SAM7S128 Atmel Corporation, SAM7S128 Datasheet - Page 511

• Manufacturer Part Number: SAM7S128
• Manufacturer: Atmel Corporation

Specifications of SAM7S128

• Flash (kbytes): 128 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 55 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 32
• Ext Interrupts: 32
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 1
• Uart: 3
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

6175L–ATARM–28-Jul-11
When a setup transaction is received after a stall handshake, STALLSENT must be cleared in
order to prevent interrupts due to STALLSENT being set.
Figure 35-12. Stall Handshake (Data IN Transfer)
Figure 35-13. Stall Handshake (Data OUT Transfer)
3. The microcontroller is notified that the device has sent the stall by polling the
USB Bus
Packets
FORCESTALL
STALLSENT
USB Bus
Packets
FORCESTALL
STALLSENT
STALLSENT to be set. An endpoint interrupt is pending while STALLSENT is set. The
microcontroller must clear STALLSENT to clear the interrupt.
Data OUT PID
Data IN
PID
Set by USB Device
Data OUT
Stall PID
Set by Firmware
Stall PID
Set by Firmware
Interrupt Pending
Interrupt Pending
Set by
USB Device
Cleared by Firmware
SAM7S Series
Cleared by Firmware
Cleared by Firmware
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