ATMEGA165P-16ANR Atmel, ATMEGA165P-16ANR Datasheet - Page 28
![IC MCU AVR 16K 16MHZ 64TQFP](/photos/12/13/121332/313-64-tqfp_sml.jpg)
ATMEGA165P-16ANR
Manufacturer Part Number
ATMEGA165P-16ANR
Description
IC MCU AVR 16K 16MHZ 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA165P-16ANR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
54
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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7.3
7.4
8019K–AVR–11/10
Default Clock Source
Calibrated Internal RC Oscillator
The device is shipped with CKSEL = “0010”, SUT = “10”, and CKDIV8 programmed. The default
clock source setting is the Internal RC Oscillator with longest start-up time and an initial system
clock prescaling of 8. This default setting ensures that all users can make their desired clock
source setting using an In-System or Parallel programmer.
By default, the internal RC Oscillator provides an approximate 8.0 MHz clock. Though voltage
and temperature dependent, this clock can be very accurately calibrated by the user. See
26-2 on page 301
shipped with the CKDIV8 Fuse programmed. See
more details.
This clock may be selected as the system clock by programming the CKSEL Fuses as shown in
Table
the pre-programmed calibration value into the OSCCAL Register and thereby automatically cal-
ibrates the RC Oscillator. The accuracy of this calibration is shown as Factory calibration in
Table 26-2 on page
By changing the OSCCAL register from SW, see
page
The accuracy of this calibration is shown as User calibration in
When this Oscillator is used as the chip clock, the Watchdog Oscillator will still be used for the
Watchdog Timer and for the Reset Time-out. For more information on the pre-programmed cali-
bration value, see the section
Table 7-3.
Notes:
When this Oscillator is selected, start-up times are determined by the SUT Fuses as shown in
Table 7-4
Table 7-4.
Note:
Power Conditions
BOD enabled
Fast rising power
Slowly rising power
34, it is possible to get a higher calibration accuracy than by using the factory calibration.
7-3. If selected, it will operate with no external components. During reset, hardware loads
1. The device is shipped with this option selected.
2. The frequency ranges are preliminary values. Actual values are TBD.
3. If 8 MHz frequency exceeds the specification of the device (depends on V
1. The device is shipped with this option selected
Fuse can be programmed in order to divide the internal frequency by 8.
Internal Calibrated RC Oscillator Operating Modes
Start-up times for the internal calibrated RC Oscillator clock selection
Frequency Range
and
301.
“Internal Oscillator Speed” on page 335
7.3 - 8.1
Start-up Time from Power-
“Calibration Byte” on page
down and Power-save
(2)
(MHz)
Reserved
6 CK
6 CK
6 CK
“OSCCAL – Oscillator Calibration Register” on
“System Clock Prescaler” on page 33
.
269.
Additional Delay from
Reset (V
Table 26-2 on page
14CK + 65 ms
for more details. The device is
14CK + 4.1 ms
(1)(3)
14CK
ATmega165P
CC
CKSEL3..0
= 5.0V)
0010
(1)
CC
), the CKDIV8
301.
SUT1..0
00
01
10
11
Table
for
28
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