ATMEGA328P-20PU Atmel, ATMEGA328P-20PU Datasheet - Page 294

• Manufacturer Part Number: ATMEGA328P-20PU
• Manufacturer: Atmel

Specifications of ATMEGA328P-20PU

• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: SPI/TWI/USART
• Program Memory Type: Flash
• Program Memory Size: 32KB
• Total Internal Ram Size: 2KB
• # I/os (max): 23
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 6-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 28
• Package Type: PDIP
• Lead Free Status / Rohs Status: Compliant

27.5
27.6
27.6.1
8025K–AVR–10/09
Page Size
Parallel Programming Parameters, Pin Mapping, and Commands
Signal Names
Table 27-9.
Table 27-10. No. of Words in a Page and No. of Pages in the EEPROM
This section describes how to parallel program and verify Flash Program memory, EEPROM
Data memory, Memory Lock bits, and Fuse bits in the ATmega48P/88P/168P. Pulses are
assumed to be at least 250 ns unless otherwise noted.
In this section, some pins of the ATmega48P/88P/168P are referenced by signal names describ-
ing their functionality during parallel programming, see
described in the following table are referenced by pin names.
The XA1/XA0 pins determine the action executed when the XTAL1 pin is given a positive pulse.
The bit coding is shown in
When pulsing WR or OE, the command loaded determines the action executed. The different
Commands are shown in
Device
ATmega48P
ATmega88P
ATmega168P
Device
ATmega48P
ATmega88P
ATmega168P
No. of Words in a Page and No. of Pages in the Flash
Flash Size
(4K bytes)
(8K bytes)
(16K bytes)
EEPROM
256 bytes
512 bytes
512 bytes
2K words
4K words
8K words
Size
Table
Table
Page Size
32 words
32 words
64 words
4 bytes
4 bytes
4 bytes
27-14.
Page
27-13.
Size
PCWORD
PCWORD
EEA[1:0]
EEA[1:0]
EEA[1:0]
PC[4:0]
PC[4:0]
PC[5:0]
ATmega48P/88P/168P
Figure 27-1
Pages
Pages
No. of
No. of
128
128
128
128
64
64
and
PCPAGE
PCPAGE
PC[10:5]
PC[11:5]
PC[12:6]
EEA[7:2]
EEA[8:2]
EEA[8:2]
Table
27-11. Pins not
EEAMSB
PCMSB
10
11
12
7
8
8
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