ATMEGA16U2-16AU Atmel, ATMEGA16U2-16AU Datasheet - Page 251
ATMEGA16U2-16AU
Manufacturer Part Number
ATMEGA16U2-16AU
Description
8-bit Microcontrollers - MCU 16K Flash
Manufacturer
Atmel
Datasheet
1.ATMEGA16U2-16AU.pdf
(310 pages)
Specifications of ATMEGA16U2-16AU
Product Category
8-bit Microcontrollers - MCU
Rohs
yes
Core
AVR
Data Bus Width
8 bit
Program Memory Size
16 KB
Data Ram Size
1.25 KB
Data Rom Size
512 B
Program Memory Type
Flash
Factory Pack Quantity
1250
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7799D–AVR–11/10
Table 25-9.
Table 25-10. BS2 and BS1 Encoding
Table 25-11. Pin Values Used to Enter Programming Mode
Table 25-12. XA1 and XA0 Encoding
Table 25-13. 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
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
PC6
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
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).
ATmega8U2/16U2/32U2
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
251
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