attiny167-esxz ATMEL Corporation, attiny167-esxz Datasheet - Page 15

• Manufacturer Part Number: attiny167-esxz
• Description: 8-bit Avr 8-bit Microcontroller Microcontroller With 16k Bytes In-system Programmable Flash And Lin Controller
• Manufacturer: ATMEL Corporation

3.2
7728A–AUTO–07/08
SRAM Data Memory
Figure 3-1.
Figure 3-2
The ATtiny167 is a complex microcontroller with more peripheral units than can be supported
within the 64 locations reserved in the Opcode for the IN and OUT instructions. For the
Extended I/O space in SRAM, only the ST/STS/STD and LD/LDS/LDD instructions can be used.
The data memory locations address both the Register File, the I/O memory, Extended I/O
memory, and the internal data SRAM. The first 32 locations address the Register File, the next
64 location the standard I/O memory, then 160 locations of Extended I/O memory, and the next
locations address the internal data SRAM (see “ISRAM size” in
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 reaches 63 address locations 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 or incremented.
The 32 general purpose working registers, 64 I/O Registers, 160 Extended I/O Registers and the
internal data SRAM in the ATtiny167 are all accessible through all these addressing modes. The
Register File is described in
shows how the ATtiny167 SRAM Memory is organized.
Program Memory Map
”General Purpose Register File” on page
Program Memory
0x0000
Flash end
Table 3-1 on page
9.
ATtiny167
14).
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