AT90S2313-10SI Atmel, AT90S2313-10SI Datasheet - Page 66

• Manufacturer Part Number: AT90S2313-10SI
• Description: MCU 2K FLASH 10MHZ 20-SOIC
• Manufacturer: Atmel
• Series: AVR® 90Sr

Specifications of AT90S2313-10SI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

Reading the Fuse and Lock
Bits
Reading the Signature Bytes
66
AT90S2313
The algorithm for reading the Fuse and Lock bits is as follows (refer to “Programming
the Flash” on page 63 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 63 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”.
read at DATA (“0” means programmed).
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.
0839I–AVR–06/02