US 5,675,646 A · Method of writing identification number of electronic apparatus

Abstract

The present invention involves a method of writing an identification number of a CATV receiving apparatus and intends to achieve a rapid write operation and reduction in the capacity of a control program. A microcomputer (7) is reset in a first step (15) and a write pin (13) of a memory write unit (10) is brought into direct engagement with an input/output terminal (8a) of a memory (8) in a second step (16). Subsequently, in a third step (17), a preset identification number of the CATV receiving apparatus is written into the memory (8) through the write pin (13), so that the microcomputer (7) need not start any identification number write program and a rapid write operation can be ensured. No identification number write program is required for the microcomputer (7) and therefore, reduction in the capacity of the control program can be realized.

Claims10

Dependent claims

A method of writing an identification number of an electronic apparatus having an electrically writable memory device (hereinafter referred to as memory) and a microcomputer for controlling said memory, comprising:

a first step of resetting said microcomputer;
a second step of bringing a write pin of a memory write unit into engagement with an input/output terminal of said memory after the first step;
a third step of writing a preset identification number of said electronic apparatus into said memory through said write pin after the second step;
a fourth step of separating said write pin from said input/output terminal of said memory after the third step;
and
a fifth step of releasing said microcomputer from the resetting after the fourth step.

3 more elements

Dependencies are inferred from the claim text.

Method of writing identification number of electronic apparatus

Life of this patent

Method of writing identification number of electronic apparatus

Life of this patent

Abstract

Claims10