ATMEGA644V-10MUR Atmel, ATMEGA644V-10MUR Datasheet - Page 299

• Manufacturer Part Number: ATMEGA644V-10MUR
• Description: MCU AVR 64K FLASH 10MHZ 44QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644V-10MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• 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: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

25.8
25.8.1
2593N–AVR–07/10
Serial Downloading
Serial Programming Pin Mapping
Table 25-14. Parallel Programming Characteristics, V
Notes:
Both the Flash and EEPROM memory arrays can be programmed using a serial programming
bus while RESET is pulled to GND. The serial programming interface consists of pins SCK,
MOSI (input) and MISO (output). After RESET is set low, the Programming Enable instruction
needs to be executed first before program/erase operations can be executed. NOTE, in
25-15 on page
SPI pins dedicated for the internal Serial Peripheral Interface - SPI.
Table 25-15. Pin Mapping Serial Programming
Figure 25-10. Serial Programming and Verify
Notes:
Symbol
t
t
t
t
XLOL
BVDV
OLDV
OHDZ
Symbol
MOSI
MISO
1. t
2. t
1. If the device is clocked by the internal Oscillator, it is no need to connect a clock source to the
2. V
SCK
commands.
XTAL1 pin.
WLRH
WLRH_CE
CC
Parameter
XTAL1 Low to OE Low
BS1 Valid to DATA valid
OE Low to DATA Valid
OE High to DATA Tri-stated
- 0.3V < AVCC < V
299, the pin mapping for serial programming is listed. Not all packages use the
is valid for the Write Flash, Write EEPROM, Write Fuse bits and Write Lock bits
is valid for the Chip Erase command.
(PDIP-40)
Pins
PB5
PB6
PB7
MOSI
MISO
SCK
CC
+ 0.3V, however, AVCC should always be within 1.8V - 5.5V
XTAL1
RESET
GND
(TQFP-44)
(1)
Pins
PB5
PB6
PB7
AVCC
VCC
CC
= 5V ±10% (Continued)
+1.8V - 5.5V
+1.8V - 5.5V
I/O
O
Min
I
I
(2)
0
0
Typ
ATmega644
Serial Data out
Serial Data in
Description
Serial Clock
Max
250
250
250
Units
ns
Table
299