ATTINY13A-SU Atmel, ATTINY13A-SU Datasheet - Page 100

• Manufacturer Part Number: ATTINY13A-SU
• Description: IC MCU AVR 1K FLASH 20MHZ 8SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY13A-SU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 6
• Program Memory Size: 1KB (512 x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 64 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
• Cpu Family: ATtiny
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: SPI
• Total Internal Ram Size: 64Byte
• # I/os (max): 6
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 2.5/3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 1.8V
• On-chip Adc: 4-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: SOIC EIAJ
• Processor Series: ATTINY1x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 64 B
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 6
• Number Of Timers: 1
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAKSTK511
• Minimum Operating Temperature: - 40 C
• Package: 8SOIC EIAJ
• Family Name: ATtiny
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 2.5|3.3|5 V
• For Use With: ATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Connectivity: -
• Lead Free Status / Rohs Status: Compliant

16.5
16.6
16.6.1
16.6.2
100
EEPROM Write Prevents Writing to SPMCSR
Reading Fuse and Lock Bits from Firmware
ATtiny13A
Reading Lock Bits from Firmware
Reading Fuse Bits from Firmware
The LPM instruction uses the Z-pointer to store the address. Since this instruction addresses the
Flash byte-by-byte, also the LSB (bit Z0) of the Z-pointer is used.
Note that an EEPROM write operation will block all software programming to Flash. Reading the
fuses and lock bits from software will also be prevented during the EEPROM write operation. It is
recommended that the user checks the status bit (EEPE) in the EECR Register and verifies that
the bit is cleared before writing to the SPMCSR Register.
It is possible to read fuse and lock bits from software.
Issuing an LPM instruction within three CPU cycles after RFLB and SELFPRGEN bits have
been set in SPMCSR will return lock bit values in the destination register. The RFLB and SELF-
PRGEN bits automatically clear upon completion of reading the lock bits, or if no LPM instruction
is executed within three CPU cycles, or if no SPM instruction is executed within four CPU cycles.
When RFLB and SELFPRGEN are cleared, LPM functions normally.
To read the lock bits, follow the below procedure.
If successful, the contents of the destination register are as follows.
See section
bits.
The algorithm for reading fuse bytes is similar to the one described above for reading lock bits,
only the addresses are different.
To read the Fuse Low Byte (FLB), follow the below procedure:
If successful, the contents of the destination register are as follows.
Bit
Rd
Bit
Rd
1. Load the Z-pointer with 0x0001.
2. Set RFLB and SELFPRGEN bits in SPMCSR.
3. Issuing an LPM instruction within three clock cycles will return lock bits in the destina-
1. Load the Z-pointer with 0x0000.
2. Set RFLB and SELFPRGEN bits in SPMCSR.
3. Issuing an LPM instruction within three clock cycles will FLB in the destination register.
tion register.
“Program And Data Memory Lock Bits” on page 103
FLB7
7
–
7
FLB6
6
–
6
FLB5
5
5
–
FLB4
4
–
4
FLB3
3
–
3
FLB2
2
–
2
for more information on lock
FLB1
LB2
1
1
FLB0
LB1
0
0
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