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参数资料
| 型号： | R1130H231B-T1 |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | 2.3 V FIXED POSITIVE LDO REGULATOR, 0.49 V DROPOUT, PDSO6 |
| 封装： | SOT-89, 5 PIN |
| 文件页数： | 13/24页 |
| 文件大小： | 739K |
| 代理商： | R1130H231B-T1 |
20
4317K–AVR–03/2013
AT90PWM2/3/2B/3B
The AT90PWM2/2B/3/3B 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 from 0x60 - 0xFF in SRAM, only the ST/STS/STD and LD/LDS/LDD
instructions can be used.
The lower 768 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 512 locations address the internal data SRAM.
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 512 bytes of internal data SRAM in the AT90PWM2/2B/3/3B are all accessible through all
these addressing modes. The Register File is described in “General Purpose Register File” on
Figure 6-2.
Data Memory Map
6.2.1
SRAM Data Access Times
This section describes the general access timing concepts for internal memory access. The
internal data SRAM access is performed in two clk
CPU cycles as described in Figure 6-3.
32 Registers
64 I/O Registers
Internal SRAM
(512 x 8)
0x0000 - 0x001F
0x0020 - 0x005F
0x02FF
0x0060 - 0x00FF
Data Memory
160 Ext I/O Reg.
0x0100
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