ATmega644P Automotive Atmel Corporation, ATmega644P Automotive Datasheet - Page 332
ATmega644P Automotive
Manufacturer Part Number
ATmega644P Automotive
Description
Manufacturer
Atmel Corporation
Specifications of ATmega644P Automotive
Flash (kbytes)
64 Kbytes
Pin Count
44
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
32
Ext Interrupts
32
Usb Speed
No
Usb Interface
No
Spi
3
Twi (i2c)
1
Uart
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
4
Eeprom (bytes)
2048
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
Yes
Temp. Range (deg C)
-40 to 125
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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26.4
Table 26-4.
Notes:
Table 26-5.
Note:
332
Symbol
V
t
t
V
t
I
RST
BOD
RAM
V
BG
BG
HYST
BG
(1)
(1)
(1)
(1)
System and Reset Characteristics
1. Values indicated represent typical data from design simulation.
2. The Power-on Reset will not work unless the supply voltage has been below V
3. This is the limit to which VDD can be lowered without losing RAM data.
1. V
(3)
ATmega164P/324P/644P
tested down to V
a voltage where correct operation of the microcontroller is no longer guaranteed.
BODLEVEL 2:0 Fuses
BOT
Reset, Brown-out and Internal Voltage Reference Characteristics
BODLEVEL Fuse Coding
Parameter
Minimum pulse width on RESET Pin
Brown-out Detector Hysteresis
RAM Retention Voltage
Min Pulse Width on Brown-out Reset
Bandgap reference voltage
Bandgap reference start-up time
Bandgap reference current consumption
may be below nominal minimum operating voltage for some devices. For devices where this is the case, the device is
111
110
101
100
011
010
001
000
CC
= V
BOT
during the production test. This guarantees that a Brown-Out Reset will occur before V
(1)
(1)
Min V
2.5
4.1
BOT
V
V
V
C C
C C
C C
= 2.7V, T
= 2.7V, T
= 2.7V, T
Condition
Typ V
Reserved
Reserved
A
A
A
= 25 C
= 25 C
= 25 C
2.7
4.3
BOD Disabled
BOT
POT
(falling)
Min
1.0
Max V
Typ
1.1
50
50
40
10
2.9
4.5
2
BOT
Max
2.5
1.2
70
7674F–AVR–09/09
CC
Units
Units
drops to
V
mV
mV
µA
ns
ns
µs
V
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