AT90USB646-MU Atmel, AT90USB646-MU Datasheet - Page 411

• Manufacturer Part Number: AT90USB646-MU
• Description: IC AVR MCU 64K 64QFN
• Manufacturer: Atmel
• Series: AVR® 90USBr

Specifications of AT90USB646-MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART, USB, USB OTG
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 48
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VQFN Exposed Pad, 64-HVQFN, 64-SQFN, 64-DHVQFN
• Processor Series: 90USB
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, TWI, USART, USB
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 48
• Number Of Timers: 4
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Cpu Family: AT90
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Total Internal Ram Size: 4KB
• # I/os (max): 48
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 64
• Package Type: QFN EP
• For Use With: ATSTK600-TQFP64 - STK600 SOCKET/ADAPTER 64-TQFP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATSTK525 - KIT STARTER FOR AT90USBAT90USBKEY2 - KIT DEMO FOR AT90USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AT90USB646-16MU; AT90USB646-16MU

7593K–AVR–11/09
Figure 30-9. External Memory Timing (SRWn1 = 1, SRWn0 = 0)
Figure 30-10. External Memory Timing (SRWn1 = 1, SRWn0 = 1)
The ALE pulse in the last period (T4-T7) is only present if the next instruction accesses the RAM (internal
or external).
System Clock (CLK
System Clock (CLK
DA7:0 (XMBK = 0)
DA7:0 (XMBK = 0)
DA7:0
A15:8
CPU
ALE
DA7:0
WR
A15:8
RD
CPU
ALE
WR
)
RD
)
Prev. addr.
Prev. data
Prev. addr.
Prev. data
T1
T1
1
Address
Address
4
2
1
5
T2
6
Address
Address
3a
3b
4
2
XX
7
5
8
T2
6
13
3a
3b
XX
10
7
8
13
T3
10
T3
Address
Data
12
Data
16
15
9
T4
Data
Address
12
Data
16
15
T4
9
T5
AT90USB64/128
()
11
T5
T6
11
14
T6
14
T7
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