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ISP1520 Datasheet(PDF) 6 Page - NXP Semiconductors |
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ISP1520 Datasheet(HTML) 6 Page - NXP Semiconductors |
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6 / 51 page 
Philips Semiconductors ISP1520 Hi-Speed USB hub controller Product data Rev. 02 — 04 May 2004 6 of 51 9397 750 11689 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. RREF 7 AI reference resistor connection; connect this pin through a resistor of 12 k Ω± 1 % to an analog band gap ground reference TEST_HIGH 8 - test pin; connect to 3.3 V VCC1 9 - analog supply voltage 1 (3.3 V) GND 10 - ground supply VCC4 11 - crystal and PLL supply voltage 4 (3.3 V) TEST_HIGH 12 - test pin; connect to 3.3 V VCC2 13 - transceiver supply voltage 2 (3.3 V) GND 14 - ground supply DM1 15 AI/O downstream facing port 1 D − connection (analog)[3] DP1 16 AI/O downstream facing port 1 D+ connection (analog)[3] TEST_LOW 17 - connect to GND TEST_HIGH 18 - connect to +5.0 V through a 10 kΩ resistor OC1_N 19 AI/I overcurrent sense input for downstream facing port 1 (analog/digital) PSW1_N 20 I/O output — power switch control output (open-drain) with an internal pull-up resistor for downstream facing port 1 input — function of the pin when used as an input is given in Table 5 GND 21 - ground supply GND 22 - ground supply VCC3 23 - digital supply voltage 3 (3.3 V) VREF(5V0) 24 - reference voltage (5 V ± 5 %); used to power internal pull-up resistors of PSWn_N pins and also for the analog overcurrent detection OC4_N 25 AI/I overcurrent sense input for downstream facing port 4 (analog/digital) PSW4_N 26 I/O output — power switch control output (open-drain) with an internal pull-up resistor for downstream facing port 4 input — function of the pin when used as an input is given in Table 5 OC3_N 27 AI/I overcurrent sense input for downstream facing port 3 (analog/digital) PSW3_N 28 I/O output — power switch control output (open-drain) with an internal pull-up resistor for downstream facing port 3 input — function of the pin when used as an input is given in Table 5 OC2_N 29 AI/I overcurrent sense input for downstream facing port 2 (analog/digital) PSW2_N 30 I/O output — power switch control output (open-drain) with an internal pull-up resistor for downstream facing port 2 input — function of the pin when used as an input is given in Table 5 Table 2: Pin description[1]…continued Symbol[2] Pin Type Description |
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