USB2513B-AEZC View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
MFG CO.
'USB2513B-AEZC' PDF : 63 Pages View PDF
USB 2.0 Hi-Speed Hub Controller
Datasheet
5.5.1.1 RESET_N for Strapping Option Configuration
Hardware
Read
reset asserted CFG_SEL[1:0]
Drive strap
outputs to Attach USB
inactive levels upstream
USB reset
recovery
Start completion
Idle request response
t1
t5
t2
t3
RESET_N
t6
t7
t8
VSS
t4
CFG_SEL[2:0]
don’t care
valid
VSS
don’t care
driven by hub if strap is an output
Figure 5.3 Reset_N Timing for Default Configuration
NAME
DESCRIPTION
MIN
TYP
MAX
t1
RESET_N asserted
1
t2
CFG_SEL[1:0] setup time
16.7
t3
CFG_SEL[1:0] hold time
16.7
1400
t4
Hub outputs driven to inactive logic states
1.5
2
t5
USB attach (see notes)
100
t6
Host acknowledges attach and signals USB reset
100
t7
USB idle
undefined
t8
Completion time for requests (with or without data
5
stage)
UNITS
μs
ns
ns
μs
ms
ms
ms
msec
Notes:
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 Chapter 6: DC Parameters,
prior to (or coincident with) the assertion of RESET_N.
SMSC USB251xB/xBi
45
DATASHEET
Revision 2.2 (02-17-12)
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