ISP1521 查看數據表（PDF） - Philips Electronics
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ISP1521 Datasheet PDF : 53 Pages
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Philips Semiconductors
ISP1521
Hi-Speed USB hub controller
9397 750 13702
Product data
Table 2: Pin description[1]…continued
Symbol[2]
Pin Type Description
DP3
55 AI/O downstream facing port 3 D+ connection (analog)[3]
VCC2
GND
56 -
57 -
transceiver supply voltage 2 (3.3 V)
ground supply
DM4
DP4
58 AI/O downstream facing port 4 D− connection (analog)[3]
59 AI/O downstream facing port 4 D+ connection (analog)[3]
NOOC
GRN4_N
60 I
61 I/O
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
VREF(5V0)
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
VREF(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
VCC3
70 -
digital supply voltage 3 (3.3 V)
Rev. 03 — 24 November 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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