ATMEGA162V-1MC Atmel, ATMEGA162V-1MC Datasheet - Page 36

• Manufacturer Part Number: ATMEGA162V-1MC
• Description: IC MCU AVR 16K 1.8V 8MHZ 44-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA162V-1MC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 1MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 35
• 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): 1.8 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-VQFN Exposed Pad
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

Low-frequency Crystal
Oscillator
36
ATmega162(V/U/L)
Table 8. Start-up Times for the Crystal Oscillator Clock Selection (Continued)
Notes:
To use a 32.768 kHz watch crystal as the clock source for the device, the Low-fre-
quency Crystal Oscillator must be selected by setting the CKSEL Fuses to “0100”,
“0101”, “0110” or “0111”. The crystal should be connected as shown in Figure 19. If
CKSEL equals “0110” or “0111”, the internal capacitors on XTAL1 and XTAL2 are
enabled, thereby removing the need for external capacitors. The internal capacitors
have a nominal value of 10 pF.
When this Oscillator is selected, start-up times are determined by the SUT Fuses (real
time-out from Reset) and CKSEL0 (number of clock cycles) as shown in Table 9 and
Table 10.
Table 9. Start-up Delay from Reset when Low-frequency Crystal Oscillator is Selected
Table 10. Start-up Times for the Low-frequency Crystal Oscillator Clock Selection
Note:
CKSEL0
CKSEL1:0
SUT1:0
00
01
10
11
00
10
1
1
1
01
11
(1)
(1)
1. These options should only be used when not operating close to the maximum fre-
2. These options are intended for use with ceramic resonators and will ensure fre-
1. These options should only be used if frequency stability at start-up is not important for
quency of the device, and only if frequency stability at start-up is not important for the
application. These options are not suitable for crystals.
quency stability at start-up. They can also be used with crystals when not operating
close to the maximum frequency of the device, and if frequency stability at start-up is
not important for the application.
the application.
Additional Delay from Reset (V
SUT1:0
Internal Capacitors
01
10
11
Enabled?
Yes
Yes
No
No
Start-up Time from
Power-down and
Power-save
16K CK
16K CK
16K CK
4.1 ms
65 ms
0 ms
Start-up Time from
Power-down and
Power-save
CC
32K CK
32K CK
1K CK
1K CK
= 5.0V)
Reserved
Additional Delay from
Reset (V
4.1 ms
65 ms
Recommended Usage
Fast rising power or BOD enabled
Fast rising power or BOD enabled
Slowly rising power
CC
–
= 5.0V)
Recommended Usage
Stable Frequency at start-up
Stable Frequency at start-up
Recommended
Usage
Crystal Oscillator,
BOD enabled
Crystal Oscillator,
fast rising power
Crystal Oscillator,
slowly rising power
2513C–AVR–09/02