ATTINY26L-8SU Atmel, ATTINY26L-8SU Datasheet - Page 11

• 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

Stack Pointer – SP
Program and Data
Addressing Modes
Register Direct, Single
Register Rd
Register Direct, Two
Registers Rd and Rr
1477K–AVR–08/10
The ATtiny26(L) Stack Pointer is implemented as an 8-bit register in the I/O space location $3D
($5D). As the ATtiny26(L) data memory has 224 ($E0) locations, eight bits are used.
The Stack Pointer points to the data SRAM stack area where the Subroutine and Interrupt
Stacks are located. This Stack space in the data SRAM must be defined by the program before
any subroutine calls are executed or interrupts are enabled. The Stack Pointer must be set to
point above $60. The Stack Pointer is decremented by one when data is pushed onto the Stack
with the PUSH instruction, and it is decremented by two when an address is pushed onto the
Stack with subroutine calls and interrupts. The Stack Pointer is incremented by one when data is
popped from the Stack with the POP instruction, and it is incremented by two when an address
is popped from the Stack with return from subroutine RET or return from interrupt RETI.
The ATtiny26(L) AVR Enhanced RISC microcontroller supports powerful and efficient address-
ing modes for access to the Flash program memory, SRAM, Register File, and I/O Data
memory. This section describes the different addressing modes supported by the AVR architec-
ture. In the figures, OP means the operation code part of the instruction word. To simplify, not all
figures show the exact location of the addressing bits.
Figure 5. Direct Single Register Addressing
The operand is contained in register d (Rd).
Figure 6. Direct Register Addressing, Two Registers
Bit
$3D ($5D)
Read/Write
Initial Value
R/W
SP7
7
0
SP6
R/W
6
0
SP5
R/W
5
0
R/W
SP4
4
0
R/W
SP3
3
0
SP2
R/W
2
0
SP1
R/W
1
0
SP0
R/W
0
0
SP
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