AT90SCR100 datasheet(384/433 Pages) ATMEL

384 / 433 page

384

TPR0327AY–SMS–30Jan09

AT90SCR100

Notes: 1. Not all instructions are applicable for all parts.

2. a = address

If the LSB in RDY/BSY data byte out is ‘1’, a programming operation is still pending. Wait until

this bit returns ‘0’ before the next instruction is carried out.

Within the same page, the low data byte must be loaded prior to the high data byte.

After data is loaded to the page buffer, program the EEPROM page, see Figure 29-2 on page

385.

Read Program Memory, Low byte

$20

adr MSB

adr LSB

low data byte out

Read EEPROM Memory

$A0

0000 00aa(2)

aaaa aaaa(2)

data byte out

Read Lock bits

$58

$00

data byte out

Read Signature Byte

$30

$00

0000 aaaa(2)

data byte out

Read Fuse bits

$50

$00

data byte out

Read Fuse High bits

$58

$08

$00

data byte out

Read Extended Fuse Bits

$50

$08

$00

data byte out

Read Calibration Byte

$38

$00

data byte out

Write Instructions

Write Program Memory Page

$4C

adr MSB

adr LSB

$00

Write EEPROM Memory

$C0

0000 00aa(2)

aaaa aaaa(2)

data byte in

Write EEPROM Memory Page (page access)

$C2

0000 00aa(2)

aaaa aa00(2)

$00

Write Lock bits

$AC

$E0

$00

data byte in

Write Fuse bits

$AC

$A0

$00

data byte in

Write Fuse High bits

$AC

$A8

$00

data byte in

Write Extended Fuse Bits

$AC

$A4

$00

data byte in

Table 29-11.

Serial Programming Instruction Set (Hexadecimal values)

Instruction/Operation

Instruction Format

Byte 1

Byte 2

Byte 3

Byte4

1. Bits are programmed ‘0’, unprogrammed ‘1’.

2. To ensure future compatibility, unused Fuses and Lock bits should be

unprogrammed (‘1’) .

3. Refer to the correspondig section for Fuse and Lock bits, Calibration and

Signature bytes and Page size.

4. See htt://www.atmel.com/avr for Application Notes regarding program-

ming and programmers.

Note

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