ATmega6490 Atmel Corporation, ATmega6490 Datasheet - Page 260
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ATmega6490
Manufacturer Part Number
ATmega6490
Description
Manufacturer
Atmel Corporation
Specifications of ATmega6490
Flash (kbytes)
64 Kbytes
Pin Count
100
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
69
Ext Interrupts
32
Usb Speed
No
Usb Interface
No
Spi
2
Twi (i2c)
1
Uart
1
Segment Lcd
160
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
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
4
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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Part Number
Manufacturer
Quantity
Price
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Manufacturer:
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20 000
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Part Number:
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Company:
Part Number:
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Manufacturer:
Atmel
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Company:
Part Number:
ATmega6490A-AUR
Manufacturer:
Maxim
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Company:
Part Number:
ATmega6490P-AU
Manufacturer:
Atmel
Quantity:
779
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25.6.5
260
ATmega329/3290/649/6490
Scanning the ADC
Table 25-4.
Figure 25-9
Boundary-scan cell from
used for pure connectivity testing, since all analog inputs are shared with a digital port pin as
well.
Figure 25-9. Analog to Digital Converter
The signals are described briefly in
Signal
Name
AC_IDLE
ACO
ACME
ACBG
NEGSEL_2
NEGSEL_1
NEGSEL_0
MUXEN_7
MUXEN_6
MUXEN_5
MUXEN_4
MUXEN_3
MUXEN_2
MUXEN_1
MUXEN_0
EXTCH
ADC_7
ADC_6
ADC_5
ADC_4
ADC_3
ADC_2
ADC_1
ADC_0
ADC_2
ADC_1
ADC_0
shows a block diagram of the ADC with all relevant control and observe signals. The
Direction as
Seen from the
Comparator
input
output
input
input
Boundary-scan Signals for the Analog Comparator
SCTEST
AMPEN
ACLK
ST
Figure 25-5
To Comparator
Description
Comparator when
true
Analog
Comparator Output
from ADC mux
when true
Reference enable
Turns off Analog
Uses output signal
Bandgap
+
-
1x
Table
ADCBGEN
is attached to each of these signals. The ADC need not be
VCCREN
IREFEN
AREF
25-5.
PASSEN
ACTEN
1.22V
GNDEN
ref
Recommended
Input when Not
in Use
1
Will become
input to µC code
being executed
0
0
1.11V
ref
PRECH
DAC_9..0
ADCEN
HOLD
Output Values when
Recommended
Inputs are Used
Depends upon µC
code being executed
0
Depends upon µC
code being executed
Depends upon µC
code being executed
PRECH
AREF
10-bit DAC
AREF
+
-
2552K–AVR–04/11
DACOUT
COMP
COMP
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