isp1521 NXP Semiconductors, isp1521 Datasheet - Page 42

• Manufacturer Part Number: isp1521
• Description: Hi-speed Universal Serial Bus Hub Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 46.
V
[1]
[2]
[3]
[4]
[5]
ISP1521_4
Product data sheet
Symbol
Clock frequency
f
General timing
t
t
t
t
C
SDA timing
t
t
t
t
t
t
Additional I
t
SCL
(SCL)L
(SCL)H
r
f
BUF
SU;STA
HD;STA
SU;DAT
HD;DAT
SU;STO
VD;DAT
CC
Fig 16. I
b
and T
f
Rise time is determined by C
Setup time for (repeated) START condition.
Hold time for (repeated) START condition.
SCL LOW to data-out valid time.
SDA
SCL
SCL
=
2
amb
1
C-bus timing
P
64
Parameter
SCL clock frequency
LOW period of the SCL clock
HIGH period of the SCL clock
rise time
fall time
capacitive load for each bus line
bus free time between a STOP and
START condition
setup time for the START condition
hold time for the START condition
data setup time
data hold time
STOP condition setup time
data valid time
Dynamic characteristics: I
2
C-bus timing
within recommended operating range; V
f
XTAL
t
BUF
.
S
t
HD;STA
b
and pull-up resistor value R
t
SU;DAT
2
C-bus (pins SDA and SCL)
t
HD;DAT
Rev. 04 — 30 March 2006
Conditions
f
SDA and SCL signals
SDA and SCL signals
XTAL
t
t
DD
r
(SCL)H
= 12 MHz
p
= 5 V; V
(typical 4.7 k ).
t
f
t(
SCL)L
SS
= V
GND
; V
t
SU;STA
IL
and V
Sr
[1]
[2]
[3]
[4]
[5]
IH
between V
Min
0
4.7
4.0
-
-
-
4.7
4.7
4.0
250
0
4.0
-
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Hi-Speed USB hub controller
Typ
93.75
-
-
-
-
-
-
-
-
-
-
-
-
SS
and V
ISP1521
Max
100
-
-
1000
300
400
-
-
-
-
-
-
0.4
DD
t
SU;STO
004aaa814
.
P
Unit
kHz
ns
ns
pF
ns
42 of 55
s
s
s
s
s
s
s
s