參數(shù)資料
型號: uPD720114GA-YEU-A
廠商: NEC Corp.
英文描述: MOS INTEGRATED CIRCUIT
中文描述: 馬鞍山集成電路
文件頁數(shù): 20/32頁
文件大?。?/td> 269K
代理商: UPD720114GA-YEU-A
Data Sheet S17462EJ4V0DS
20
μ
PD720114
(3/4)
Parameter
Symbol
Conditions
Min.
Max.
Unit
Hub Event Timings
Time to detect a downstream facing port
connect event (
Figure 2-17
):
Awake hub
Suspended hub
t
DCNN
2.5
2.5
2000
12000
μ
s
μ
s
Time to detect a disconnect event at a hub’s
downstream facing port (
Figure 2-16
)
t
DDIS
2.0
2.5
μ
s
Duration of driving resume to a downstream
port (only from a controlling hub)
t
DRSMDN
20
ms
Time from detecting downstream resume to
rebroadcast
t
URSM
1.0
ms
Duration of driving reset to a downstream
facing port (
Figure 2-18
)
t
DRST
Only for a SetPortFeature
(PORT_RESET) request
10
20
ms
Time to detect a long K from upstream
t
URLK
2.5
100
μ
s
Time to detect a long SE0 from upstream
t
URLSE0
2.5
10000
μ
s
Duration of repeating SE0 upstream (for
low-/full-speed repeater)
t
URPSE0
23
FS Bit
times
Inter-packet delay (for high-speed) of
packets traveling in same direction
t
HSIPDSD
88
Bit
times
Inter-packet delay (for high-speed) of
packets traveling in opposite direction
t
HSIPDOD
8
Bit
times
Inter-packet delay for device/root hub
response with detachable cable for high-
speed
t
HSRSPIPD1
192
Bit
times
Time of which a Chirp J or Chirp K must be
continuously detected (filtered) by hub or
device during Reset handshake
t
FILT
2.5
μ
s
Time after end of device Chirp K by which
hub must start driving first Chirp K in the
hub’s chirp sequence
t
WTDCH
100
μ
s
Time for which each individual Chirp J or
Chirp K in the chirp sequence is driven
downstream by hub during reset
t
DCHBIT
40
60
μ
s
Time before end of reset by which a hub
must end its downstream chirp sequence
t
DCHSE0
100
500
μ
s
Time from internal power good to device
pulling D
+
beyond V
IHZ
(
Figure 2-18
)
t
SIGATT
100
ms
Debounce interval provided by USB system
software after attach (
Figure 2-18
)
t
ATTDB
100
ms
Maximum duration of suspend averaging
interval
t
SUSAVGI
1
s
Period of idle bus before device can initiate
resume
t
WTRSM
5
ms
Duration of driving resume upstream
t
DRSMUP
1
15
ms
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