USB2660 Standard Microsystems Corp., USB2660 Datasheet - Page 55

• Manufacturer Part Number: USB2660
• Description: Ultra Fast Usb 2.0 Hub And Multi-format Flash Media Controller With Dual Sd Interfaces
• Manufacturer: Standard Microsystems Corp.

Ultra Fast USB 2.0 Hub and Multi-Format Flash Media Controller with Dual SD Interfaces
Datasheet
SMSC USB2660/USB2660i
8.6.3
NAME
t3
t4
t5
t6
t7
8051 programs device configuration
USB attach (See Note)
Host acknowledges attach and signals USB reset
USB idle
Completion time for requests (with or without data
stage)
Note: All power supplies must have reached the operating levels mandated in
USB Bus Reset
In response to the upstream port signaling a reset to the device, the device does the following:
Note: The device does not propagate the upstream USB reset to downstream devices.
1. Sets default address to ‘0’.
2. Sets configuration to: Unconfigured.
3. Negates PRTCTL[3:2] to all downstream ports.
4. Clears all TT buffers.
5. Moves device from suspended to active (if suspended).
6. Complies with Section 11.10 of the USB 2.0 Specification for behavior after completion of the reset
The host then configures the device and the device’s downstream port devices in accordance with the
USB 2.0 Specification.
sequence.
Parameters, prior to (or coincident with) the assertion of nRESET.
Table 8.7 nRESET Timing for EEPROM Mode (continued)
DESCRIPTION
DATASHEET
55
MIN
100
Undefined
TYP
20
MAX
100
50
Revision 1.0 (06-09-09)
5
Chapter 10, DC
UNITS
msec
msec
msec
msec
msec