ATMEGA88P-20AU Atmel, ATMEGA88P-20AU Datasheet - Page 35
ATMEGA88P-20AU
Manufacturer Part Number
ATMEGA88P-20AU
Description
MCU AVR 8K ISP FLSH 20MHZ 32TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA88P-20AU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
8KB (4K 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
32-TQFP, 32-VQFP
Processor Series
ATMEGA8x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
1 KB
Interface Type
2-Wire, SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
23
Number Of Timers
5
Operating Supply Voltage
2.7 V to 5.5 V
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, ATASTK512-EK1-IND
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Package
32TQFP
Device Core
AVR
Family Name
ATmega
Maximum Speed
20 MHz
Controller Family/series
AVR MEGA
No. Of I/o's
23
Eeprom Memory Size
512Byte
Ram Memory Size
1KB
Cpu Speed
20MHz
Rohs Compliant
Yes
For Use With
ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEM
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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8.7
8.8
8025L–AVR–7/10
128 kHz Internal Oscillator
External Clock
The 128 kHz internal Oscillator is a low power Oscillator providing a clock of 128 kHz. The fre-
quency is nominal at 3V and 25°C. This clock may be select as the system clock by
programming the CKSEL Fuses to “11” as shown in
Table 8-13.
Note:
When this clock source is selected, start-up times are determined by the SUT Fuses as shown in
Table
Table 8-14.
Note:
To drive the device from an external clock source, XTAL1 should be driven as shown in
8-4 on page
to “0000” (see
Table 8-15.
Figure 8-4.
When this clock source is selected, start-up times are determined by the SUT Fuses as shown in
Table
BOD enabled
Fast rising power
Slowly rising power
Power Conditions
8-14.
8-16.
1. Note that the 128 kHz oscillator is a very low power clock source, and is not designed for a
1. If the RSTDISBL fuse is programmed, this start-up time will be increased to
high accuracy.
14CK + 4.1 ms to ensure programming mode can be entered.
35. To run the device on an external clock, the CKSEL Fuses must be programmed
128 kHz Internal Oscillator Operating Modes
Start-up Times for the 128 kHz Internal Oscillator
Table
Crystal Oscillator Clock Frequency
External Clock Drive Configuration
Nominal Frequency
8-15).
Frequency
0 - 20 MHz
EXTERNAL
128 kHz
SIGNAL
CLOCK
Start-up Time from Power-
down and Power-save
NC
(1)
Reserved
6 CK
6 CK
6 CK
Table
ATmega48P/88P/168P
XTAL2
XTAL1
GND
8-13.
Additional Delay from
14CK + 64 ms
14CK + 4 ms
14CK
Reset
CKSEL[3:0]
CKSEL[3:0]
(1)
0011
0000
SUT[1:0]
Figure
00
01
10
11
35
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