ISP1520 Просмотр технического описания (PDF) - Philips Electronics
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ISP1520 Datasheet PDF : 51 Pages
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Philips Semiconductors
ISP1520
Hi-Speed USB hub controller
Table 2: Pin description[1]…continued
Symbol[2]
Pin Type Description
GRN2_N
54 I/O
output — green LED port indicator (open-drain) for
downstream facing port 2
input — function of the pin when used as an input is given in
Table 9
AMB2_N
55 I/O
output — amber LED port indicator (open-drain) for
downstream facing port 2
input — function of the pin when used as an input is given in
Table 8
VREF(5V0)
56 -
reference voltage (5 V ± 5 %); used to power internal pull-up
resistors of PSWn_N pins and also for the analog
overcurrent detection
VCC3
GND
57 -
58 -
digital supply voltage 3 (3.3 V)
ground supply
GND
59 -
ground supply
GRN1_N
60 I/O
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
AMB1_N
61 I/O
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
HUBGL_N 62 O
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; this LED is off in the
suspend mode (open-drain)
SCL
63 I/O I2C-bus clock (open-drain); see Table 11
SDA
64 I/O I2C-bus data (open-drain); see Table 11
[1] The maximum current the ISP1520 can sink on a pin is 8 mA.
[2] Symbol names ending with underscore N (for example, NAME_N) represent active LOW signals.
[3] Downstream ports 1 and 2 cannot be disabled.
[4] To disable a downstream port n, connect both pins DPn and DMn to VCC (3.3 V); unused ports must
be disabled in reverse order starting from port 4.
9397 750 11689
Product data
Rev. 02 — 04 May 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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