JPH05327592A - Selective call receiver - Google Patents

Abstract

PURPOSE:To eliminate the need for the write of data to a respective calling number storage means for inspection and to shorten inspection time by making the output data of an EEPROM an 'H' state in all addresses and leaving the data as they are even after the manufacture of the receiver in the selective call receiver. CONSTITUTION:In the conventional selective call receiver, respective calling numbers and an inspection mode have to be written in an EEPROM and a lot of time is required for setting them. Then, in order to avoid it, the region of the respective calling number storage means for storing the respective calling number is checked, the data for the inspection are not written again when the region is the specified data, that is, the all addresses are in the 'H' state and the inspection mode is proceeded.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a selective call receiver. In particular, it relates to the inspection means of the receiver.

[0002]

2. Description of the Related Art Selective call receivers are equipped with a battery saving function for effectively utilizing a power source. However, it is necessary to stop the battery saving operation when adjusting or inspecting each part of the receiver.
As described above, by receiving a specific pattern from the transmitter, a method of shifting to the inspection mode (test mode) or a reception using an electrically erasable / erasable EEPROM in the individual call storage means In the machine, EE
Individual calling number in PROM and inspection mode (test mode)
This function is provided by writing (setting). Further, since the receivers all have different individual call numbers for measuring the reception characteristics, it was also necessary to change the call numbers by the test encoder each time the receiver was changed.

[0003]

However, in the conventional selective call receiver, it is necessary to write the individual calling number and the inspection mode in the EEPROM, and it takes a lot of time to set them. It was Therefore, in the present invention, the area for storing the individual calling number of the individual calling number storage means is checked, and if specific data (all addresses are "H"), the mode is shifted to the inspection mode, and the inspection is performed. Therefore, there is no need to write data in the individual calling number storage means for the purpose of shortening the inspection time.

[0004]

SUMMARY OF THE INVENTION A selective call receiver according to the present invention receives a transmission signal in which each of a plurality of groups is composed of a plurality of call codes, synchronizes them, and assigns a call assigned to itself. In a selective call receiver which operates by selecting only a group to which a code belongs, an individual call number storage means for storing at least the call number assigned to the self and a specific number in the individual call number storage means are detected. It is characterized in that the specific code detecting means and the inspection mode for inspection when the specific code detecting means detects the specific number.

[0005]

In general, in the EEPROM, the output data when the IC is shipped is "H" at all addresses. Therefore, it is in this state after the receiver is manufactured, and when this data is detected, it is forcibly shifted to the inspection mode.

[0006]

The details of the present invention will be described below with reference to Examples. FIG. 1 is a block diagram of a selective call receiver according to the present invention. A desired radio frequency is demodulated by a radio unit 2 including a discriminator via a built-in antenna 1 and converted into a rectangular wave by a waveform shaping circuit 3. The power supply control circuit 4 that supplies power to the wireless unit 2 and the waveform shaping circuit 3 is controlled by the control unit 5. The power supply control circuit 4 has means for supplying power to the wireless unit 2 in order to receive a preamble signal, a sync signal, an address signal (individual call data) and an information signal (message data). The control unit 5 has bit synchronization with the received signal, frame synchronization, a battery saving means for reducing power consumption such as the wireless unit 2, and an EEPROM 6 (where the address signal from the wireless unit 2 and the individual calling number of the receiver are written. The comparison with the data from the individual calling number storage means) is carried out with error control, and the comparison means for judging whether or not it is called is controlled.

When a match with the individual calling number is confirmed, the information signal that follows is stored in the memory 9 (storage means) and used by the alarm device 8 such as a buzzer, an LED or a vibrator via the alarm drive circuit 7. Notify the person that the call was made. The stored message is sent to the LCD drive circuit 10 via the control unit 5 by the external operation member 13 including switches, and is displayed on the LCD display 12. A clock signal is sent from the crystal oscillation circuit 11 to the control unit 5 and the LCD drive circuit 10. Power supply control circuit 4, control unit 5, memory 9, LCD drive circuit 10
The message processing unit 14 including the oscillation circuit 11 and the oscillation circuit 11 is configured by a one-chip microcomputer. A battery 15 supplies power to the selective call receiver through a power switch which is a part of the external operation member 13.

