Rainbow-electronics AT90LS4433 Manual de usuario descargar pdf (Pagina 96)

AT90S/LS4433

1042G–AVR–09/02

Note: 1. The signature bytes are not readable in lock mode 3, i.e., both Lock bits programmed.

a = address high bits

b = address low bits

H =0– Low Byte, 1 – High Byte

o = data out

i =datain

x = don’tcare

= Lock bit 1

= Lock bit 2

3 = CKSEL0 Fuse

4 = CKSEL1 Fuse

5 = CKSEL2 Fuse

6 =BODENFuse

7 = BODLEVEL Fuse

8 = SPIEN Fuse

Table 35. Serial Programming Instruction Set

Instruction

Instruction Format

OperationByte 1 Byte 2 Byte 3 Byte4

Programming Enable

1010 1100 0101 0011 xxxx xxxx xxxx xxxx Enable Serial Programming while

RESET

is low.

Chip Erase

1010 1100 100x xxxx xxxx xxxx xxxx xxxx Chip Erase Flash and EEPROM

memory arrays.

Read Program Memory

0010 H000 xxxx xaaa bbbb bbbb oooo oooo Read H (highorlow)datao from

program memory at word address

a:b.

Write Program Memory

0100 H000 xxxx xaaa bbbb bbbb iiii iiii Write H (high or low) data i to

program memory at word address

a:b.

Read EEPROM

Memory

1010 0000 xxxx xxxx bbbb bbbb oooo oooo Read data o from EEPROM memory

at address a:b.

Write EEPROM

Memory

1100 0000 xxxx xxxx bbbb bbbb iiii iiii Write data i to EEPROM memory at

address a:b.

Write Lock Bits

1010 1100 1111 1

1 xxxx xxxx xxxx xxxx Write Lock bits. Set bits

1,2

= “0” to

program Lock bits.

Read Lock Bits

0101 1000 xxxx xxxx xxxx xxxx xxxx x

x Read Lock bits. “0” = programmed,

“1” = unprogrammed.

Read Sigature Bytes 0011 0000 xxxx xxxx xxxx xxbb oooo oooo Read signature byte o at address b.

(1)

WriteFuseBits

1010 1100 10176543 xxxx xxxx xxxx xxxx Set bits 7 - 3 = “0” to program, “1” to

unprogram.

Read Fuse Bits

0101 0000 xxxx xxxx xxxx xxxx xx87 6543 Read Fuse bits. “0” = programmed,

“1” = unprogrammed.

1 2 ... 91 92 93 94 95 96 97 98 99 100 101 ... 124 125

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