AT90PWM2 datasheet(290/365 Pages) ATMEL

290 / 365 page

290

AT90PWM2/3

4317B–AVR–02/05

Notes:

1. See “Alternate Functions of Port C” on page 73 for description of RSTDISBL Fuse.

2. The SPIEN Fuse is not accessible in serial programming mode.

3. See “Watchdog Timer Configuration” on page 54 for details.

4. See Table 15 on page 47 for BODLEVEL Fuse decoding.

Note:

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

source. See Table 10 on page 36 for details.

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

Table 10 on page 36 for details.

3. The CKOUT Fuse allows the system clock to be output on PORTB0. See “Clock Out-

put Buffer” on page 36 for details.

4. See “System Clock Prescaler” on page 37 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 121. Fuse High Byte

High Fuse Byte

Bit No

Description

Default Value

RSTDISBL

(1)

External Reset Disable

1 (unprogrammed)

DWEN

debugWIRE Enable

1 (unprogrammed)

SPIEN

(2)

Enable Serial Program and

Data Downloading

0 (programmed, SPI

programming enabled)

WDTON

(3)

Watchdog Timer Always

1 (unprogrammed)

EESAVE

EEPROM memory is

preserved through the

Chip Erase

1 (unprogrammed),

EEPROM not reserved

BODLEVEL2

(4)

Brown-out Detector

trigger level

1 (unprogrammed)

BODLEVEL1

(4)

Brown-out Detector

trigger level

1 (unprogrammed)

BODLEVEL0

(4)

Brown-out Detector

trigger level

1 (unprogrammed)

Table 122. Fuse Low Byte

Low Fuse Byte

Bit No

Description

Default Value

CKDIV8

(4)

Divide clock by 8

0 (programmed)

CKOUT

(3)

Clock output

1 (unprogrammed)

SUT1

Select start-up time

1 (unprogrammed)

(1)

SUT0

Select start-up time

0 (programmed)

(1)

CKSEL3

Select Clock source

0 (programmed)

(2)

CKSEL2

Select Clock source

0 (programmed)

(2)

CKSEL1

Select Clock source

1 (unprogrammed)

(2)

CKSEL0

Select Clock source

0 (programmed)

(2)

AT90PWM2 Datasheet(PDF) 290 Page - ATMEL Corporation

AT90PWM2 Datasheet(HTML) 290 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL