AT90USB647-MU Atmel, AT90USB647-MU Datasheet - Page 284

• 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

284
AT90USB64/128
00b: Control10b: Bulk
01b: Isochronous11b: Interrupt
• 5-4 - Reserved
The value read from these bits is always 0. Do not set these bits.
• 3-2 - Reserved for test purpose
The value read from these bits is always 0. Do not set these bits.
• 1 - Reserved
The value read from this bits is always 0. Do not set this bit.
• 0 - EPDIR - Endpoint Direction Bit
Set to configure an IN direction for bulk, interrupt or isochronous endpoints.
Clear to configure an OUT direction for bulk, interrupt, isochronous or control endpoints.
• 7 - Reserved
The value read from these bits is always 0. Do not set these bits.
• 6-4 - EPSIZE2:0 - Endpoint Size Bits
Set this bit according to the endpoint size:
000b: 8 bytes
001b: 16 bytes
010b: 32 bytes
011b: 64 bytes
• 3-2 - EPBK1:0 - Endpoint Bank Bits
Set this field according to the endpoint size:
00b: One bank
01b: Double bank
1xb: Reserved. Do not use this configuration.
• 1 - ALLOC - Endpoint Allocation Bit
Set this bit to allocate the endpoint memory.
Clear to free the endpoint memory.
See Section 22.6, page 268 for more details.
• 0 - Reserved
The value read from these bits is always 0. Do not set these bits.
Bit
Read/Write
Initial Value
R
7
0
-
R/W
6
0
100b: 128 bytes (only for endpoint 1)
101b: 256 bytes (only for endpoint 1)
110b: Reserved. Do not use this configuration.
111b: Reserved. Do not use this configuration.
EPSIZE2:0
R/W
5
0
R/W
4
0
R/W
3
0
EPBK1:0
R/W
2
0
ALLOC
R/W
1
0
R
7593K–AVR–11/09
0
0
-
UECFG1X