UPD17062 datasheet(87/296 Pages) NEC

Part #	UPD17062

Description	4-BIT SINGLE-CHIP MICROCONTROLLER CONTAINING PLL FREQUENCY SYNTHESIZER AND IMAGE DISPLAY CONTROLLER

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Manufacturer	NEC [NEC]

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87 / 296 page

87

µPD17062

9.26

SHIFT CLOCK FREQUENCY SETTING (39H)

9.27

IRQNC (3FH)

IRQNC is an interrupt request flag that indicates the interrupt request state.

When an interrupt request is generated, the flag is set to 1. When the request is accepted (interrupt is made),

the flag is reset to 0.

The interrupt request flag can be read and written by the program. Hence, if 1 is written, an interrupt by

software can be generated. If 0 is written, the interrupt hold status can be released. The IRQNC flag becomes

0 upon reset.

b3

b2

b1

b0

SIO0CK3

SIO0CK2

SIO0CK0

39H

SIO0CK1

00

01

10

11

100 kHz

200 kHz

500 kHz

1 MHz

Fixed at 0

Internal clock frequency

Flag name

Bit position

Interrupt source

IRQNC

b0

INTNC pin

IRQBTM0

b1

Clock timer

IRQVSYN

b2

VSYNC pin

IRQSIO0

b3

Serial interface

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UPD17062 Datasheet(PDF) 87 Page - NEC

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