ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 315

• Manufacturer Part Number: ATMEGA649A-AU
• Description: IC MCU AVR 64K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA649A-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

27.6
27.6.1
8284A–AVR–10/10
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
ATmega169A/169PA/329A/329PA/3290A/3290PA/649A/649P/6490A/6490P. Pulses are
assumed to be at least 250ns unless otherwise noted.
I n t h i s s e c t i o n , s o m e p i n s o f t h e
ATmega169A/169PA/329A/329PA/3290A/3290PA/649A/649P/6490A/6490P are referenced by
signal names describing their functionality during parallel programming, see
page 315
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 27-1. Parallel Programming
Table 27-9.
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
Programming Mode
Signal Name in
RDY/BSY
and
BS1
XA0
WR
OE
Table 27-9 on page
Pin Name Mapping
RDY/BSY
Table 27-12 on page
Pin Name
Table 27-11 on page
PAGEL
+12 V
BS2
BS1
XA0
XA1
PD1
PD2
PD3
PD4
PD5
WR
OE
315. Pins not described in the following table are referenced
I/O
O
PD1
PD2
PD3
PD4
PD5
PD6
PD7
RESET
XTAL1
GND
PA0
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
316.
316.
PB7 - PB0
AVCC
VCC
+5V
+5V
DATA
Figure 27-1 on
315