. AVR .
2.17.
| CKSEL3..0 | |
| / | 1111 1010 |
| RC- | 1000 0101 |
| RC- | 0100 0001 |
. 1 , 0 .
. CPU (Power-down) (Power-save) , , . , (reset), . , . 2.18.
2.18.
| (VCC = 5.0) | (VCC = 3.0) | |
| 4.1 | 4.3 | 4K (4096) |
| 65 | 69 | 64K (65536) |
. CKSEL = 0001 SUT = 10. RC- . .
. XTAL1 XTAL2 , , , (. 2.15). . CKOPT . CKOPT , . XTAL2 . . CKOPT , . , XTAL2 .
|
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 |
. 2.15.
8 , CKOPT , 16 , CKOPT- . C1 C2 . , . . 2.13. , .
2.19.
| CKOPT | CKSEL3..1 | , | C1 C2 |
| 0.4-0.9 | - | ||
| 0.9-3.0 | 12-22 | ||
| 3.0-8.0 | 12-22 | ||
| 101, 110, 111 | 1.0- | 12-22 |
.
1. . .
2. , .
CKSEL0 SUT1..0 . 2.20.
2.20.
| CKSEL0 | SUT1..0 | (VCC= 5.0) | ||
| 258 CK | 4.1 | , | ||
| 258 CK | 65 | , | ||
| 1K CK | , (BOD) | |||
| 1K CK | 4.1 | , | ||
| 1K CK(2) | 65 | , | ||
| 16K CK | , (BOD) | |||
| 16K CK | 4.1 | , | ||
| 16K CK | 65 | , |
.
1. , , , . .
2. . , , , , .
. 32.768 CKSEL 1001. . 2.15. XTAL1 XTAL2, . 36 . , SUT . 2.21.
|
|
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2.21.
| SUT1..0 | (VCC= 5.0) | ||
| 1K CK | 4.1 | BOD | |
| 1K CK | 65 | ||
| 32K CK | 65 | ||
. , .
RC-. RC-, . 2.16. f = 1/(3RC). C 22 . CKOPT 36 XTAL1 GND, , .
, . CKSEL3..0 (. . 2.22).
2.22. RC-
| CKSEL3..0 | , |
| 0 - 0.9 | |
| 0.9 - 3.0 | |
| 3.0 - 8.0 | |
| 8.0 - 12.0 |
(. . 2.23).
2.23. RC-
| SUT1..0 | (VCC= 5.0) | ||
| 18 CK(1) | - | BOD | |
| 18 CK | 4.1 | ||
| 18 CK | 65 | ||
| 6 CK (1) | 4.1 | BOD |
. .
RC-. RC- 1.0, 2.0, 4.0 8.0 . 5 25C. , CKSEL . 2.24. . CKOPT , RC-. OSCCAL, RC-. 5, 25C 1.0 3% . 1% VCC. .
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2.24. RC-
| CKSEL3..0 | , |
| 1.0 | |
| 2.0 | |
| 4.0 | |
| 8.0 |
. CKSEL3..0=0001.
SUT (. . 2.25). XTAL1 XTAL2 (NC).
2.25. RC-
| SUT1..0 | (VCC= 5.0) | ||
| 6 CK | - | BOD | |
| 6 CK | 4.1 | ||
| 6 CK | 65 | ||
.
SUT1..0= 10
OSCCAL. ( OSCCAL ATmega103).
7..0 CAL7..0. . . 1 ( ) OSCCAL. RC- , . , - EEPROM. , , OSCCAL. OSCCAL , . . $FF . EEPROM -. EEPROM - 10% . , EEPROM - . , 1.0, 2.0, 4.0 8.0 .
. , XTAL1 (. 2.16). CKSEL 0000. CKOPT, XTAL1 GND 36 .
SUT . 2.26.
2.26.
| SUT1..0 | (VCC= 5.0) | ||
| 6 CK | - | BOD | |
| 6 CK | 4.1 | ||
| 6 CK | 65 | ||
. 2% , . .
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-. AVR .
- SFIOR
| TSM | - | - | - | ACME | PUD | PSR0 | PSR321 | |
| R/W | R/W | R | R | R | R/W | R/W | R/W | R/W |
7 TSM. -. TSM -. PSR0 PSR321 . , - . TSM, PSR0 PSR321 , - .
6-4. .
3 ACME. . - (ADEN=0 ADCSRA) 1, . 0 AIN1.
2 PUD. PUD .
1 - PSR0. - 0. , - 0 . . , - 0 , 1 - 0. , TSM=1.
0 PSR321. - 1, 2 3. - 1, 2 3. , TSM. , - 1, 2 3 .
1. . . . .
2. .
3. . . .
4. .
5. .
6. .
7. XMCRA
8. ?
9. ?
10. .
11. EEPROM?
12. EEPROM. EEPROM.
13. EEPROM EEARH, EEARL . EEARH, EEARL.
14. EEDR- (EEDR) EEPROM . EEDR.
15. EEPROM EECR . .
16. () () EEPROM? .
17. EEPROM.
18. ( ) EEPROM.
19. .
20. . .
21. .
22. . .
23. . .
