ATTINY861A-XU Atmel, ATTINY861A-XU Datasheet - Page 16
![Microcontrollers (MCU) 8K Flash;125B EEPROM 128B SRAM;16 IO Pins](/photos/39/70/397036/tssop20_sml.jpg)
ATTINY861A-XU
Manufacturer Part Number
ATTINY861A-XU
Description
Microcontrollers (MCU) 8K Flash;125B EEPROM 128B SRAM;16 IO Pins
Manufacturer
Atmel
Datasheet
1.ATTINY861A-XU.pdf
(292 pages)
Specifications of ATTINY861A-XU
Core
RISC
Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
8 KB
Data Ram Size
512 B
Interface Type
SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
16
Operating Supply Voltage
1.8 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
TSSOP-20
Minimum Operating Temperature
- 40 C
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATTINY861A-XUR
Manufacturer:
IDT
Quantity:
1 300
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5.2.1
5.3
16
EEPROM Data Memory
ATtiny261A/461A/861A
Data Memory Access Times
When using register indirect addressing modes with automatic pre-decrement and post-incre-
ment, the address registers X, Y, and Z are decremented or incremented.
The 32 general purpose working registers, 64 I/O Registers, and the 128/256/512 bytes of inter-
nal data SRAM in the ATtiny261A/461A/861A are all accessible through all these addressing
modes. The Register File is described in
Figure 5-2.
This section describes the general access timing concepts for internal memory access. The
internal data SRAM access is performed in two clk
Figure 5-3.
The ATtiny261A/461A/861A contains 128/256/512 bytes of data EEPROM memory. It is orga-
nized as a separate data space, in which single bytes can be read and written. The EEPROM
has an endurance of at least 100,000 write/erase cycles. The access between the EEPROM and
the CPU is described in the following, specifying the EEPROM Address Registers, the EEPROM
Data Register, and the EEPROM Control Register. For a detailed description of Serial data
downloading to the EEPROM, see
Address
clk
Data Memory Map
On-chip Data SRAM Access Cycles
Data
Data
WR
CPU
RD
Compute Address
(128/256/512 x 8)
64 I/O Registers
Data Memory
Internal SRAM
32 Registers
T1
Memory Access Instruction
“Electrical Characteristics” on page
“General Purpose Register File” on page
Address valid
CPU
0x0DF/0x15F/0x25F
0x0000 - 0x001F
0x0020 - 0x005F
0x0060
T2
cycles as illustrated in
Next Instruction
T3
184.
Figure
8197B–AVR–01/10
10.
5-3.
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