Rainbow-electronics Atmega169L Manuel d'utilisateur télécharger pdf (Page 267)

267

ATmega169V/L

2514A–AVR–08/02

Note: 1. The SPIEN Fuse is not accessible in serial programming mode.

2. The default value of BOOTSZ1..0 results in maximum Boot Size. See Table 121 on

page 269 for details.

3. See “Watchdog Timer Control Register – WDTCR” on page 43 for details.

4. Never ship a product with the OCDEN Fuse programmed regardless of the setting of

Lock bits and JTAGEN Fuse. A programmed OCDEN Fuse enables some parts of

the clock system to be running in all sleep modes. This may increase the power

consumption.

Note: 1. The default value of SUT1..0 results in maximum start-up time for the default clock

source. See Table 16 on page 37 for details.

2. The default setting of CKSEL3..0 results in internal RC Oscillator @ 8 MHz. See

Table 6 on page 26 for details.

3. The CKOUT Fuse allow the system clock to be output on PORTE7. See “Clock Out-

put Buffer” on page 29 for details.

4. See “System Clock Prescaler” on page 30 for details.

The status of the Fuse bits is not affected by Chip Erase. Note that the Fuse bits are

locked if Lock bit1 (LB1) is programmed. Program the Fuse bits before programming the

Lock bits.

Table 119. Fuse High Byte

Fuse High

Byte

Bit

No Description Default Value

OCDEN

(4)

Enable OCD

1 (unprogrammed, OCD

disabled)

JTAGEN 6

Enable JTAG

0 (programmed, JTAG

enabled)

SPIEN

(1)

Enable Serial Program and Data

Downloading

0 (programmed, SPI prog.

enabled)

WDTON

(3)

4 Watchdog Timer always on 1 (unprogrammed)

EESAVE 3

EEPROM memory is preserved

through the Chip Erase

1 (unprogrammed, EEPROM

not preserved)

BOOTSZ1 2

Select Boot Size (see Table 121 for

details) 0 (programmed)

(2)

BOOTSZ0 1

Select Boot Size (see Table 121 for

details) 0 (programmed)

(2)

BOOTRST 0 Select Reset Vector 1 (unprogrammed)

Table 120. Fuse Low Byte

Fuse Low Byte Bit No Description Default Value

CKDIV8

(4)

7 Divide clock by 8 0 (programmed)

CKOUT

(3)

6 Clock output 1 (unprogrammed)

SUT1 5 Select start-up time 1 (unprogrammed)

(1)

SUT0 4 Select start-up time 0 (programmed)

(1)

CKSEL3 3 Select Clock source 0 (programmed)

(2)

CKSEL2 2 Select Clock source 0 (programmed)

(2)

CKSEL1 1 Select Clock source 1 (unprogrammed)

(2)

CKSEL0 0 Select Clock source 0 (programmed)

(2)

1 2 ... 262 263 264 265 266 267 268 269 270 271 272 ... 316 317

Commentaires sur ces manuels

Pas de commentaire

Rainbow-electronics Atmega169L Manuel d'utilisateur Page 267

Commentaires sur ces manuels

Produits connexes et manuels pour Capteurs Rainbow-electronics Atmega169L