AT89LP51 datasheet(84/113 Pages) ATMEL

84 / 113 page

3709B–MICRO–12/10

AT89LP51/52 - Preliminary

Notes:1. Program Enable must be the first command issued after entering into programming mode.

2. 0110 1001B is returned on MISO when Program Enable was successful.

3. Parallel Enable switches the interface from serial to parallel format until RST goes inactive.

4. Each byte address selects one fuse or lock bit. Data bytes must be 00h or FFh.

5. See Table 17-5 on page 86 for Fuse definitions.

6. See Table 17-4 on page 86 for Lock Bit definitions.

Table 17-2.

Programming Command Summary

Command

Opcode

Addr High

Addr Low

Data 0

Data 1–63

Program Enable(1)

1010 1100

0101 0011

xxxx xxxx

(0110 1001)

(2)

–

Parallel Enable(3)

1010 1100

0011 0101

xxxx xxxx

–

Chip Erase

1010 1100

100x xxxx

xxxx xxxx

–

Read Status

0110 0000

xxxx xxxx

Status Out–

Write Code Byte

0100 0000

000a aaaa

asbb bbbb

Data In

–

Read Code Byte

0010 0000

000a aaaa

asbb bbbb

Data Out–

Write Code Page

0101 0000

000a aaaa

as00 0000

Byte 0

Bytes 1–63

Write Code Page with Auto-Erase

0111 0000

000a aaaa

as00 0000

Byte 0

Bytes 1–63

Read Code Page

0011 0000

000a aaaa

as00 0000

Byte 0

Bytes 1–63

Write Data Byte

1100 0000

xxxx xxxx

asbb bbbb

Data In

–

Read Data Byte

1010 0000

xxxx xxxx

asbb bbbb

Data Out–

Write Data Page

1101 0000

xxxx xxxx

as00 0000

Byte 0

Bytes 1–63

Write Data Page with Auto-Erase

1101 0010

xxxx xxxx

as00 0000

Byte 0

Bytes 1–63

Read Data Page

1011 0000

xxxx xxxx

as00 0000

Byte 0

Bytes 1–63

Write User Fuse(5)

0100 0001

xxxx xxxx

00bb bbbb

Fuse In(4)

–

Read User Fuse(5)

0010 0001

xxxx xxxx

00bb bbbb

Fuse Out(4)

–

Write User Fuses

(5)

0101 0001

xxxx xxxx

0000 0000

Fuse 0

(4)

Bytes 1–63

Write User Fuses with Auto-Erase(5)

0111 0001

xxxx xxxx

0000 0000

Fuse 0(4)

Fuses 1–63(4)

Read User Fuses(5)

0011 0001

xxxx xxxx

0000 0000

Fuse 0(4)

Fuses 1–63(4)

Write Lock Mode

(6)

1010 1100

1110 00BB

xxxx xxxx

–

Read Lock Mode(6)

0010 0100

xxxx xxxx

xxxL LLxx

–

Write Lock Bit(6)

0100 0100

xxxx xxxx

00bb bbbb

Data In(4)

–

Write Lock Bits

(6)

0101 0100

xxxx xxxx

0000 0000

Byte 0

(4)

Bytes 1–63

(4)

Read Lock Bits(6)

0011 0100

xxxx xxxx

0000 0000

Byte 0(4)

Bytes 1–63(4)

Write User Signature Byte

0100 0010

xxxx xxxx

asbb bbbb

Data In

–

Read User Signature Byte

0010 0010

xxxx xxxx

asbb bbbb

Data Out–

Write User Signature Page

0101 0010

xxxx xxxx

as00 0000

Byte 0

Byte 1–63

Write User Signature Page with Auto-Erase

0111 0010

xxxx xxxx

as00 0000

Byte 0

Byte 1–63

Read User Signature Page

0011 0010

xxxx xxxx

as00 0000

Byte 0

Byte 1–63

Read Atmel Signature Byte(7)

0010 1000

xxxx xxxx

0sbb bbbb

Data Out–

Read Atmel Signature Page(7)

0011 1000

xxxx xxxx

0s00 0000

Byte 0

Byte 1–63

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