AT43USB325E-AC Atmel, AT43USB325E-AC Datasheet - Page 94

• Manufacturer Part Number: AT43USB325E-AC
• Description: IC USB KEYBOARD CTRLR HUB 64LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB325E-AC

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: SRAM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: SPI, 3-Wire Serial
• Number Of I /o: 42
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

8.5.4.3
8.5.4.4
8.5.4.5
94
AT43USB325
Remote Wake-up, Downstream Ports
Remote Wake-up, Embedded Function
Selective Suspend, Downstream Ports
The hardware detects a connect/disconnect/port resume and propagates resume signaling
upstream. Finally, the hardware enables the oscillator and asserts the RSM interrupt.
The hardware detects an INT0/INT1 and propagates resume signaling upstream. Finally, the
hardware enables the oscillator and asserts the RSM and FRWUP interrupts.
1. Connect/disconnect/port resume
2. Propagate resume signaling
3. Enable Oscillator
4. Set RSM bit
1. External event activates INT0/INT1
2. Propagate resume signaling
3. Enable Oscillator
4. Set RSM and FRMWUP bits
3. Suspend or resume port per
detected
interrupt
command
Hardware
Hardware
Hardware
interrupt
5. Reset RSM and GBL SUSP bits
6. Restore GPIO states if required
7. Clear UOVCER bit 2
8. Enable peripheral activity
5. Clear GLB SUSP, RSM, FRMWUP
6. Restore GPIO states if required
7. Clear UOVCER bit 2
8. Enable peripheral activity
1. Set or Clear Port Feature
2. Write HPCON[2:0] and HPADD[2:0]
bits
PORT_SUSPEND decoded
bits
Firmware
Firmware
Firmware
3355C–USB–4/05