ATMEGA128-16AI Atmel, ATMEGA128-16AI Datasheet - Page 39

IC AVR MCU 128K 16MHZ 64-TQFP

ATMEGA128-16AI

Manufacturer Part Number
ATMEGA128-16AI
Description
IC AVR MCU 128K 16MHZ 64-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets

Specifications of ATMEGA128-16AI

Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
EBI/EMI, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
128KB (64K x 16)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
For Use With
ATSTK501 - ADAPTER KIT FOR 64PIN AVR MCU
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
Q1167170A

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Low-frequency
Crystal Oscillator
2467V–AVR–02/11
Table 9. Start-up Times for the Crystal Oscillator Clock Selection
Notes:
To use a 32.768kHz watch crystal as the clock source for the device, the Low-frequency Crystal
Oscillator must be selected by setting the CKSEL fuses to “1001”. The crystal should be con-
nected as shown in
capacitors on XTAL1 and XTAL2, thereby removing the need for external capacitors. The inter-
nal capacitors have a nominal value of 36pF.
When this Oscillator is selected, start-up times are determined by the SUT fuses as shown in
Table
Table 10. Start-up Times for the Low-frequency Crystal Oscillator Clock Selection
Note:
CKSEL0
SUT1..0
00
01
10
11
0
0
0
0
1
1
1
1
10.
1. These options should only be used when not operating close to the maximum frequency of the
2. These options are intended for use with ceramic resonators and will ensure frequency stability
1. These options should only be used if frequency stability at start-up is not important for the
device, and only if frequency stability at start-up is not important for the application. These
options are not suitable for crystals.
at start-up. They can also be used with crystals when not operating close to the maximum fre-
quency of the device, and if frequency stability at start-up is not important for the application.
application.
SUT1..0
Start-up Time from
Power-down and
00
01
10
11
00
01
10
11
Power-save
1K CK
1K CK
32K CK
Figure
Start-up Time from
(1)
(1)
Power-down and
Power-save
19. By programming the CKOPT fuse, the user can enable internal
258 CK
258 CK
1K CK
1K CK
1K CK
16K CK
16K CK
16K CK
(2)
(2)
(2)
(1)
(1)
Additional Delay
(V
from Reset
CC
4.1ms
65ms
65ms
= 5.0V)
Reserved
Additional Delay
(V
from Reset
CC
4.1ms
4.0ms
4.1ms
65ms
65ms
65ms
= 5.0V)
Recommended Usage
Fast rising power or BOD enabled
Slowly rising power
Stable frequency at start-up
Recommended Usage
Ceramic resonator, fast
rising power
Ceramic resonator,
slowly rising power
Ceramic resonator,
BOD enabled
Ceramic resonator, fast
rising power
Ceramic resonator,
slowly rising power
Crystal Oscillator, BOD
enabled
Crystal Oscillator, fast
rising power
Crystal Oscillator,
slowly rising power
ATmega128
39

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