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| 型号： | EVAL-ADE5169EBZ-2 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 86/156页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD5169 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电度表/功率表 |
| 嵌入式： | 是 |
| 已用 IC / 零件： | ADE5169 |
| 主要属性： | 用于汇编语言和 C 代码的 IAR 工具 |
| 次要属性： | 隔离和非隔离输出选项 |
| 已供物品： | 板，软件 |
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ADE5166/ADE5169/ADE5566/ADE5569
Code Memory
Code and data memory is stored in the 62 kB flash memory
space. No external code memory is supported. To access code
memory, code indirect addressing is used.
ADDRESSING MODES
The 8052 core provides several addressing modes. The address-
ing mode determines how the core interprets the memory location
or data value specified in assembly language code. There are six
addressing modes, as shown in Table 67.
Table 67. 8052 Addressing Modes
Core Clock
Addressing Mode Example Bytes Cycles
Immediate MOV A, #A8h 2 2
MOV DPTR, #A8h 3 3
Direct MOV A, A8h 2 2
MOV A, IE 2 2
MOV A, R0 1 1
Indirect MOV A, @R0 1 2
Data Sheet
Indirect addressing allows addresses to be computed and is
useful for indexing into data arrays stored in RAM.
Note that an instruction that refers to Address 0x00 through
Address 0x7F is referring to internal RAM, and indirect or direct
addressing modes can be used. An instruction with indirect
addressing that uses an address between 0x80 and 0xFF is
referring to internal RAM, not to an SFR.
Extended Direct Addressing
The DPTR register is used to access extended internal RAM in
extended indirect addressing mode. The ADE5166/ADE5169/
ADE5566/ADE5569 provide 2 kB of extended internal RAM
(XRAM), accessed through MOVX instructions. External
memory spaces are not supported on the ADE5166/ADE5169/
ADE5566/ADE5569.
In extended direct addressing mode, the DPTR register points
to the address of the byte of extended RAM. The following code
moves the contents of extended RAM Address 0x100 to the
accumulator:
Extended Direct
Extended Indirect
MOVX A, @DPTR
MOVX A, @R0
1
1
4
4
MOV
MOVX
DPTR,#100h
A,@DPTR
Code Indirect MOVC A, @A+DPTR 1 4
MOVC A, @A+PC 1 4
JMP @A+DPTR 1 3
Immediate Addressing
In immediate addressing, the expression entered after the number
sign (#) is evaluated by the assembler and stored in the memory
address specified. This number is referred to as a literal because
it refers only to a value and not to a memory location. Instructions
using this addressing mode are slower than those between two
registers because the literal must be stored and fetched from
memory. The expression can be entered as a symbolic variable or
an arithmetic expression; the value is computed by the assembler.
Direct Addressing
With direct addressing, the value at the source address is moved
to the destination address. Direct addressing provides the fastest
execution time of all the addressing modes when an instruction
is performed between registers using direct addressing. Note that
indirect or direct addressing modes can be used to access general-
purpose RAM Address 0x00 through Address 0x7F. An instruction
with direct addressing that uses an address between 0x80 and
0xFF is referring to a special function memory location.
Indirect Addressing
With indirect addressing, the value pointed to by the register is
moved to the destination address. For example, to move the
contents of internal RAM Address 0x82 to the accumulator, use
the following two instructions, which require a total of four
clock cycles and three bytes of storage in the program memory:
MOV R0,#82h
These two instructions require a total of seven clock cycles and
four bytes of storage in the program memory.
Extended Indirect Addressing
The extended internal RAM is accessed through a pointer to the
address in indirect addressing mode. The ADE5166/ADE5169/
ADE5566/ADE5569 provide 2 kB of extended internal RAM,
accessed through MOVX instructions. External memory is not
supported on the ADE5166/ADE5169/ADE5566/ADE5569.
In extended indirect addressing mode, a register holds the
address of the byte of extended RAM. The following code
moves the contents of extended RAM Address 0x80 to the
accumulator:
MOV R0, #80h
MOVX A, @R0
These two instructions require six clock cycles and three bytes
of storage.
Note that there are 2 kB of extended RAM, so both extended
direct and extended indirect addressing can cover the whole
address range. There is a storage and speed advantage to using
extended indirect addressing because the additional byte of
addressing available through the DPTR register that is not
needed is not stored.
From the three examples demonstrating the access of internal
RAM from 0x80 through 0xFF and extended internal RAM
from 0x00 through 0xFF, it can be seen that it is most efficient
to use the entire internal RAM accessible through indirect
access before moving to extended RAM.
MOV
A,@R0
Rev. D | Page 86 of 156
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相关代理商/技术参数 |
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| EVAL-ADE5169F62EBZ | 制造商:Analog Devices 功能描述:EVALUATION BOARD FOR ADE5169 - Boxed Product (Development Kits) 制造商:Rochester Electronics LLC 功能描述: |
| EVAL-ADE5569F62EBZ | 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver |
| EVAL-ADE7169EBZ-2 | 功能描述:BOARD EVALUATION FOR ADE7169F16 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
| EVAL-ADE7169F16EB | 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Energy Measurement IC with 8052 MCU, RTC and LCD driver |
| EVAL-ADE7169F16EBZ | 制造商:Analog Devices 功能描述:Evaluation Board For ADE7169 制造商:Analog Devices 功能描述:EVAL BD FOR ADE7169 - Bulk |
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