ATMEGA164P-20AQ Atmel, ATMEGA164P-20AQ Datasheet - Page 298

• Manufacturer Part Number: ATMEGA164P-20AQ
• Description: MCU AVR 16K FLASH 20MHZ 44-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA164P-20AQ

• 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): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• For Use With: ATSTK600-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8011O–AVR–07/10
Table 24-9.
Table 24-10. BS2 and BS1 Encoding
,
Table 24-11. Pin Values Used to Enter Programming Mode
Table 24-12. XA1 and XA0 Enoding
Table 24-13. Command Byte Bit Encoding
BS2
0
0
1
1
Programming Mode
Signal Name in
XA1
0
0
1
1
Command Byte
PAGEL
1000 0000
0100 0000
0010 0000
0001 0000
0001 0001
DATA
BS2
BS1
0
1
0
1
PAGEL
XA1
XA0
BS1
Pin
Pin Name Mapping
XA0
Flash / EEPROM
Address
Low Byte
High Byte
Extended High
Byte
Reserved
0
1
0
1
Pin Name
PB7-0
PD7
PA0
Action when XTAL1 is Pulsed
Load Flash or EEPROM Address (High or low address byte determined
by BS2 and 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
Flash Data
Loading /
Reading
Low Byte
High Byte
Reserved
Reserved
I/O
I/O
I
I
Prog_enable[3]
Prog_enable[2]
Prog_enable[1]
Prog_enable[0]
Symbol
Function
Program Memory and EEPROM data Page Load.
Byte Select 2.
Bi-directional Data bus (Output when OE is low).
ATmega164P/324P/644P
Fuse
Programming
Low Byte
High Byte
Extended Byte
Reserved
Value
Reading Fuse
and Lock Bits
Fuse Low Byte
Lockbits
Extended Fuse
Byte
Fuse High Byte
0
0
0
0
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