D1723GF datasheet(18/80 Pages) NEC

18 / 80 page

µPD1723GF-013, µPD1723GF-213

1.4

DESCRIPTION OF KEY MATRIX

1.4.1

Initialize Diode Matrix

The initialize diode matrix contains the switches shown below. These switches are read only when power

is applied to the VDD pin for the first time (power ON reset) and when the CE pin changed from low level to high

level (CE reset). Otherwise, they are ignored.

(1) Receiving area setting switches

AREA1, AREA2, AREA3

(2) Receiving band setting switches

DISFM3, ENMW2, DISLW

(3) Auto memory setting switch

DISAMEMO

(4) IF counter setting switches

ENFMIF, DISAMIF

(5) Preset memory operation setting switch

M2S

(6) Tuning operation setting switch

AUTO500

(7) Display priority setting switches

PRIO1, PRIO2

(8) Radio ON/OFF method setting switch

RDON

(9) Clock function setting switches

NOCLK, CLKDISP, FLASH

(10) Tape function setting switches

ENTPK, KAMS, KNR, KMTL, ENNR2

(11) Muting output setting switch

MUTESEL

(12) Local operation setting switch

AUTOLOCK

Set these switches by shorting them with a diode on the matrix or leave them open. In the following text,

1 signifies shorting by diode and 0 signifies leaving open.

D1723GF Datasheet(PDF) 18 Page - NEC