ATMEGA164A-MCHR Atmel, ATMEGA164A-MCHR Datasheet - Page 36
![IC MCU AVR 16K 20MHZ 44QFN](/photos/12/32/123212/44mc-qfn_sml.jpg)
ATMEGA164A-MCHR
Manufacturer Part Number
ATMEGA164A-MCHR
Description
IC MCU AVR 16K 20MHZ 44QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA164A-MCHR.pdf
(581 pages)
Specifications of ATMEGA164A-MCHR
Package / Case
44-VQFN Exposed Pad
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Speed
20MHz
Number Of I /o
32
Eeprom Size
512 x 8
Core Processor
AVR
Program Memory Type
FLASH
Ram Size
1K x 8
Program Memory Size
16KB (16K x 8)
Data Converters
A/D 8x10b
Oscillator Type
Internal
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Connectivity
I²C, SPI, UART/USART
Core Size
8-Bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 36 of 581
- Download datasheet (27Mb)
8272A–AVR–01/10
Ce - is optional external capacitors as described in
Ci - is is the pin capacitance in
CL - is the load capacitance for a 32.768 kHz crystal specified by the crystal vendor.
C
Crystals specifying load capacitance (CL) higher than the ones given in the
35, require external capacitors applied as described in
Figure 8-3.
Crystals specifying load capacitance (CL) higher than listed in
external capacitors applied as described in
To find suitable load capacitance for a 32.768 kHz crysal, please consult the crystal datasheet.
When this oscillator is selected, start-up times are determined by the SUT Fuses and CKSEL0
as shown in
Table 8-9.
Note:
164A/164PA/324A/324PA/644A/644PA/1284/1284P
Power Conditions
BOD enabled
Fast rising power
Slowly rising power
BOD enabled
Fast rising power
Slowly rising power
S
- is the total stray capacitance for one TOSC pin.
1. These options should only be used if frequency stability at start-up is not important for the
application.
Table
Crystal Oscillator Connections
Start-up Times for the Low Frequency Crystal Oscillator Clock Selection
8-9.
Start-up Time from
Power-down and
Table 8-8 on page 35
Reserved
Reserved
Power-save
32K CK
32K CK
32K CK
1K CK
1K CK
1K CK
Figure 8-2 on page
Figure 8-2 on page 32
Additional Delay
14CK + 4.1 ms
14CK + 65 ms
Figure 8-2 on page
14CK + 4.1 ms
14CK + 65 ms
(V
from Reset
CC
14CK
14CK
= 5.0V)
32.
(1)
Table 8-8 on page
(1)
(1)
32.
CKSEL0
Table 8-8 on page
0
0
0
0
1
1
1
1
35, require
SUT1..0
00
01
10
11
00
01
10
11
36
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