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Philips Semiconductors
ISP1521
Hi-Speed USB hub controller
Product data Rev. 03 — 24 November 2004 8 of 53
9397 750 13702
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
DP3 55 AI/O downstream facing port 3 D+ connection (analog)
[3]
V
CC2
56 - transceiver supply voltage 2 (3.3 V)
GND 57 - ground supply
DM4 58 AI/O downstream facing port 4 D− connection (analog)
[3]
DP4 59 AI/O downstream facing port 4 D+ connection (analog)
[3]
NOOC 60 I no overcurrent protection selection input; connect this pin to
HIGH (3.3 V) to select no overcurrent protection; if no
overcurrent is selected, all OC_N pins must be connected to
V
REF(5V0)
GRN4_N 61 I/O output — green LED port indicator (open-drain) for downstream
facing port 4
input — function of the pin when used as an input is given in
Table 9
AMB4_N 62 I/O output — amber LED port indicator (open-drain) for
downstream facing port 4
input — function of the pin when used as an input is given in
Table 8
GRN3_N 63 I/O output — green LED port indicator (open-drain) for downstream
facing port 3
input — function of the pin when used as an input is given in
Table 9
AMB3_N 64 I/O output — amber LED port indicator (open-drain) for
downstream facing port 3
input — function of the pin when used as an input is given in
Table 8
GRN7_N 65 I/O output — green LED port indicator (open-drain) for downstream
facing port 7
input — function of the pin when used as an input is given in
Table 9
AMB7_N 66 I/O output — amber LED port indicator (open-drain) for
downstream facing port 7
input — function of the pin when used as an input is given in
Table 8
GRN2_N 67 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 68 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
V
REF(5V0)
69 - reference voltage (5 V ± 5 %); used to power internal pull-up
resistors of PSWn_N pins and also for the analog overcurrent
detection
V
CC3
70 - digital supply voltage 3 (3.3 V)
Table 2: Pin description
[1]
…continued
Symbol
[2]
Pin Type Description