JPH0482760U

JPH0482760U -

Info

Publication number: JPH0482760U
Application number: JP1990123837U
Authority: JP
Priority date: 1990-11-26
Filing date: 1990-11-26
Publication date: 1992-07-17

Description

[Brief explanation of the drawing]

第１図は本考案の第１の実施例を示すＥＥＰＲ
ＯＭ内蔵マイコンを搭載したＩＣカードの概略の
構成図、第２図は従来のＥＥＰＲＯＭ内蔵マイコ
ンを搭載したＩＣカードの概略の構成図、第３図
は本考案の第２の実施例を示すＥＥＰＲＯＭ内蔵
マイコンを搭載したＩＣカードの要部の構成図で
ある。３０……コネクト部、３１……電源端子、３５
……グランド端子、４０……マイクロプロセツサ
（ＭＰＵ）、４１……制御部、４１ａ……電流制
御手段、４１ｂ……オン、オフ設定手段、５０…
…昇圧回路、６０……ＥＥＰＲＯＭ、７０，７０
Ａ……電流パス手段７２……ＮＭＯＳ、７２Ａ…
…ＰＭＯＳ、Ａ_１〜Ａ_ｎ……制御信号、ＣＩ，Ｃ
Ｉａ……電流制御信号、ＣＭ……メモリ制御信号
、Ｍ_１〜Ｍ_ｎ……ＥＥＰＲＯＭ素子、Ｒ_１〜Ｒ_ｎ……抵抗素子、ＶＤＤ……電源電圧。 FIG. 1 shows an EEPR showing a first embodiment of the present invention.
Figure 2 is a schematic configuration diagram of an IC card equipped with a microcomputer with built-in OM. Figure 2 is a schematic diagram of an IC card equipped with a conventional microcomputer with built-in EEPROM. Figure 3 is an IC card with built-in EEPROM showing the second embodiment of the present invention. FIG. 2 is a configuration diagram of main parts of an IC card equipped with a microcomputer. 30...Connection part, 31...Power terminal, 35
...Ground terminal, 40...Microprocessor (MPU), 41...Control unit, 41a...Current control means, 41b...On/off setting means, 50...
...Booster circuit, 60...EEPROM, 70,70
A...Current path means 72...NMOS, 72A...
...PMOS, A ₁ to _{A n} ...control signal, CI, C
Ia...Current control signal, CM...Memory control signal, _M1 to _Mn ...EEPROM element, _R1 to _Rn ...Resistance element, VDD...Power supply voltage.

Claims

[Claims for Utility Model Registration] 1. A microprocessor that operates with a power supply voltage applied through a power supply terminal and a ground terminal and controls the entire microcomputer according to program instructions, and a device for writing data by the microprocessor. and EEPRO whose readout is controlled
A microcomputer with a built-in EEPROM, comprising: current control means that outputs a current control signal when reading the data; and a current control means that is turned on by the current signal to connect the power supply terminal to the power supply terminal. Form a current path between the ground terminals,
A microcomputer with a built-in EEPROM, comprising current path means for causing a current corresponding to a power supply current flowing during data writing to flow through the current path. 2. The EEPROM built-in microcomputer according to claim 1, wherein the current path means includes a switch that is turned on by the current control signal, and a plurality of devices connected in series between the power supply terminal and the ground terminal via the switch. comprising a resistor element and a plurality of short-circuit switch means connected in parallel to each of the resistor elements, and further includes an on/off setting means for setting each short-circuit switch means on or off. Microcomputer with built-in EEPROM.