JPS6458043A - Microcomputer incorporating a/d and d/a converters - Google Patents
Microcomputer incorporating a/d and d/a convertersInfo
- Publication number
- JPS6458043A JPS6458043A JP62215612A JP21561287A JPS6458043A JP S6458043 A JPS6458043 A JP S6458043A JP 62215612 A JP62215612 A JP 62215612A JP 21561287 A JP21561287 A JP 21561287A JP S6458043 A JPS6458043 A JP S6458043A
- Authority
- JP
- Japan
- Prior art keywords
- cpu
- signal
- level
- conversion
- stop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Microcomputers (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To decrease the noises and to ensure the accurate conversion with A/D and D/A converters, by stopping the operations of circuits except the converters during the A/D and D/A conversions. CONSTITUTION:When a CPU 3 outputs the address allocated to an A/D converter 2 to an address bus 5, the converter 2 is selected and an A/D selection signal 7 becomes active to be changed to an H level from an L level. An edge detecting circuit 4 detects the leading edge when the signal 7 is changed to an H level from an L level and gives a CPU stop signal 8 to the CPU 3 to request the stop of operation of the CPU 3. The CPU 3 receives the signal 8 and is set under a stop mode. At the same time, the CPU 3 outputs an A/D conversion start signal 11 for the start of the A/D conversion. When the A/D conversion is through, the signal 7 is nonactive and changed again to an L level from an H level. The circuit 4 detects this change and gives a stop releasing signal 9 to the CPU 3. The CPU 3 receives the signal 9 and restarts its operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62215612A JPS6458043A (en) | 1987-08-28 | 1987-08-28 | Microcomputer incorporating a/d and d/a converters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62215612A JPS6458043A (en) | 1987-08-28 | 1987-08-28 | Microcomputer incorporating a/d and d/a converters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6458043A true JPS6458043A (en) | 1989-03-06 |
Family
ID=16675299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62215612A Pending JPS6458043A (en) | 1987-08-28 | 1987-08-28 | Microcomputer incorporating a/d and d/a converters |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6458043A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991020051A1 (en) * | 1990-06-11 | 1991-12-26 | Oki Electric Industry Co., Ltd. | Microcomputer provided with built-in converter |
| JPH0415070U (en) * | 1990-05-23 | 1992-02-06 | ||
| JPH04328624A (en) * | 1991-04-30 | 1992-11-17 | Toshiba Corp | Analog-digital mixed integrated circuit |
| US5640161A (en) * | 1991-05-29 | 1997-06-17 | Pacific Microsonics, Inc. | Silent data conversion system with sampling during electrical silence |
| US6300889B1 (en) * | 2000-06-19 | 2001-10-09 | Cygnal Integrated Products, Inc. | System on chip with ADC having serial test mode |
-
1987
- 1987-08-28 JP JP62215612A patent/JPS6458043A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0415070U (en) * | 1990-05-23 | 1992-02-06 | ||
| WO1991020051A1 (en) * | 1990-06-11 | 1991-12-26 | Oki Electric Industry Co., Ltd. | Microcomputer provided with built-in converter |
| US5307066A (en) * | 1990-06-11 | 1994-04-26 | Oki Electric Industry Co., Ltd. | Microprocessor controlled converter having reduced noise interference and method of operating same |
| EP0487743B1 (en) * | 1990-06-11 | 1998-09-09 | Oki Electric Industry Company, Limited | Microcomputer provided with built-in converter |
| JPH04328624A (en) * | 1991-04-30 | 1992-11-17 | Toshiba Corp | Analog-digital mixed integrated circuit |
| US5640161A (en) * | 1991-05-29 | 1997-06-17 | Pacific Microsonics, Inc. | Silent data conversion system with sampling during electrical silence |
| US6300889B1 (en) * | 2000-06-19 | 2001-10-09 | Cygnal Integrated Products, Inc. | System on chip with ADC having serial test mode |
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