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
5.5.1.3 RESET_N for SMBus Slave Configuration
Hardware
Read
SMBus code Hub PHY Attach USB
reset asserted CFG_SEL[1:0]
load stabilization upstream
USB reset
recovery
Start completion
Idle request response
RESET_N
VSS
t1
t2
t3
t5
t6
t7
t4
t8
t9
CFG_SEL[2:0]
VSS
don’t care
valid
don’t care
Figure 5.5 Reset_N Timing for SMBus Mode
NAME
DESCRIPTION
MIN
t1
RESET_N Asserted
1
t2
CFG_SEL[1:0] setup time
16.7
t3
CFG_SEL[1:0] hold time
16.7
t4
Hub recovery/stabilization
t5BUS
t5SELF
t6
SMBus code load (Note 5.1)
SMBus Code Load (Note 5.1)
Hub configuration and USB attach
t7
Host acknowledges attach and signals USB reset
100
t8
USB idle
t9
Completion time for requests (with or without data
stage)
TYP
MAX
1400
500
99.5
undefined
100
undefined
5
UNITS
μs
ns
ns
μs
ms
ms
ms
ms
ms
ms
Note 5.1
For bus-powered configurations, there is a 99.5 ms MAX, and the hub and its associated
circuitry must not consume more than 100 mA from the upstream USB power source
during t4+t5+t6+t7+t8+t9. For self-powered configurations, t5 MAX is not applicable and
the time to load the configuration is determined by the external SMBus host.
Note 5.2 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
47
DATASHEET
Revision 2.2 (02-17-12)
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