TW200608173A - Clock control device and method thereof - Google Patents
Clock control device and method thereofInfo
- Publication number
- TW200608173A TW200608173A TW093125944A TW93125944A TW200608173A TW 200608173 A TW200608173 A TW 200608173A TW 093125944 A TW093125944 A TW 093125944A TW 93125944 A TW93125944 A TW 93125944A TW 200608173 A TW200608173 A TW 200608173A
- Authority
- TW
- Taiwan
- Prior art keywords
- clock signal
- clock
- signal
- control device
- control unit
- Prior art date
Links
Landscapes
- Microcomputers (AREA)
- Power Sources (AREA)
- Executing Machine-Instructions (AREA)
Abstract
This invention is related to a clock control device and the method thereof which is capable of providing a system clock signal to a microprocessor and peripheral units. The control device mainly includes: a clock generating unit for generating a first clock signal, a second clock signal; and a clock selection control unit for selecting of the first and second clock signals as the system clock signal. Under normal system operation, the first clock signal serves as the system clock signal. When the clock selecting control unit receives a power conservation signal delivered by the microprocessor, the second clock signal is selected as the system clock signal, until the clock selecting control unit receives a wake-up signal delivered by the peripheral units via hardware commands to re-select the first clock signal as the system clock signal. As such, the system clock system is controlled by the peripheral units in hardware manner to recover back to the first clock signal, so as to reduce the loading of the system firmware.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW93125944A TWI250395B (en) | 2004-08-27 | 2004-08-27 | Device and method of clock control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW93125944A TWI250395B (en) | 2004-08-27 | 2004-08-27 | Device and method of clock control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW200608173A true TW200608173A (en) | 2006-03-01 |
| TWI250395B TWI250395B (en) | 2006-03-01 |
Family
ID=37433016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW93125944A TWI250395B (en) | 2004-08-27 | 2004-08-27 | Device and method of clock control |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TWI250395B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI459178B (en) * | 2010-12-12 | 2014-11-01 | Mediatek Inc | Clock system and method used in a clock system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI382659B (en) * | 2006-09-29 | 2013-01-11 | Novatek Microelectronics Corp | Clock signal controlling devices and related methods |
| JP4681658B2 (en) | 2009-01-30 | 2011-05-11 | ザインエレクトロニクス株式会社 | Clock control circuit and transmitter |
-
2004
- 2004-08-27 TW TW93125944A patent/TWI250395B/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI459178B (en) * | 2010-12-12 | 2014-11-01 | Mediatek Inc | Clock system and method used in a clock system |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI250395B (en) | 2006-03-01 |
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