ATMEGA16U2-16AU Atmel, ATMEGA16U2-16AU Datasheet - Page 250

• Manufacturer Part Number: ATMEGA16U2-16AU
• Description: 8-bit Microcontrollers - MCU 16K Flash
• Manufacturer: Atmel

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

25.6
25.6.1
7799D–AVR–11/10
Parallel Programming Parameters, Pin Mapping, and Commands
Signal Names
This section describes how to parallel program and verify Flash Program memory, EEPROM
Data memory, Memory Lock bits, and Fuse bits in the ATmega8U2/16U2/32U2. Pulses are
assumed to be at least 250 ns unless otherwise noted.
In this section, some pins of the ATmega8U2/16U2/32U2 are referenced by signal names
describing their functionality during parallel programming, see
not 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
Figure 25-1. Parallel Programming
Note:
Table 25-9.
Programming Mode
Signal Name in
RDY/BSY
1. Unused Pins should be left floating.
BS1
XA0
XA1
WR
OE
Pin Name Mapping
Table
RDY/BSY
Pin Name
Table
PAGEL
+12 V
BS2
PD1
PD2
PD3
PD4
PD5
PD6
BS1
XA0
XA1
WR
OE
25-13.
25-12.
(1)
I/O
PD1
PD2
PD3
PD4
PD5
PD6
PD7
RESET
XTAL1
GND
O
PC6
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.
XTAL Action Bit 0
XTAL Action Bit 1
ATmega8U2/16U2/32U2
PB7:0
AVCC
VCC
+5V
+5V
Figure 25-1
DATA
and
Table
25-9. Pins
250