AT90USB1287 Atmel Corporation, AT90USB1287 Datasheet - Page 326
AT90USB1287
Manufacturer Part Number
AT90USB1287
Description
Manufacturer
Atmel Corporation
Specifications of AT90USB1287
Flash (kbytes)
128 Kbytes
Pin Count
64
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
48
Ext Interrupts
16
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device + OTG
Spi
2
Twi (i2c)
1
Uart
1
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)
8
Eeprom (bytes)
4096
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
4
Output Compare Channels
10
Input Capture Channels
1
Pwm Channels
9
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90USB1287-16AU
Manufacturer:
ATMEL
Quantity:
1 550
Part Number:
AT90USB1287-16AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
AT90USB1287-16MU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT90USB1287-AU
Manufacturer:
ATMEL
Quantity:
1 459
Part Number:
AT90USB1287-AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT90USB1287-MU
Manufacturer:
KEMET
Quantity:
30 000
- Current page: 326 of 461
- Download datasheet (5Mb)
25.8
25.8.1
326
ADC Register Description
AT90USB64/128
ADC Multiplexer Selection Register – ADMUX
Table 25-2.
Example 1:
Example 2:
• Bit 7:6 – REFS1:0: Reference Selection Bits
These bits select the voltage reference for the ADC, as shown in
changed during a conversion, the change will not go in effect until this conversion is complete
Bit
Read/Write
Initial Value
V
V
V
...
V
V
V
...
V
V
V
ADCn
ADCm
ADCm
ADCm
ADCm
ADCm
ADCm
ADCm
ADCm
– ADMUX = 0xED (ADC3 - ADC2, 10x gain, 2.56V reference, left adjusted result)
– Voltage on ADC3 is 300 mV, voltage on ADC2 is 500 mV.
– ADCR = 512 * 10 * (300 - 500) / 2560 = -400 = 0x270
– ADCL will thus read 0x00, and ADCH will read 0x9C.
– ADMUX = 0xFB (ADC3 - ADC2, 1x gain, 2.56V reference, left adjusted result)
– Voltage on ADC3 is 300 mV, voltage on ADC2 is 500 mV.
– ADCR = 512 * 1 * (300 - 500) / 2560 = -41 = 0x029.
– ADCL will thus read 0x40, and ADCH will read 0x0A.
+ 0.999 V
+ 0.998 V
+ 0.001 V
- 0.001 V
- 0.999 V
- V
Writing zero to ADLAR right adjusts the result: ADCL = 0x70, ADCH = 0x02.
Writing zero to ADLAR right adjusts the result: ADCL = 0x00, ADCH = 0x29.
+ V
REF
REF
/GAIN
REFS1
/GAIN
Correlation Between Input Voltage and Output Codes
R/W
REF
REF
7
0
REF
REF
REF
/GAIN
/GAIN
/GAIN
/GAIN
/GAIN
REFS0
R/W
6
0
ADLAR
Read code
R/W
5
0
0x1FF
0x1FF
0x1FE
0x3FF
0x001
0x000
0x201
0x200
...
...
MUX4
R/W
4
0
Corresponding decimal value
511
511
510
...
1
0
-1
...
-511
-512
MUX3
R/W
3
0
MUX2
R/W
2
0
MUX1
R/W
1
0
Table
MUX0
R/W
0
0
25-3. If these bits are
ADMUX
7593K–AVR–11/09
Related parts for AT90USB1287
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Digital Attenuator 32-Pin FQFP T/R
Manufacturer:
M/A-Com Technology Solutions
Datasheet:
Part Number:
Description:
MLP DIGITAL ATTENUATOR
Manufacturer:
M/A-Com Technology Solutions
Part Number:
Description:
Digital Attenuator 32-Pin FQFP
Manufacturer:
M/A-Com Technology Solutions
Datasheet:
Part Number:
Description:
Digital Attenuator 32-Pin FQFP T/R
Manufacturer:
M/A-Com Technology Solutions
Datasheet:
Part Number:
Description:
MLP DIGITAL ATTENUATOR
Manufacturer:
M/A-Com Technology Solutions
Part Number:
Description:
Digital Attenuator, 50 Db, 6-bit, Ttl Driver, Dc-2.4 Ghz
Manufacturer:
Tyco Electronics
Datasheet:
Part Number:
Description:
Digital Attenuator, 31.5 Db, 6-bit, Ttl Driver, Dc-4.0 Ghz
Manufacturer:
Tyco Electronics
Datasheet:
Part Number:
Description:
Digital Attenuator, 31.5 Db, 6-bit, Ttl Driver, Dc-4.0 Ghz
Manufacturer:
Tyco Electronics
Datasheet:
Part Number:
Description:
Digital Attenuator, 31db, 5-bit, Ttl Driver Dc - 3.0 Ghz
Manufacturer:
Tyco Electronics
Datasheet:
Part Number:
Description:
Digital Attenuator, 15.5 Db, 5-bit, Ttl Driver, Dc-3.5 Ghz
Manufacturer:
Tyco Electronics
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet: