USB2513B-I/M2 View Datasheet(PDF) - Microchip Technology
Part Name
Description
MFG CO.
USB2513B-I/M2 Datasheet PDF : 57 Pages
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USB251xB/xBi
5.5.1.1 RESET_N for Strapping Option Configuration
FIGURE 5-1:
RESET_N TIMING FOR DEFAULT CONFIGURATION
Hardware
reset asserted
Drive strap
Read
outputs to Attach USB
CFG_SEL[1:0] inactive levels upstream
Attach
Debounce
USB_RESET USB Reset
Interval USB_RESET State
Recovery
RESET_N
t1
t5
t2
t3
VSS
CFG_SEL[2:0]
VSS
don’t care
t4
valid don’t care
t6
t7
t8
t9
driven by hub if strap is an output
Name
t1
t2
t3
t4
t5
t6
t7
Description
RESET_N asserted
CFG_SEL[1:0] setup time
CFG_SEL[1:0] hold time
Hub outputs driven to inactive logic states
USB attach (see notes)
Host acknowledges attach and signals USB reset
USB_RESET
t8 USB_RESET State
t9 USB Reset Recovery
MIN
1
16.7
16.7
100
Note 5-1
10
TYP
1.5
3
Host
Defined
MAX
1400
2
Units
s
ns
ns
s
s
ms
ms
ms
ms
Note:
• When in bus-powered mode, the hub and its associated circuitry must not consume more than 100 mA from the
upstream USB power source during t1+t5.
• All power supplies must have reached the operating levels mandated in Section 6.0, "DC Parameters", prior to
(or coincident with) the assertion of RESET_N.
Note 5-1 10 ms for hubs, 50 ms for root ports.
DS00001692C-page 36
2010 - 2015 Microchip Technology Inc.
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