UPD17P068 datasheet(10/36 Pages) NEC

Part #	UPD17P068

Description	4-BIT SINGLE-CHIP MICROCONTROLLER WITH ON-CHIP HARDWARE FOR TV SYSTEMS

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Manufacturer	NEC [NEC]

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10 / 36 page

10

µPD17P068

(2) Non-port pins

Pin Name

Description

I/O

Output Type

When Reset

Shared by

This pin outputs signals from the charge

pump of the PLL frequency synthesizer.

If the frequency divided from the local

EO

oscillator (VCO) frequency is higher (lower)

O

CMOS 3-state

High-impedance

—

than the reference frequency, high (low)

level is output from this pin, respectively.

When the two frequencies match, this pin

is placed in the high-impedance state.

This pin outputs pulse swallow control

PSC

signal. This signal switches division ratio

O

CMOS push-pull

Output

—

for the dedicated prescaler

µPB595.

This pin is the input of the local oscillator.

The output signal coming from the local

oscillator (VCO) in the tuner and divided by

VCO

the dedicated prescaler

µPB595 should be

I

—

input to this pin, where the

µPB595 is a

two-module prescaler capable of frequency

division up to 1 GHz.

This pin is the input of the H sync signal

HSCNT

I

—

Input

P0B3

counter.

This active-high pin outputs blanking

BLANK

O

CMOS push-pull

Low level output

—

signals to delete video signals.

This active-high pin outputs character

RED

data that correspond the R signal (one of

O

CMOS push-pull

Low level output

—

the RGB signals of IDC).

This active-high pin outputs character data

GREEN

that correspond the G signal (one of the

O

CMOS push-pull

Low level output

—

RGB signals of IDC).

This active-high pin outputs character data

BLUE

that correspond the B signal (one of the

O

CMOS push-pull

Low level output

—

RGB signals of IDC).

This pin outputs character data that

I

O

CMOS push-pull

Input

P0B2

correspond the I signal of IDC.

The H sync signals for IDC should be

HSYNC

I

—

Input

—

input to this pin in an active-low manner.

The V sync signals for IDC should be input

VSYNC

I

—

Input

—

to this pin in an active-low manner.

These are the input and output pins of the

LC oscillation circuit for IDC. Adjust the

—

oscillation frequency to 10 MHz.

These are the analog input pins of the

I

—

Input

6-bit resolution A/D converter.

These are the analog input pins of the

I

—

Input

6-bit resolution A/D converter.

—

P0D0/XTOUT

P0D1/XTIN

P0D2

P0D3

P1C0



P1C2

OSCIN

OSCOUT

ADC0

ADC1

ADC2

ADC3

ADC4

ADC5



ADC7

Internally

pulled down

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UPD17P068 Datasheet(PDF) 10 Page - NEC

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