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| 型號(hào)： | 71M6532F-IGTR/F |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP100 |
| 封裝： | LEAD FREE, LQFP-100 |
| 文件頁(yè)數(shù)： | 34/120頁(yè) |
| 文件大小： | 2477K |
| 代理商： | 71M6532F-IGTR/F |
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Data Sheet 71M6531D/F-71M6532D/F
FDS 6531/6532 005
20
2005-2010 TERIDIAN Semiconductor Corporation
v1.3
The 80515 writes into external data memory when the MPU executes a MOVX @Ri,A or MOVX
@DPTR,A instruction. The MPU reads external data memory by executing a MOVX A,@Ri or MOVX
A,@DPTR instruction (SFR PDATA provides the upper 8 bytes for the MOVX A,@Ri instruction).
Internal and External Memory Map
Table 7 shows the address, type, use and size of the various memory components.
Only the memory ranges shown in Table 7 contain physical memory.
Table 7: Memory Map
Address
(hex)
Memory
Technology
Memory
Type
Name
Typical Usage
Memory Size
(bytes)
00000-1FFFF/
00000-3FFFF
Flash
Memory
Non-volatile
Program memory
for MPU and CE
MPU Program and
non-volatile data
128 KB/
256 KB
CE program (on 1
KB boundary)
8 KB max.
0000-0FFF
Static RAM
Volatile
External RAM
(XRAM)
Shared by CE and
MPU
4 KB
2000-20BF,
20C8-20FF
Static RAM
Volatile
Configuration RAM,
I/O RAM
Hardware control
256
20C0-20C7
Static RAM
Non-volatile
(battery)
Configuration RAM,
I/O RAM
Battery-buffered
memory
8
0000-00FF
Static RAM
Volatile
Internal RAM
Part of 80515 Core
256
Memory size depends on the IC. See Section1.5.5 Physical Memory for details.
MOVX Addressing
There are two types of instructions differing in whether they provide an 8-bit or 16-bit indirect address to
the external data RAM.
In the first type, MOVX A,@Ri, the contents of R0 or R1 in the current register bank provide the eight
lower-ordered bits of address. The eight high-ordered bits of the address are specified with the PDATA
SFR. This method allows the user paged access (256 pages of 256 bytes each) to all ranges of the
external data RAM.
In the second type of MOVX instruction, MOVX A,@DPTR, the data pointer generates a 16-bit address.
This form is faster and more efficient when accessing very large data arrays (up to 64 KB), since no
additional instructions are needed to set up the eight high ordered bits of the address.
It is possible to mix the two MOVX types. This provides the user with four separate data pointers, two
with direct access and two with paged access, to the entire 64 KB of external memory range.
Dual Data Pointer
The Dual Data Pointer accelerates the block moves of data. The standard DPTR is a 16-bit register that
is used to address external memory or peripherals. In the 80515 core, the standard data pointer is called
DPTR, the second data pointer is called DPTR1. The data pointer select bit, located in the LSB of the DPS
register (DPS[0]), chooses the active pointer. DPTR is selected when DPS[0] = 0 and DPTR1 is selected
when DPS[0] = 1.
The user switches between pointers by toggling the LSB of the DPS register. The values in the data pointers
are not affected by the LSB of the DPS register. All DPTR related instructions use the currently selected
DPTR for any activity.
The second data pointer may not be supported by certain compilers.
DPTR1 is useful for copy routines, where it can make the inner loop of the routine two instructions faster
compared to the reloading of DPTR from registers. Any interrupt routine using DPTR1 must save
and restore DPS, DPTR and DPTR1, which increases stack usage and slows down interrupt latency.
By selecting the Evatronics R80515 core in the Keil compiler project settings and by using the
compiler directive “MODC2”, dual data pointers are enabled in certain library routines.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| 71M6533 | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:Energy Meter IC |
| 71M6533-DB | 功能描述:開發(fā)板和工具包 - 8051 71M6533 Demo Brd RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評(píng)估:C8051F960, Si7005 核心: 接口類型:USB 工作電源電壓: |
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| 71M6533H | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:Energy Meter IC |
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