JPH099314A - Radio selective calling receiver with display device - Google Patents

Abstract

PURPOSE: To allow the pager to have provision for each function request by customers without increasing a device size uselessly other than replacement of a ROM and a RAM on the manufacture. CONSTITUTION: The pager consisting of one-chip IC including a ROM and a RAM is provided with a printed circuit board having RAM pads 3a, 3b and ROM pads 2a, 2b in which other RAM than the former RAM and other ROM than the former ROM are mounted selectively in the same mount area and externally mounted to the IC. The RAM pads 3a, 3b and the ROM pads 2a, 2b are arranged so that the center position of the additional RAM and ROM is aligned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective call receiver (hereinafter referred to as a pager), and particularly to a temporary storage means (hereinafter referred to as a RAM) for storing message data and the like, and a program for controlling the pager. The present invention relates to a pager with a display that can be used for multiple functions by using a read-only storage unit (hereinafter, referred to as a ROM) that stores the.

[0002]

2. Description of the Related Art Recently, the degree of integration of integrated circuits (hereinafter referred to as ICs) has increased, and decoders, CPUs, ROMs, and RAMs necessary for controlling pagers have been integrated into one IC, so-called special-purpose ICs ( Applicatio
n Specific IC (ASIC) 1
Chips are becoming popular. But the size of the IC,
Due to the limitation of input / output terminals, not all pagers are integrated into one chip. Further, the pager has specifications such as a pager with a small function, a pager with a medium size and a large scale, etc., depending on the function scale and the request from the customer. Although there are differences in their functional scale, the same ASIC is often used in the control portion of all these pagers to simplify manufacturing.

In the case of a pager having a relatively small function, it can be realized by the IC1 chip as described above.
The pager is constructed using the ROM and RAM in C. Since ROM and RAM are provided in the limited IC space, ROM capacity of 320 kilobits and RAM capacity of 16 kilobits cannot be obtained. Therefore, since the program area is small and the message memory capacity is relatively small, the function is small.

On the other hand, in the case of a pager having a large-scale function, A
ROM and RAM of the above-mentioned scale contained in SIC
Then, I'm not satisfied with the external attachment, for example, R with a capacity of 2 megabits.
An OM and a RAM having a capacity of 64 kilobits are provided so that the program area and the message memory capacity can be made very large.

In the case of a pager having a medium-scale function, A
SIC alone is not enough and either ROM or RAM is needed. Which one to use depends on the functional requirements of the customer. So for this medium-sized pager,
The printed wiring board on which the components are mounted has the ROM and RAM mounting areas and the mounting patterns separately provided. The separate mounting patterns are provided because the sizes of components differ depending on the memory capacity, and the ROM and RAM have slightly different terminal arrangements.

[0006]

In the case of this conventional medium-scale pager, the size of components differs depending on the memory capacity, and the ROM and RAM have slightly different terminal arrangements.
The printed wiring board on which the components are mounted is provided with the ROM and RAM mounting areas and mounting patterns separately. Therefore, when an additional ROM is used to meet the customer's functional requirements, the RAM mounting area on the printed wiring board is wasted, while
When the RAM is added, the mounting area of the ROM is wasted and the mounting efficiency becomes very poor. As a result, there is a problem in that the size of the printed wiring board increases and the device size also increases. In addition, when mounting components, there is a manufacturing problem that the mounting program must be changed because the ROM and RAM mounting positions are different.

The object of the present invention is to provide the same mounting area and mounting pattern on the printed wiring board so that either the added ROM or RAM can be selectively used in a pager of medium-scale function. The object of the present invention is to provide a wireless selective call receiver with a display that does not unnecessarily increase the device size in response to a function request for each customer.

Another object of the present invention is to arrange the pads on the printed wiring board so that the center positions for mounting the ROM and the RAM are aligned with each other.
It is an object of the present invention to provide a radio selective call receiver with a display that enables mounting of parts that are highly flexible in manufacturing.

