ATMEGA64L-8MI View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA64L-8MI

8-bit AVR® Microcontroller with 64K Bytes In-System Programmable Flash

Atmel Corporation 

Figure 154. Virtual Flash Page Read Register

State

Machine

STROBES

ADDRESS

TDI

D

A

T

A

Flash

EEPROM

Fuses

Lock Bits

TDO

Programming Algorithm

All references below of type “1a”, “1b”, and so on, refer to Table 131.

Entering Programming Mode

1. Enter JTAG instruction AVR_RESET and shift 1 in the Reset Register.

2. Enter instruction PROG_ENABLE and shift 1010_0011_0111_0000 in the Pro-

gramming Enable Register.

Leaving Programming Mode

1. Enter JTAG instruction PROG_COMMANDS.

2. Disable all programming instructions by using no operation instruction 11a.

3. Enter instruction PROG_ENABLE and shift 0000_0000_0000_0000 in the Pro-

gramming Enable Register.

4. Enter JTAG instruction AVR_RESET and shift 0 in the Reset Register.

Performing Chip Erase

1. Enter JTAG instruction PROG_COMMANDS.

2. Start chip erase using programming instruction 1a.

3. Poll for chip erase complete using programming instruction 1b, or wait for

tWLRH_CE (refer to Table 1 on page 305).

322 ATmega64(L)

2490G–AVR–03/04

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