ATtiny48 datasheet(185/266 Pages) ATMEL

185 / 266 page

185

8008C–AVR–03/09

ATtiny48/88

Notes:

1. Enables SPM instruction. See “Self-Programming the Flash” on page 177.

Notes:

1. See “Alternate Functions of Port C” on page 67 for description of RSTDISBL Fuse.

2. Programming this fuse bit will change the functionality of the RESET pin and render further

programming via the serial interface impossible. The fuse bit can be unprogrammed using the

parallel programming algorithm (see page 189).

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

4. See “WDTCSR – Watchdog Timer Control Register” on page 44 for details.

5. See Table 8-3 on page 45 for BODLEVEL Fuse decoding.

–4

–

–3

–

–2

–

–1

–

SELFPRGEN (1)

Self Programming Enable

1 (unprogrammed)

Table 20-4.

Fuse High Byte

Bit No

Description

Default Value

RSTDISBL(1) (2)

External Reset Disable

1 (unprogrammed)

DWEN(2)

debugWIRE Enable

1 (unprogrammed)

SPIEN(3)

Enable Serial Program and Data

Downloading

0 (programmed)

(SPI programming enabled)

WDTON(4)

Watchdog Timer Always On

1 (unprogrammed)

EESAVE

EEPROM memory preserved

through chip erase

1 (unprogrammed)

(EEPROM not preserved)

BODLEVEL2(5)

Brown-out Detector trigger level

1 (unprogrammed)

BODLEVEL1(5)

Brown-out Detector trigger level

1 (unprogrammed)

BODLEVEL0(5)

Brown-out Detector trigger level

1 (unprogrammed)

Table 20-3.

Fuse Extended Byte

Bit No

Description

Default Value

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