Datasheet

ATmega32A
 2018 Microchip Technology Inc. Data Sheet Complete DS40002072A-page 265
6. Set OE to “1”.
27.7.7 Reading the EEPROM
The algorithm for reading the EEPROM memory is as follows (refer to “Programming the Flash” on page 262 for
details on Command and Address loading):
1. A: Load Command “0000 0011”.
2. G: Load Address High Byte ($00 - $FF)
3. B: Load Address Low Byte ($00 - $FF)
4. Set OE
to “0”, and BS1 to “0”. The EEPROM Data byte can now be read at DATA.
5. Set OE
to “1”.
27.7.8 Programming the Fuse Low Bits
The algorithm for programming the Fuse Low bits is as follows (refer to “Programming the Flash” on page 262 for
details on Command and Data loading):
1. A: Load Command “0100 0000”.
2. C: Load Data Low Byte. Bit n = “0” programs and bit n = “1” erases the Fuse bit.
3. Set BS1 to “0” and BS2 to “0”.
4. Give WR
a negative pulse and wait for RDY/BSY to go high.
27.7.9 Programming the Fuse High Bits
The algorithm for programming the Fuse high bits is as follows (refer to “Programming the Flash” on page 262 for
details on Command and Data loading):
1. A: Load Command “0100 0000”.
2. C: Load Data Low Byte. Bit n = “0” programs and bit n = “1” erases the Fuse bit.
3. Set BS1 to “1” and BS2 to “0”. This selects high data byte.
4. Give WR
a negative pulse and wait for RDY/BSY to go high.
5. Set BS1 to “0”. This selects low data byte.