UPD72012 Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD72012

HUB CONTROLLER FOR UNIVERSAL SERIAL BUS

NEC => Renesas Technology 

µPD72012

Pin No.Note 1 Pin Name

I/O

Signal Name

Function

(2/3)

18(24)

AVDD1

-

AVDD1

Power supply pin of on-chip clock drive circuit.

To stabilize the power supply, connect directly to a stable power

supply using the shortest wire possible or connect to GND via a

capacitor along the wire (3.3 V input).

19(25) CLK / X2

I

CLOCK / XTAL

When you input a clock signal from an oscillator, input at the 48 MHz

CMOS level (5 V can be input).

When using a 4 MHz crystal oscillator, connect the oscillator to this

pin.

20(26) X1

I

XTAL

When using a 4 MHz crystal oscillator, connect the oscillator to this

pin.

21(27) AGND1

-

AGND1

GND pin of on-chip clock drive circuit.

Connect to GND.

22(28) AGND2

-

AGND2

GND pin of on-chip frequency multiplier (PLL).

Connect to GND.

23(29)

AVDD2

-

AVDD2

Power supply pin of on-chip frequency multiplier (PLL).

To stabilize the power supply, connect directly to a stable power

supply using the shortest wire possible or connect to GND via a

capacitor along the wire (3.3 V input).

24(30)

DVDD

-

DVDD

(TS1)

Test pin of µPD72012 (corresponds to TS1 pin in µPD72011).

Connect to 3.3 V power supply.

25(31)

DGND

(Buffer)

-

DGND

(Buffer)

Connect to GND.

26(32) CS1

I

PORTCURRENT1 Low active input pin that inputs overcurrent states detected by

external circuit of downstream port #1.

When not using this pin, connect it directly to VDD. Note 2

27(33) CS2

I

PORTCURRENT2 Low active input pin that inputs overcurrent states detected by

external circuit of downstream port #2.

When not using this pin, connect it directly to VDD. Note 2

28(34) CS3

I

PORTCURRENT3 Low active input pin that inputs overcurrent states detected by

external circuit of downstream port #3.

When not using this pin, connect it directly to VDD. Note 2

29(35) CS4

I

PORTCURRENT4 Low active input pin that inputs overcurrent states detected by

external circuit of downstream port #4.

When not using this pin, connect it directly to VDD. Note 2

30(36) CS5

I

PORTCURRENT5 Low active input pin that inputs overcurrent states detected by

external circuit of downstream port #5.

When not using this pin, connect it directly to VDD. Note 2

Notes 1. Pin numbers for QFP are shown in ( ).

2. For details, refer to Table 1-3 in 1.2 Tables by Pin Function.

8

Data Sheet S13918EJ3V0DS

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