ATMEGA164A-PU Atmel, ATMEGA164A-PU Datasheet - Page 156

IC MCU AVR 16K 20MHZ 40PDIP

ATMEGA164A-PU

Manufacturer Part Number
ATMEGA164A-PU
Description
IC MCU AVR 16K 20MHZ 40PDIP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets

Specifications of ATMEGA164A-PU

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
32
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Controller Family/series
Atmega
No. Of I/o's
32
Eeprom Memory Size
512Byte
Ram Memory Size
1KB
Cpu Speed
20MHz
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
164A/164PA/324A/324PA/644A/644PA/1284/1284P
Table 16-7
rect PWM mode.
Table 16-7.
COM2B1
0
0
1
1
Note:
• Bits 3:2 – Res: Reserved Bits
These bits are reserved bits in the ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P
and will always read as zero.
• Bits 1:0 – WGM21:0: Waveform Generation Mode
Combined with the WGM22 bit found in the TCCR2B 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 16-8.
Mode
0
1
2
3
4
5
6
7
Notes:
16.11.2
TCCR2B – Timer/Counter Control Register B
Bit
8272A–AVR–01/10
shows the COM2B1:0 bit functionality when the WGM22:0 bits are set to phase cor-
Compare Output Mode, Phase Correct PWM Mode
COM2B0
Description
0
Normal port operation, OC2B disconnected.
1
Reserved
Clear OC2B on Compare Match when up-counting. Set OC2B on
0
Compare Match when down-counting.
Set OC2B on Compare Match when up-counting. Clear OC2B on
1
Compare Match when down-counting.
1. A special case occurs when OCR2B equals TOP and COM2B1 is set. In this case, the Com-
pare Match is ignored, but the set or clear is done at TOP. See
page 148
for more details.
Table
16-8. Modes of operation supported by the Timer/Counter
Waveform Generation Mode Bit Description
Timer/Counter
Mode of
WGM2
WGM1
WGM0
Operation
0
0
0
Normal
PWM, Phase
0
0
1
Correct
0
1
0
CTC
0
1
1
Fast PWM
1
0
0
Reserved
PWM, Phase
1
0
1
Correct
1
1
0
Reserved
1
1
1
Fast PWM
1. MAX= 0xFF
2. BOTTOM= 0x00
7
6
5
(1)
”Phase Correct PWM Mode” on
”Modes of Operation” on page
145).
Update of
TOP
OCRx at
0xFF
Immediate
0xFF
TOP
OCRA
Immediate
0xFF
BOTTOM
OCRA
TOP
OCRA
BOTTOM
4
3
2
1
TOV Flag
(1)(2)
Set on
MAX
BOTTOM
MAX
MAX
BOTTOM
TOP
0
156

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