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
5.5.1.2 RESET_N for EEPROM Configuration
Hardware reset
Read
Read I2C
asserted
CFG_SEL[1:0] EEPROM
Attach USB
upstream
USB reset
recovery
Start completion
Idle request response
RESET_N
VSS
t1
t2
t3
t4
t6
t5
t7
t8
t9
CFG_SEL[2:0]
VSS
don’t care
valid
don’t care
Figure 5.4 Reset_N Timing for EEPROM Mode
NAME
DESCRIPTION
MIN
TYP
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
t5
EEPROM read (hub configuration)
2.0
t6
USB attach (see notes)
t7
Host acknowledges attach and signals USB reset
100
t8
USB idle
undefined
t9
Completion time for requests (with or without data
stage)
MAX
1400
500
99.5
100
5
UNITS
μs
ns
ns
μs
ms
ms
ms
ms
ms
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 t6+t7+t8+t9.
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.
Revision 2.2 (02-17-12)
46
DATASHEET
SMSC USB251xB/xBi
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