Rainbow-electronics ATmega128L Manuel d'utilisateur télécharger pdf (Page 295)

295

ATmega128(L)

2467B–09/01

least t

WD_EEPROM

before programming the next byte. See Table 129 for t

WD_EEPROM

value.

Figure 144. .Serial Programming Waveforms

Table 129. Minimum Wait Delay before Writing the Next Flash or EEPROM Location

Symbol Minimum Wait Delay

WD_FLASH

4.5 ms

WD_EEPROM

9.0 ms

WD_ERASE

9.0 ms

MSB

LSB

SERIAL CLOCK INPUT

(SCK)

SERIAL DATA INPUT

(MOSI)

(MISO)

SAMPLE

SERIAL DATA OUTPUT

Table 130. 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 after RESET goes

low.

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

Read Program

Memory

0010 H000 aaaa aaaa bbbb bbbb oooo oooo Read H (high or low) data o from Program

memory at word address a:b.

Load Program

Memory Page

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

Memory page at word address b. Data low

byte must be loaded before data high byte is

applied within the same address.

Write Program

Memory Page

0100 1100 aaaa aaaa bxxx xxxx xxxx xxxx

Write Program Memory Page at address a:b.

Read EEPROM

Memory

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

address a:b.

Write EEPROM

Memory

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

a:b.

Read Lock Bits 0101 1000 0000 0000 xxxx xxxx xxoo oooo Read Lock bits. “0” = programmed, “1” =

unprogrammed. See

Table 116 on page

279

for details.

Write Lock Bits 1010 1100 111x xxxx xxxx xxxx 11ii iiii Write Lock bits. Set bits = “0” to program Lock

bits. See

Table 116 on page 279 for details.

Read Signature Byte 0011 0000 xxxx xxxx xxxx xxbb oooo oooo Read Signature Byte o at address b.

1 2 ... 290 291 292 293 294 295 296 297 298 299 300 ... 330 331

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