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参数资料
| 型号： | ADE7569ASTZF16 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 128/136页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER MCU 16K 64LQFP |
| 标准包装： | 1 |
| 输入阻抗： | * |
| 测量误差： | * |
| 电压 - 高输入/输出： | * |
| 电压 - 低输入/输出： | * |
| 电流 - 电源： | * |
| 电源电压： | * |
| 测量仪表类型： | * |
| 工作温度： | * |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-LQFP（10x10） |
| 包装： | 托盘 |
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ADE7566/ADE7569
DUAL DATA POINTERS
Preliminary Technical Data
Each ADE7566/ADE7569 incorporates two data pointers. The
second data pointer is a shadow data pointer and is selected via
MOV DPTR,#0
MOV DPCON,#55H
;Main DPTR = 0
;Select shadow DPTR
the Data Pointer Control SFR SFR (DPCON, 0xA7). DPCON
features automatic hardware post-increment and post-
decrement, as well as an automatic data pointer toggle.
Note that this section of the data sheet is the only place where
the main and shadow data pointers are distinguished. Whenever
the data pointer (DPTR) is mentioned elsewhere in the data
;DPTR1 increment mode
;DPTR0 increment mode
;DPTR auto toggling ON
MOV DPTR,#0D000H ;DPTR = D000H
MOVELOOP: CLR A
sheet, active DPTR is implied.
MOVC A,@A+DPTR
;Get data
In addition, only the MOVC/MOVX @DPTR instructions
automatically post-increment and post-decrement the DPTR.
;Post Inc DPTR
;Swap to Main DPTR(Data)
Other MOVC/MOVX instructions, such as MOVC PC or
MOVC @Ri, do not cause the DPTR to automatically post-
increment and post-decrement.
XRAM
MOVX @DPTR,A
;Increment main DPTR
;Put ACC in
To illustrate the operation of DPCON, the following code copies
256 bytes of code memory at Address 0xD000 into XRAM,
starting from Address 0x0000:
;Swap Shadow DPTR(Code)
MOV A, DPL
JNZ MOVELOOP
Table 144. Data Pointer Control SFR SFR (DPCON, 0xA7)
Bit No.
7
6
Mnemonic
–
DPT
Default
0
0
Description
Not Implemented, Write Don’t Care.
Data Pointer Automatic Toggle Enable. Cleared by the user to disable auto swapping of the DPTR.
Set in user software to enable automatic toggling of the DPTR after each MOVX or MOVC instruction.
5, 4
DP1m1,
DP1m0
0
Shadow Data Pointer Mode. These bits enable extra modes of the shadow data pointer operation,
allowing more compact and more efficient code size and execution.
DP1m1 DP1m0 Result (Behavior of the Shadow Data Pointer)
0 0 8052 behavior.
0 1 DPTR is post-incremented after a MOVX or a MOVC instruction.
1 0 DPTR is post-decremented after a MOVX or MOVC instruction.
1 1
DPTR LSB is toggled after a MOVX or MOVC instruction. This instruction can be
useful for moving 8-bit blocks to/from 16-bit devices.
3, 2
DP0m1,
DP0m0
0
Main Data Pointer Mode. These bits enable extra modes of the main data pointer operation, allowing
more compact and more efficient code size and execution.
DP0m1 DP0m0 Result (Behavior of the Main Data Pointer)
0 0 8052 behavior.
0 1 DPTR is post-incremented after a MOVX or a MOVC instruction.
1 0 DPTR is post-decremented after a MOVX or MOVC instruction.
1 1
DPTR LSB is toggled after a MOVX or MOVC instruction. This instruction is useful
for moving 8-bit blocks to/from 16-bit devices.
1
0
–
DPSEL
0
0
Not Implemented, Write Don’t Care.
Data Pointer Select. Cleared by the user to select the main data pointer, meaning that the contents of
this 16-bit register are placed into the DPL SFR and DPH SFR. Set by the user to select the shadow data
pointer, meaning that the contents of a separate 16-bit register appear in the DPL SRF and DPH SFR.
Rev. PrA | Page 128 of 136
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相关代理商/技术参数 |
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| ADE7569ASTZF162 | 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 |
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