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參數資料
| 型號： | W77E516F-25 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | QFP-44 |
| 文件頁數： | 9/85頁 |
| 文件大小： | 596K |
| 代理商： | W77E516F-25 |
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Preliminary W77E516
Publication Release Date: August 16, 2002
- 9 -
Revision A1
Data Memory
The W77E516 can access up to 64Kbytes of external Data Memory. This memory region is accessed
by the MOVX instructions. Unlike the 8051 derivatives, the W77E516 contains on-chip 1K bytes MOVX
SRAM of Data Memory, which can only be accessed by MOVX instructions.
These 1K bytes of SRAM are between address 0000H and 03FFH. Access to the on-chip MOVX
SRAM is optional under software control. When enabled by software, any MOVX instruction that uses
this area will go to the on-chip RAM. MOVX addresses greater than 03FFH automatically go to external
memory through Port 0 and 2. When disabled, the 1KB memory area is transparent to the system
memory map. Any MOVX directed to the space between 0000H and FFFFH goes to the expanded bus
on Port 0 and 2. This is the default condition. In addition, the W77E516 has the standard 256 bytes of
on-chip Scratchpad RAM. This can be accessed either by direct addressing or by indirect addressing.
There are also some Special Function Registers (SFRs), which can only be accessed by direct
addressing. Since the Scratchpad RAM is only 256 bytes, it can be used only when data contents are
small. In the event that larger data contents are present, two selections can be used. One is on-chip
MOVX SRAM, the other is the external Data Memory. The on-chip MOVX SRAM can only be accessed
by a MOVX instruction, the same as that for external Data Memory. However, the on-chip RAM has the
fastest access times.
0000h
FFFFh
80h
7Fh
00h
Indirect
Addressing
RAM
Direct &
Indirect
Addressing
RAM
SFRs
Direct
Addressing
FFh
64 K
Bytes
External
Data
Memory
1K Bytes
On-chip SRAM
0000h
03FFh
64K Bytes
On-chip
Program
Memory
APROM
0FFFh
4K Bytes
LDROM
Figure 1. Memory Map
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| W77E516F-40 | 8-BIT MICROCONTROLLER |
| W77E516P-25 | 8-BIT MICROCONTROLLER |
| W77E516P-40 | 8-BIT MICROCONTROLLER |
| W77E532 | 8 BIT MICROCONTROLLER |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| W77E516F-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77E516P-25 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77E516P-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77E532 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E532_07 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
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