AT90USB647-MU Atmel, AT90USB647-MU Datasheet - Page 262
AT90USB647-MU
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
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AT90USB64/128
• 0 – UVREGE: USB pad regulator Enable
Set to enable the USB pad regulator. Clear to disable the USB pad regulator.
• 7 – USBE: USB macro Enable Bit
Set to enable the USB controller. Clear to disable and reset the USB controller, to disable the
USB transceiver and to disable the USB controller clock inputs.
• 6 – HOST: HOST Bit
Set to enable the Host mode. Clear to enable the device mode.
• 5 – FRZCLK: Freeze USB Clock Bit
Set to disable the clock inputs (the ”Resume Detection” is still active). This reduces the power
consumption. Clear to enable the clock inputs.
• 4 – OTGPADE: OTG Pad Enable
Set to enable the OTG pad. Clear to disable the OTG pad. The OTG pad is actually the VBUS
pad.
Note that this bit can be set/cleared even if USBE=0. That allows the VBUS detection even if the
USB macro is disabled. This pad must be enabled in both Host and Device modes in order to
allow USB operation (attaching, transmitting...).
• 3-2 – Reserved
The value read from these bits is always 0. Do not set these bits.
• 1 – IDTE: ID Transition Interrupt Enable Bit
Set this bit to enable the ID Transition interrupt generation. Clear this bit to disable the ID Transi-
tion interrupt generation.
• 0 – VBUSTE: VBUS Transition Interrupt Enable Bit
Set this bit to enable the VBUS Transition interrupt generation.
Clear this bit to disable the VBUS Transition interrupt generation.
• 7-4 - Reserved
The value read from these bits is always 0. Do not set these bits.
• 3 – SPEED: Speed Status Flag
This should be read only when the USB controller operates in host mode, in device mode the
value read from this bit is undeterminated.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
USBE
R/W
7
0
R
7
0
-
HOST
R/W
6
0
R
6
0
-
FRZCLK
R/W
5
1
R
5
0
-
OTGPADE
R
4
0
-
R/W
4
0
SPEED
R
3
1
R
3
0
-
R
2
0
R
2
0
-
IDTE
R/W
ID
R
1
0
1
1
VBUSTE
VBUS
R/W
0
0
R
0
0
USBSTA
USBCON
7593K–AVR–11/09
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