UPD72012 datasheet(8/36 Pages) NEC

8 / 36 page

Data Sheet S13918EJ3V0DS

µPD72012

(2/3)

Pin No.

Note 1

Pin Name

I/O

Signal Name

Function

18(24)

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

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)

XTAL

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

pin.

21(27)

AGND1

GND pin of on-chip clock drive circuit.

Connect to GND.

22(28)

AGND2

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

Connect to GND.

23(29)

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

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

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

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

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

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 ( ).

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

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