ATMEGA168PA-PU Atmel, ATMEGA168PA-PU Datasheet - Page 303

• Manufacturer Part Number: ATMEGA168PA-PU
• Description: MCU, 8BIT, AVR, 16K FLASH, 28PDIP
• Manufacturer: Atmel

Specifications of ATMEGA168PA-PU

• Controller Family/series: Atmega
• No. Of I/o's: 23
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 1KB
• Cpu Speed: 20MHz
• No.: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 16KB
• Oscillator Type: External, Internal
• Rohs Compliant: Yes

8271C–AVR–08/10
Table 27-13. Pin Name Mapping
Table 27-14. Pin Values Used to Enter Programming Mode
Table 27-15. XA1 and XA0 Coding
Table 27-16. Command Byte Bit Coding
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
Signal Name in
Programming Mode
RDY/BSY
OE
WR
BS1
XA0
XA1
PAGEL
BS2
DATA
Command Byte
XA1
0
0
1
1
1000 0000
0100 0000
0010 0000
0001 0000
0001 0001
PAGEL
XA1
XA0
BS1
Pin
XA0
0
1
0
1
Action when XTAL1 is Pulsed
Load Flash or EEPROM Address (High or low address byte determined by BS1).
Load Data (High or Low data byte for Flash determined by BS1).
Load Command
No Action, Idle
Command Executed
Chip Erase
Write Fuse bits
Write Lock bits
Write Flash
Write EEPROM
{PC[1:0]: PB[5:0]}
Pin Name
Prog_enable[3]
Prog_enable[2]
Prog_enable[1]
Prog_enable[0]
PD1
PD2
PD3
PD4
PD5
PD6
PD7
PC2
Symbol
I/O
I/O
O
I
I
I
I
I
I
I
Function
0: Device is busy programming, 1: Device is
ready for new command
Output Enable (Active low)
Write Pulse (Active low)
Byte Select 1 (“0” selects Low byte, “1” selects
High byte)
XTAL Action Bit 0
XTAL Action Bit 1
Program memory and EEPROM Data Page
Load
Byte Select 2 (“0” selects Low byte, “1” selects
2’nd High byte)
Bi-directional Data bus (Output when OE is low)
Value
0
0
0
0
303