AT90USB1286 Atmel Corporation, AT90USB1286 Datasheet - Page 145

• Manufacturer Part Number: AT90USB1286
• Manufacturer: Atmel Corporation

Specifications of AT90USB1286

• 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
• 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

14.10.8
14.10.9
14.10.10 Output Compare Register 1 B – OCR1BH and OCR1BL
14.10.11 Output Compare Register 1 C – OCR1CH and OCR1CL
14.10.12 Output Compare Register 3 A – OCR3AH and OCR3AL
7593K–AVR–11/09
Timer/Counter3 – TCNT3H and TCNT3L
Output Compare Register 1 A – OCR1AH and OCR1AL
The two Timer/Counter I/O locations (TCNTnH and TCNTnL, combined TCNTn) give direct
access, both for read and for write operations, to the Timer/Counter unit 16-bit counter. To
ensure that both the high and low bytes are read and written simultaneously when the CPU
accesses these registers, the access is performed using an 8-bit temporary High Byte Register
(TEMP). This temporary register is shared by all the other 16-bit registers.
Registers” on page 119.
Modifying the counter (TCNTn) while the counter is running introduces a risk of missing a com-
pare match between TCNTn and one of the OCRnx Registers.
Writing to the TCNTn Register blocks (removes) the compare match on the following timer clock
for all compare units.
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
TCNT1[15:8]
TCNT1[7:0]
R/W
0
7
TCNT3[15:8]
TCNT3[7:0]
R/W
0
7
OCR1A[15:8]
OCR1A[7:0]
R/W
0
7
OCR1B[15:8]
OCR1B[7:0]
R/W
0
7
OCR1C[15:8]
OCR1C[7:0]
R/W
0
7
OCR3A[15:8]
OCR3A[7:0]
R/W
0
R/W
0
6
R/W
0
6
R/W
0
6
R/W
0
6
R/W
0
6
R/W
0
R/W
0
5
R/W
0
5
R/W
0
5
R/W
0
5
R/W
0
5
R/W
0
R/W
0
4
R/W
0
4
R/W
0
4
R/W
0
4
R/W
0
4
R/W
0
0
3
0
3
0
3
0
3
0
3
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
2
R/W
0
2
R/W
0
2
R/W
0
2
R/W
0
2
R/W
0
R/W
0
1
R/W
0
1
R/W
0
1
R/W
0
1
R/W
0
1
R/W
0
AT90USB64/128
R/W
0
0
R/W
0
0
R/W
0
0
R/W
0
0
R/W
0
0
R/W
0
See “Accessing 16-bit
TCNT1H
TCNT1L
TCNT3H
TCNT3L
OCR1AH
OCR1AL
OCR1BH
OCR1BL
OCR1CH
OCR1CL
OCR3AH
OCR3AL
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