[0009]

A radio selective call receiver with a display according to the present invention receives a radio signal containing message data and demodulates it, and decodes the signal demodulated by the radio unit. A decoder that outputs the message data when it is identified that the call is addressed to itself, a ROM that stores a program for controlling the radio selective call receiver in advance, and a message data that is output from the decoder The CPU that controls writing and reading by the program, and the message data by the C
RAM for storing or outputting under the control of PU
In a radio selective call receiver with a display, which comprises a control unit configured by a 1-chip IC, and
In order to expand the storage area of the received message, R
One of the first storage means provided separately from the AM and the second storage means provided separately from the ROM for expanding the storage area of the program for adding the function of the radio selective call receiver is selected in the same mounting area. A printed wiring board that can be mounted physically, and the printed wiring board has a wiring pattern that shares the mounting area of the first and second storage means.

Since the printed wiring board mounts the first or second storage means, the printed wiring board for the first and second storage means is arranged so that the center positions of these storage means coincide with each other. Equipped with a pad.

[0011]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.
(A) is a diagram showing a pager using a RAM externally attached to the ASIC, and (b) is a RO externally attached to the ASIC.
It is a figure which shows the pager which used M.

In FIG. 1A, a pager includes an antenna 1 for receiving a radio signal, a radio unit 2 for demodulating a radio signal including message data received by the antenna 1,
A decoder 3 that decodes the signal demodulated by the wireless unit 2 and outputs the message data received when it is identified that the call is addressed to its own station, and a ROM 4 that stores a program for controlling the pager in advance. And the message data output from the decoder 3 is written and read by the program stored in the ROM 4, and is controlled by C
PU5, RAM6 for storing or outputting message data under the control of CPU5, ID-ROM8 for storing the selective call number of its own station and system information peculiar to the pager in advance, and in the received wireless signal An LCD 10 is provided for displaying the message data when the message data is included, and an LCD driver 9 for driving the LCD 10 under the control of the CPU 5. The control unit 7 is configured by integrating the decoder 3, the ROM 4, the CPU 5, and the RAM 6 into a single chip, and is a so-called ASIC.
Is called. The received message data is stored in the RAM 6 in the control unit 7 or an externally attached RAM 11 having a capacity of 64 kilobits, for example. In FIG. 1, the selective calling signal of the own station is compared with the selective calling signal included in the received data, and if they match, a notification unit for notifying the owner of the pager with sound or vibration is omitted. . The RAM 1 shown in FIG. 1B is different from that shown in FIG.
1 is the same except for the ROM 12 having a capacity of 2 megabits for storing the additional program,
Description is omitted.

Here, the manufacturer judges from the customer's specifications as to which one of the RAM 11 and the ROM 12 is to be used. When the message memory capacity is important, the RAM 11 is selected, and the program area is selected. When importance is attached to the ROM 12, the ROM 12 is selected. Therefore, the printed wiring board of the pager has been devised as follows.

FIG. 2 is a diagram showing an example of a wiring example of a mounting pattern of a printed wiring board common to ROM and RAM, and FIG.
FIG. 3 is a diagram showing an example of an actual printed wiring board pattern in FIG. 2. In FIG. 2, the smaller IC is RA
M, for example SRM2564TM, with a capacity of 64 kilobits and TSOP 28 pins (pin pitch 0.55 mm). The larger IC is a ROM and has a capacity of 1 megabit and TSOP 32 pins (pin pitch 0.5 mm). As shown in FIG. 2, address buses (A0, A1, A2 ...) Of ROM and RAM, data bus (O
0, O1, O2 ...), power supply lines, and ground lines have very similar pin arrangements, and wirings 4a and 4b as shown in FIG. 2 are possible. Regarding the control lines, the lines related to the read can be shared, and the control lines related to the write of the RAM are independent lines only for the RAM. These are wired between the ROM pad 2a and the RAM pad 3b (partly between the RAM pads 3).
Wiring is provided between the OM pad 2b and the RAM pad 3a.

