ATMEga64L ATMEL Corporation, ATMEga64L Datasheet - Page 322

• Manufacturer Part Number: ATMEga64L
• Description: 8-bit AVR Microcontroller with 64K Bytes In-System Programmable Flash
• Manufacturer: ATMEL Corporation

Programming Algorithm
Entering Programming Mode
Leaving Programming Mode
Performing Chip Erase
322
ATmega64(L)
Figure 154. Virtual Flash Page Read Register
All references below of type “1a”, “1b”, and so on, refer to Table 131.
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-
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-
4. Enter JTAG instruction AVR_RESET and shift 0 in the Reset Register.
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
gramming Enable Register.
gramming Enable Register.
t
WLRH_CE
(refer to Table 1 on page 305).
TDO
TDI
D
A
T
A
Machine
State
STROBES
ADDRESS
EEPROM
Lock Bits
Fuses
Flash
2490G–AVR–03/04