AT90S8515-8PI Atmel, AT90S8515-8PI Datasheet - Page 84

• Manufacturer Part Number: AT90S8515-8PI
• Description: IC MCU 8K FLSH 8MHZ IT 40DIP
• Manufacturer: Atmel
• Series: AVR® 90Sr

Specifications of AT90S8515-8PI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

Programming the Lock Bits
Reading the Fuse and Lock
Bits
Reading the Signature Bytes
84
AT90S8515
3. Give WR a t
The algorithm for programming the Lock bits is as follows (refer to “Programming the
Flash” on page 81 for details on command and data loading):
1. A: Load Command “0010 0000”.
2. D: Load Data Low Byte. Bit n = “0” programs the Lock bit.
3. E: Write Data Low Byte.
The Lock bits can only be cleared by executing Chip Erase.
The algorithm for reading the Fuse and Lock bits is as follows (refer to “Programming
the Flash” on page 81 for details on Command loading):
1. A: Load Command “0000 0100”.
2. Set OE to “0”, and BS to “1”. The status of the Fuse and Lock bits can now be
3. Set OE to “1”.
Observe that BS needs to be set to “1”.
The algorithm for reading the signature bytes is as follows (refer to “Programming the
Flash” on page 81 for details on command and address loading):
1. A: Load Command “0000 1000”.
2. C: Load Address Low Byte ($00 - $02).
3. Set OE to “1”.
Bit 5 = SPIEN Fuse bit
Bit 0 = FSTRT Fuse bit
Bit 7 - 6, 4 - 1 = “1”. These bits are reserved and should be left unprogrammed (“1”).
Bit 2 = Lock Bit2
Bit 1 = Lock Bit1
Bit 7 - 3, 0 = “1”. These bits are reserved and should be left unprogrammed (“1”).
Bit 7 = Lock Bit1
Bit 6 = Lock Bit2
Bit 5 = SPIEN Fuse bit
Bit 0 = FSTRT Fuse bit
Set OE to “0”, and BS to “0”. The selected signature byte can now be read at DATA.
t
any activity on the RDY/BSY pin.
read at DATA (“0” means programmed).
WLWH_PFB
is found in Table 30. Programming the Fuse bits does not generate
WLWH_PFB
-wide negative pulse to execute the programming,
0841G–09/01