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参数资料
| 型号： | ADE7518ASTZF8-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 73/128页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER MCU 8K 64LQFP |
| 产品变化通告： | Product Discontinuance 27/Oct/2011 |
| 标准包装： | 1,500 |
| 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： | 带卷 (TR) |
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ADE7518
DUAL DATA POINTERS
The ADE7518 incorporates two data pointers. The second data
pointer is a shadow data pointer and is selected via the Data Pointer
Control SFR (DPCON, 0xA7). DPCON features automatic hard-
To illustrate the operation of DPCON, the following code copies
256 bytes of code memory at Address 0xD000 into XRAM,
starting from Address 0x0000:
ware postincrement and postdecrement, as well as an automatic
data pointer toggle.
MOV DPTR,#0
MOV DPCON,#55H
;Main DPTR = 0
;Select shadow DPTR
Note that this is the only section of the data sheet where the
main and shadow data pointers are distinguished. Whenever the
data pointer (DPTR) is mentioned elsewhere in the data sheet,
active DPTR is implied.
;DPTR1 increment mode
;DPTR0 increment mode
;DPTR auto toggling ON
In addition, only the MOVC/MOVX @DPTR instructions
automatically postincrement and postdecrement the DPTR.
Other MOVC/MOVX instructions, such as MOVC PC
MOV DPTR,#0D000H
MOVELOOP: CLR A
MOVC A,@A+DPTR
;DPTR = D000H
;Get data
or MOVC @Ri, do not cause the DPTR to automatically
postincrement and postdecrement.
;Post Inc DPTR
;Swap to Main DPTR(Data)
Table 56. Data Pointer Control SFR (DPCON, 0xA7)
MOVX @DPTR,A
;Increment main DPTR
;Swap Shadow DPTR(Code)
MOV A, DPL
JNZ MOVELOOP
;Put ACC in XRAM
Bit
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 autoswapping of the DPTR.
Set in user software to enable automatic toggling of the DPTR after each MOVX or MOVC instruction.
5 to 4
DP1m1,
DP1m0
00
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 postincremented after a MOVX or MOVC instruction.
1 0 DPTR is postdecremented 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.
3to 2
DP0m1,
DP0m0
00
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 postincremented after a MOVX or MOVC instruction.
1 0 DPTR is postdecremented 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
Not Implemented. Write don’t care.
0
DPSEL
0
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 SFR and DPH SFR.
Rev. 0 | Page 73 of 128
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