FIG. 2 is a flow chart of the test mode setting of the present invention. When the power of the battery is supplied to the selective call receiver via the power switch, the power switch is turned on.
? By the judgment of "(step 21), the process proceeds to the reading of the EEPROM for reading the data in the individual calling number storage means" (step 22). The read data is stored in the memory. Then, a "specific address" (step 23) for checking whether the data in the area in which the individual calling number is written is specific data is executed.

The specific address in the embodiment means "H" at all addresses. For example POCSAG
When the system has only one individual calling number, a 21-bit address is the contrast. In the EEPROM, output data at the time of IC shipment is "H" at all addresses.
Therefore, after manufacturing the receiver, "H" is displayed at all addresses.
Therefore, the process proceeds to "set test mode" (step 24) for determining the specific address and setting the test mode.
The test mode set flags the test mode. Next, the battery saving function is stopped. Go to "Cancel battery saving" (step 25) and click "EN".
D "(step 28) is set and the test mode is set.

If it is not determined that the address is the specific address, the process proceeds to "cancel test mode" (step 26) for resetting the test mode flag. Then, "set battery saving" (step 27) for operating the battery saving function is executed and becomes "END" (step 28), and the test mode is reset.

In this way, when nothing is written in the individual calling number means, the test mode is set, and when the individual calling number is written, it operates as a normal selective calling receiver.

The specific address is not limited to "H" at all addresses, but may be "L" at all addresses, for example.

The specific addresses are "H" and "L".
It is also possible to provide both of the detection means and to operate when either of them is detected.

FIG. 3 is a flowchart of the receiving process according to the present invention. When the preamble signal is detected during the operation of the receiver after the power is turned on and bit synchronization is established (step 30), the process proceeds to "test mode?" (Step 31) for checking the test mode flag. When the test mode is not set, the normal processing is performed "normal processing" (step 3).
Proceed to 2). The normal processing is to compare the data with the calling number written in the individual calling storage means to judge whether or not the calling is performed. When the call is confirmed, the message signal sent subsequently is detected and processed, and the speaker or LED is driven to notify the wearer of the call. Then, the process proceeds to "END" (step 35) and ends.

In the test mode, regardless of the calling number written in the individual calling storage means, the calling number becomes a common calling number to all receivers with a fixed calling number "2018520 (decimal)". And compare the data to determine if it was called.
RIC match? When the call is confirmed, the message signal sent subsequently is detected and processed, and the speaker and LED are driven for 1 second so as not to affect the next reception. Proceed to "Time ringing" (step 34). Then "END" (step 3)
Proceed to step 5) to end. Then, prepare for the next reception.

[0016]

As described above, according to the present invention, the inspection mode is set until the individual call number is written in the individual call storage means after the receiver is manufactured, and the purpose is to write or replace the individual call storage means. This has the effect that a series of inspections can be performed easily and efficiently without any need.

[Brief description of drawings]

FIG. 1 is a block diagram of a selective call receiver of the present invention.

FIG. 2 is a flowchart of test mode setting according to the present invention.

FIG. 3 is a flowchart of a reception process according to the present invention.

[Explanation of symbols]

 2 ... Radio unit 4 ... Power supply control 5 ... Control unit 6 ... EEPROM 9 ... Memory 10 ... LCD drive circuit 13 ... External operation member 14 ...・ Message processing unit 15 ・ ・ ・ Battery

Claims (1)

[Claims] 1. A selective call in which each of a plurality of groups receives a transmission signal composed of a plurality of call codes and synchronizes with each other, and selects and operates only a group to which a call code assigned to itself is selected. In the receiver, the individual call number storage means for storing at least the call number assigned to itself, the specific code detection means for detecting the specific number of the individual call number storage means, and the specific code detection means are specified. A selective call receiver characterized by transitioning to an inspection mode for inspection when a number is detected.