ATTINY26L-8SU Atmel, ATTINY26L-8SU Datasheet - Page 18

• Manufacturer Part Number: ATTINY26L-8SU
• Description: ID MCU AVR 2K 5V 8MHZ 20-SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY26L-8SU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• 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): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (7.5mm Width)
• Package: 20SOIC
• Device Core: AVR
• Family Name: ATtiny
• Maximum Speed: 8 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 16
• Interface Type: SPI/USI
• On-chip Adc: 11-chx10-bit
• Number Of Timers: 2
• Cpu Family: ATtiny
• Device Core Size: 8b
• Frequency (max): 8MHz
• Total Internal Ram Size: 128Byte
• # I/os (max): 16
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 20
• Package Type: SOIC
• Processor Series: ATTINY2x
• Core: AVR8
• Data Ram Size: 128 B
• Maximum Clock Frequency: 8 MHz
• 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
• Minimum Operating Temperature: - 40 C
• 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 SPIATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK505 - ADAPTER KIT FOR 14PIN AVR MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ATTINY26L-8SJ; ATTINY26L-8SJ

EEPROM Data
Memory
EEPROM Read/Write
Access
EEPROM Address
Register – EEAR
18
ATtiny26(L)
The five different addressing modes for the data memory cover: Direct, Indirect with Displace-
ment, Indirect, Indirect with Pre-decrement, and Indirect with Post-increment. In the Register
File, registers R26 to R31 feature the indirect addressing pointer registers.
The direct addressing reaches the entire data space. The Indirect with Displacement mode fea-
tures a 63 address locations reach from the base address given by the Y- or Z-register.
When using register indirect addressing modes with automatic pre-decrement and post-incre-
ment, the address registers X, Y, and Z are decremented and incremented.
The 32 general purpose working registers, 64 I/O Registers and the 128 bytes of internal data
SRAM in the ATtiny26(L) are all accessible through all these addressing modes.
See “Program and Data Addressing Modes” on page 11 for a detailed description of the different
addressing modes.
The ATtiny26(L) contains 128 bytes of data EEPROM memory. It is organized as a separate
data space, in which single bytes can be read and written (see “Memory Programming” on page
107). The EEPROM has an endurance of at least 100,000 write/erase cycles per location.
The EEPROM Access Registers are accessible in the I/O space.
The write access time is typically 8.3 ms. A self-timing function lets the user software detect
when the next byte can be written. A special EEPROM Ready Interrupt can be set to trigger
when the EEPROM is ready to accept new data.
An ongoing EEPROM write operation will complete even if a reset condition occurs.
In order to prevent unintentional EEPROM writes, a two state write procedure must be followed.
Refer to the description of the EEPROM Control Register for details on this.
When the EEPROM is written, the CPU is halted for two clock cycles before the next instruction
is executed.
When the EEPROM is read, the CPU is halted for four clock cycles before the next instruction is
executed.
• Bit 7 – RES: Reserved Bits
This bit are reserved bit in the ATtiny26(L) and will always read as zero.
• Bit 6..0 – EEAR6..0: EEPROM Address
The EEPROM Address Register – EEAR – specifies the EEPROM address in the 128 bytes
EEPROM space. The EEPROM data bytes are addressed linearly between 0 and 127. The ini-
tial value of EEAR is undefined. A proper value must be written before the EEPROM may be
accessed.
Bit
$1E ($3E)
Read/Write
Initial Value
R
7
–
0
EEAR6
R/W
X
6
EEAR5
R/W
X
5
EEAR4
R/W
X
4
EEAR3
R/W
X
3
EEAR2
R/W
X
2
EEAR1
R/W
X
1
EEAR0
R/W
X
0
EEAR
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