
The following charts show typical behavior. These figures are not tested during manufacturing.
All current consumption measurements are performed with all I/O pins configured as inputs and
with internal pull-ups enabled. A sine wave generator with rail-to-rail output is used as clock
source.
All Active- and Idle current consumption measurements are done with all bits in the PRR register
set and thus, the corresponding I/O modules are turned off. Also the Analog Comparator is dis-
abled during these measurements.
the additional current consumption compared to I
trolled by the Power Reduction Register. See “Power Reduction Register” on page 37 for details.
The power consumption in Power-down mode is independent of clock selection.
The current consumption is a function of several factors such as: operating voltage, operating
frequency, loading of I/O pins, switching rate of I/O pins, code executed and ambient tempera-
ture. The dominating factors are operating voltage and frequency.
The current drawn from capacitive loaded pins may be estimated (for one pin) as C
C
The parts are characterized at frequencies higher than test limits. Parts are not guaranteed to
function properly at frequencies higher than the ordering code indicates.
The difference between current consumption in Power-down mode with Watchdog Timer
enabled and Power-down mode with Watchdog Timer disabled represents the differential cur-
rent drawn by the Watchdog Timer.
Symbol
t
t
t
t
L
XLOL
BVDV
OLDV
OHDZ
= load capacitance, V
1.
2. t
commands.
t
WLRH_CE
WLRH
Parameter
XTAL1 Low to OE Low
BS1 Valid to DATA valid
OE Low to DATA Valid
OE High to DATA Tri-stated
Parallel Programming Characteristics, V
is valid for the Write Flash, Write EEPROM, Write Fuse bits and Write Lock bits
is valid for the Chip Erase command.
CC
= operating voltage and f = average switching frequency of I/O pin.
Table 26-1 on page 325
CC
Active and I
CC
= 5V ± 10% (Continued)
and
Min.
CC
0
0
Table 26-2 on page 325
Idle for every I/O module con-
Typ.
Max.
250
250
250
7647A–AVR–02/08
L
*
V
CC
*f where
Units
ns
ns
ns
ns
show