ATMEGA88-20AJ Atmel, ATMEGA88-20AJ Datasheet - Page 102

IC MCU AVR 8K 5V 20MHZ 32-TQFP

ATMEGA88-20AJ

Manufacturer Part Number
ATMEGA88-20AJ
Description
IC MCU AVR 8K 5V 20MHZ 32-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets

Specifications of ATMEGA88-20AJ

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
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ATMEGA88-24AJ
ATMEGA88-24AJ

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA88-20AJ
Manufacturer:
Atmel
Quantity:
10 000
102
ATmega48/88/168
Note:
Table 14-7
rect PWM mode.
Table 14-7.
Note:
• Bits 3, 2 – Res: Reserved Bits
These bits are reserved bits in the ATmega48/88/168 and will always read as zero.
• Bits 1:0 – WGM01:0: Waveform Generation Mode
Combined with the WGM02 bit found in the TCCR0B Register, these bits control the counting
sequence of the counter, the source for maximum (TOP) counter value, and what type of wave-
form generation to be used, see
unit are: Normal mode (counter), Clear Timer on Compare Match (CTC) mode, and two types of
Pulse Width Modulation (PWM) modes (see
Table 14-8.
Notes:
Mode
COM0B1
0
1
2
3
4
5
6
7
0
0
1
1
1. A special case occurs when OCR0B equals TOP and COM0B1 is set. In this case, the Com-
1. A special case occurs when OCR0B equals TOP and COM0B1 is set. In this case, the Com-
1. MAX
2. BOTTOM = 0x00
WGM02
pare Match is ignored, but the set or clear is done at TOP. See
for more details.
pare Match is ignored, but the set or clear is done at TOP. See
page 96
shows the COM0B1:0 bit functionality when the WGM02:0 bits are set to phase cor-
0
0
0
0
1
1
1
1
Compare Output Mode, Phase Correct PWM Mode
Waveform Generation Mode Bit Description
COM0B0
for more details.
= 0xFF
0
1
0
1
WGM01
0
0
1
1
0
0
1
1
Description
Normal port operation, OC0B disconnected.
Reserved
Clear OC0B on Compare Match when up-counting. Set OC0B on
Compare Match when down-counting.
Set OC0B on Compare Match when up-counting. Clear OC0B on
Compare Match when down-counting.
Table
WGM00
0
1
0
1
0
1
0
1
14-8. Modes of operation supported by the Timer/Counter
Timer/Counter
Mode of
Operation
Normal
PWM, Phase
Correct
CTC
Fast PWM
Reserved
PWM, Phase
Correct
Reserved
Fast PWM
“Modes of Operation” on page
OCRA
OCRA
OCRA
0xFF
0xFF
0xFF
TOP
(1)
“Phase Correct PWM Mode” on
“Fast PWM Mode” on page 95
Update of
Immediate
Immediate
BOTTOM
BOTTOM
OCRx at
TOP
TOP
93).
2545S–AVR–07/10
Set on
TOV Flag
BOTTOM
BOTTOM
MAX
MAX
MAX
TOP
(1)(2)

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