ATMEGA329P-20MU Atmel, ATMEGA329P-20MU Datasheet - Page 30

IC MCU 32K 4X25 LCD CTRL 64-QFN

ATMEGA329P-20MU

Manufacturer Part Number
ATMEGA329P-20MU
Description
IC MCU 32K 4X25 LCD CTRL 64-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets

Specifications of ATMEGA329P-20MU

Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
54
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K 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-MLF®, 64-QFN
Processor Series
ATMEGA32x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
2 KB
Interface Type
SPI, USART, USI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
54
Number Of Timers
3
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
For Use With
ATSTK600-TQFP64 - STK600 SOCKET/ADAPTER 64-TQFP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEM
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ATMEGA329P-16MU
ATMEGA329P-16MU
8.5
8021G–AVR–03/11
Low-frequency Crystal Oscillator
Table 8-4.
Notes:
The Low-frequency Crystal Oscillator is optimized for use with a 32.768kHz watch crystal. When
selecting crystals, load capacitance and crystal’s Equivalent Series Resistance, ESR must be
taken into consideration. Both values are specified by the crystal vendor.
ATmega329P/3290P oscillator is optimized for very low power consumption, and thus when
selecting crystals, see
12.5pF crystals.
Table 8-5.
Note:
The Low-frequency Crystal Oscillator provides an internal load capacitance,
page 30
Table 8-6.
CKSEL0
ATmega329P/3290P
0
1
1
1
1
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. Maximum ESR is typical value based on characterization
at each TOSC pin.
Device
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.
SUT1..0
Start-up Times for the Crystal Oscillator Clock Selection (Continued)
Maximum ESR Recommendation for 32.768kHz Watch Crystal
ATmega329P/3290P
Capacitance for Low-frequency Oscillator
11
00
01
10
11
Crystal CL (pF)
12.5
6.5
9.0
Table 8-5
Start-up Time from
Power-down and
Power-save
32kHz Osc. Type
1K CK
1K CK
16K CK
16K CK
16K CK
System Osc.
Timer Osc.
for maximum ESR recommendations on 6.5pF, 9.0pF and
(2)
(2)
Additional Delay
14CK + 4.1ms
14CK + 4.1ms
14CK + 65ms
14CK + 65ms
Cap(Xtal1/Tosc1)
(V
from Reset
CC
14CK
ATmega329P/3290P
= 5.0V)
16pF
16pF
Max ESR [kΩ]
75
65
30
Ceramic resonator, fast
rising power
Ceramic resonator,
slowly rising power
Crystal Oscillator, BOD
enabled
Crystal Oscillator, fast
rising power
Crystal Oscillator,
slowly rising power
Recommended Usage
Cap(Xtal2/Tosc2)
(1)
seeTable 8-6 on
6pF
6pF
30

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