AT90USB647-MU Atmel, AT90USB647-MU Datasheet - Page 146

• Manufacturer Part Number: AT90USB647-MU
• Description: MCU, 8BIT, 64K FLASH, USB, 64QFN
• Manufacturer: Atmel

Specifications of AT90USB647-MU

• Controller Family/series: AT90
• No. Of I/o's: 48
• Eeprom Memory Size: 2KB
• Ram Memory Size: 4KB
• Cpu Speed: 16MHz
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 64KB
• Oscillator Type: External, Internal
• Package: 64QFN EP
• Device Core: AVR
• Family Name: AT90
• Maximum Speed: 20 MHz
• Ram Size: 4 KB
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 48
• Interface Type: SPI/TWI/USART/USB
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 4
• Lead Free Status / Rohs Status: Details

14.10.13 Output Compare Register 3 B – OCR3BH and OCR3BL
14.10.14 Output Compare Register 3 C – OCR3CH and OCR3CL
14.10.15 Input Capture Register 1 – ICR1H and ICR1L
14.10.16 Input Capture Register 3 – ICR3H and ICR3L
14.10.17 Timer/Counter1 Interrupt Mask Register – TIMSK1
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AT90USB64/128
The Output Compare Registers contain a 16-bit value that is continuously compared with the
counter value (TCNTn). A match can be used to generate an Output Compare interrupt, or to
generate a waveform output on the OCnx pin.
The Output Compare Registers are 16-bit in size. To ensure that both the high and low bytes are
written simultaneously when the CPU writes to 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.
The Input Capture is updated with the counter (TCNTn) value each time an event occurs on the
ICPn pin (or optionally on the Analog Comparator output for Timer/Counter1). The Input Capture
can be used for defining the counter TOP value.
The Input Capture Register is 16-bit in size. To ensure that both the high and low bytes are read
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.
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
See “Accessing 16-bit Registers” on page 119.
7
OCR3B[15:8]
OCR3B[7:0]
R/W
0
7
OCR3C[15:8]
OCR3C[7:0]
R/W
0
7
ICR1[15:8]
ICR1[7:0]
R/W
0
7
ICR3[15:8]
ICR3[7:0]
R/W
0
7
–
R
0
See “Accessing 16-bit Registers” on page 119.
6
R/W
0
6
R/W
0
6
R/W
0
6
R/W
0
6
–
R
0
5
R/W
0
5
R/W
0
5
R/W
0
5
R/W
0
5
ICIE1
R/W
0
4
R/W
0
4
R/W
0
4
R/W
0
4
R/W
0
4
–
R
0
3
R/W
0
3
R/W
0
3
R/W
0
3
R/W
0
3
OCIE1
C
R/W
0
2
R/W
0
2
R/W
0
2
R/W
0
2
R/W
0
2
OCIE1B
R/W
0
1
0
1
0
1
0
1
0
R/W
R/W
R/W
R/W
OCIE1A
R/W
1
0
0
R/W
0
0
R/W
0
0
R/W
0
0
R/W
0
0
TOIE1
R/W
0
OCR3BH
OCR3BL
OCR3CH
OCR3CL
ICR1H
ICR1L
ICR3H
ICR3L
TIMSK1
7593K–AVR–11/09