The pattern diagram of FIG. 3 shows the wiring of FIG. 2 in a mounting pattern of a printed wiring board.
RAM 64 kilobit 28-pin package, RO
Since the package size is smaller than that of the M1 megabit 32-pin package, it can be sufficiently inserted in the ROM mounting pad. Therefore, the address bus, the data bus, the control line related to the write, the power supply line, and the ground line which can be commonly used in the wiring are used as pads 2a and 2b for ROM and pads 3a and 3 for RAM.
It will be tied with b. Then, a ROM / RAM common pattern is created. After that, the pattern that comes out from the outside of the ROM (the larger one) is connected to the ASIC, and it is completed.

By providing the wiring pattern sharing the mounting area of the ROM and the RAM on the printed wiring board of the pager as described above, the mounting area can be effectively used, the mounting efficiency can be improved, and the size of the pager can be reduced. . Further, it is possible to easily change the function of the pager. Further, if the parts center positions of the ROM and the RAM are set to be the same, it is possible to share the mounting program for mounting the parts. That is, it becomes possible to mount components without changing the mounting program.

[0017]

As described above, the decoder and RO
A radio selective call receiver with a display according to the present invention, which includes a control unit configured by M, RAM and CPU in a one-chip IC, is externally attached to the one-chip IC and is in a one-chip for expanding a storage area of a message to be received. The first storage means different from the RAM and the second storage means different from the ROM in one chip to expand the storage area of the program for adding the pager selectively in the same mounting area. By providing a possible printed wiring board, the mounting efficiency of the pager on the printed wiring board is significantly improved, and the size of the pager can be reduced. Further, this printed wiring board is provided with the pads for the respective storage means arranged so that the center positions of the above-mentioned first and second storage means coincide with each other, so that the component mounting program is not changed. These storage means can be installed.

Therefore, the pager can cope with the function request for each customer without unnecessarily increasing the size of the device and the manufacturing process without any change other than the above-mentioned change of the storage means.

[Brief description of drawings]

FIG. 1A is a configuration diagram showing a pager using a RAM externally attached to an ASIC according to an embodiment of the present invention.
(B) R is externally attached to the ASIC of one embodiment of the present invention
It is a block diagram which shows the pager which used OM.

FIG. 2 is a diagram showing an example of a wiring array of a mounting pattern of a printed wiring board common to ROM and RAM.

3 is a diagram showing an example of a pattern of an actual printed wiring board in FIG.

[Explanation of symbols]

 1 Antenna 2 Radio part 3 Decoder 4,12 ROM 5 CPU 6,11 RAM 7 Control part 8 ID-ROM 9 LCD driver 10 LCD 2a, 2b ROM pad 3a, 3b RAM pad 4a-4d Wiring

Claims (3)

[Claims] 1. A radio unit for receiving and demodulating a radio signal including message data, and decoding the signal demodulated by the radio unit, and for identifying the message data when the call is addressed to the own station. ROM that stores a decoder for outputting and a program for controlling the radio selective calling receiver in advance
And a CPU that controls writing and reading of the message data output from the decoder by the program,
A radio selective calling receiver with a display, comprising: a control unit configured by a one-chip IC; a RAM for storing or outputting the message data under the control of the CPU; Any of a first storage means provided separately from the RAM for expanding the storage area and a second storage means provided separately from the ROM for expanding the storage area of the program for adding the function of the radio selective calling receiver. A radio selective calling receiver with a display, comprising a printed wiring board capable of selectively mounting the same in the same mounting area. 2. The radio selective call receiver with a display according to claim 1, wherein the printed wiring board has a wiring pattern sharing the mounting area of the first and second storage means. 3. The printed wiring board for mounting the first or second storage means, therefore, for the first and second storage means arranged so that the center positions of these storage means coincide with each other. The radio selective call receiver with a display according to claim 1 or 2, further comprising a pad.