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7906 参数 Datasheet PDF下载

7906图片预览
型号: 7906
PDF下载: 下载PDF文件 查看货源
内容描述: 16位单片机 [16-BIT SINGLE-CHIP MICROCOMPUTER]
分类和应用: 计算机
文件页数/大小: 531 页 / 3056 K
品牌: RENESAS [ RENESAS TECHNOLOGY CORP ]
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APPENDIX  
Appendix 2. Control registers  
Appendix 2. Control registers  
The control registers allocated in the SFR area are shown on the following pages.  
Below is the structure diagram for all registers.  
3  
2  
1  
b7 b6 b5 b4 b3 b2 b1 b0  
XXX register (address XX16)  
4  
5  
X 0  
Function  
Bit  
Bit name  
• • • select bit  
At reset R/W  
Reference  
3-10  
0
0 : …  
1 : …  
Undefined WO  
The value is “0” at reading.  
b2 b1  
3-11  
1
2
3
• • • select bit  
0
0
0
RW  
RW  
RO  
0 0 : …  
0 1 : …  
1 0 : …  
1 1 : …  
2-6  
0 : …  
1 : …  
• • • flag  
Fix this bit to “0.”  
0
RW  
RW  
4
5
6
7
This bit is invalid in … mode.  
Nothing is assigned.  
0
Undefined  
0
The value is “0” at reading.  
6  
1  
Blank  
: Set to 0or 1according to the usage.  
0
: Set to 0at writing.  
1
: Set to 1at writing.  
: Invalid depending on the mode or state. It may be 0or 1.”  
: Nothing is assigned.  
2  
3  
0
1
: 0immediately after reset.  
: 1immediately after reset.  
: Undefined immediately after reset.  
Undefined  
RW  
RO  
: It is possible to read the bit state at reading. The written value becomes valid.  
: It is possible to read the bit state at reading. The written value becomes invalid. Accordingly, the written  
value may be 0or 1.”  
WO  
: The written value becomes valid. It is impossible to read the bit state. The value is undefined at reading.  
However, when [0at reading] is indicated in the Functionor Notecolumn, the bit is always 0at  
reading. (See5 above.)  
: It is impossible to read the bit state. The value is undefined at reading.  
However, when [0at reading] is indicated in the Functionor Notecolumn, the bit is always 0at  
reading. (See6 above.)  
The written value becomes invalid. Accordingly, the written value may be 0or 1.”  
Reference page for each bit.  
4  
7906 Group User’s Manual Rev.2.0  
20-10  
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