Rainbow-electronics ATtiny26L Manual de usuario descargar pdf (Pagina 106)

106

ATtiny26(L)

1477B–AVR–04/02

Memory

Programming

Program and Data

Memory Lock Bits

The ATtiny26 provides two Lock bits which can be left unprogrammed (“1”) or can be

programmed (“0”) to obtain the additional features listed in Table 48. The Lock bits can

only be erased to “1” with the Chip Erase command.

Note: 1. “1” means unprogrammed, “0” means programmed

Notes: 1. Program the Fuse bits before programming the Lock bits.

2. “1” means unprogrammed, “0” means programmed

Table 47. Lock Bit Byte

(1)

Lock Bit Byte Bit No Description Default Value

7 – 1 (unprogrammed)

6 – 1 (unprogrammed)

5 – 1 (unprogrammed)

4 – 1 (unprogrammed)

3 – 1 (unprogrammed)

2 – 1 (unprogrammed)

LB2 1 Lock bit 1 (unprogrammed)

LB1 0 Lock bit 1 (unprogrammed)

Table 48. Lock Bit Protection Modes

Memory Lock Bits

Protection TypeLB Mode LB2

(2)

LB1

(2)

1 1 1 No memory lock features enabled.

210

Further programming of the Flash and EEPROM is

disabled in parallel and serial programming mode. The

Fuse bits are locked in both serial and parallel

programming mode.

(1)

300

Further programming and verification of the Flash and

EEPROM is disabled in parallel and serial programming

mode. The Fuse bits are locked in both serial and parallel

programming mode.

(1)

1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 150 151

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