 |
Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
|
Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
ATmega16U2 Datasheet(PDF) 38 Page - ATMEL Corporation |
|
||||||||||||||||||||||||||||||
ATmega16U2 Datasheet(HTML) 38 Page - ATMEL Corporation |
|
|
38 / 314 page  38 7799B–AVR–07/09 ATmega8U2/16U2/32U2 lator is selected by the fuse bits configuration. The firmware has to check if the clock is correctly started before selected it. 8.11.2 CLKSEL1 – Clock Selection Register 1 • Bit 7:4 – RCCKSEL[3:0]: CKSEL for RC oscillator Clock configuration for the RC Oscillator. After a reset, this part of the register is loaded with the 0010b value that corresponds to the RC oscillator. Modifying this value by firmware before switching to RC oscillator is prohibited because the RC clock will not start. • Bit 3:0 – EXCKSEL[3:0]: CKSEL for External oscillator / Low Power Oscillator Clock configuration for the External Oscillator / Low Power Oscillator. After a reset, if the Exter- nal oscillator / Low Power Oscillator is selected by fuse bits, this part of the register is loaded with the fuse configuration. Firmware can modify it to change the start-up time after the clock switch. 8.11.3 CLKSTA – Clock Status Register • Bit 7:2 - Res: Reserved bits These bits are reserved and will always read as zero. • Bit 1 – RCON: RC Oscillator On This bit is set by hardware to one if the RC Oscillator is running. This bit is set by hardware to zero if the RC Oscillator is stoped. • Bit 0 – EXTON: External Oscillator / Low Power Oscillator On This bit is set by hardware to one if the External Oscillator / Low Power Oscillator is running. This bit is set by hardware to zero if the External Oscillator / Low Power Oscillator is stoped. 8.11.4 OSCCAL – Oscillator Calibration Register • Bits 7:0 – CAL[7:0]: Oscillator Calibration Value The Oscillator Calibration Register is used to trim the Calibrated Internal RC Oscillator to remove process variations from the oscillator frequency. A pre-programmed calibration value is automatically written to this register during chip reset, giving the Factory calibrated frequency as specified in Table 26-1 on page 266. The application software can write this register to change Bit 7 6 5 4 32 10 (0xD1) RCCKSE L3 RCCKSE L2 RCCKSE L1 RCCKSE L0 EXCKSE L3 EXCKSE L2 EXCKSE L1 EXCKSE L0 CLKSEL1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0 0 1 0 0 0 0 0 Bit 7 654 3 2 1 0 (0xD2) - - - - - - RCON EXTON CLKSTA Read/Write R R R R RR RR Initial Value 0 0 0 0 See Bit Description Bit 76543210 (0x66) CAL7 CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0 OSCCAL Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value Device Specific Calibration Value |
Número de pieza similar - ATmega16U2 |
|
Descripción similar - ATmega16U2 |
|
|
Enlace URL |
| Política de Privacidad |
| ALLDATASHEET.ES |
| ¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Spanish ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
