isp1520 NXP Semiconductors, isp1520 Datasheet - Page 7

• Manufacturer Part Number: isp1520
• Description: Hi-speed Universal Serial Bus Hub Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
ISP1520_4
Product data sheet
Table 2.
[1]
[2]
[3]
[4]
Symbol
V
V
GND
GND
GRN1_N
AMB1_N
HUBGL_N
SCL
SDA
REF(5V0)
CC3
The maximum current that the ISP1520 can sink on a pin is 8 mA.
Symbol names ending with underscore N (for example, NAME_N) represent active LOW signals.
Downstream ports 1 and 2 cannot be disabled.
To disable a downstream port n, connect both pins DPn and DMn to V
disabled in reverse order starting from port 4.
[1][2]
Pin description
Pin
56
57
58
59
60
61
62
63
64
Type
-
-
-
-
I/O
I/O
O
I/O
I/O
Rev. 04 — 28 April 2006
…continued
Description
reference voltage (5 V
resistors of PSWn_N pins and also for the analog overcurrent
detection
supply voltage 3 (3.3 V) (digital)
ground supply
ground supply
output — green LED port indicator (open-drain) for
downstream facing port 1
input — function of the pin when used as an input is given in
Table 9
output — amber LED port indicator (open-drain) for
downstream facing port 1
input — function of the pin when used as an input is given in
Table 8
hub GoodLink LED indicator output; the LED is off until the hub
is configured; a transaction between the host and the hub will
blink the LED off for 100 ms
I
I
2
2
C-bus clock (open-drain); see
C-bus data (open-drain); see
5 %); used to power internal pull-up
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Hi-Speed USB hub controller
Table 11
Table 11
CC
(3.3 V); unused ports must be
ISP1520
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