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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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POWER SAVING FUNCTIONS  
16.1 Overview  
16.1.2 Particular function select register 1  
Figure 16.1.3 shows the structure of the particular function select register 1.  
b7 b6 b5 b4 b3 b2 b1 b0  
Particular function select register 1 (Address 6316  
)
0
0
Function  
Bit  
0
Bit name  
At reset R/W  
0 : Normal operation.  
1 : During execution of STP instruction  
STP-instruction-execution  
status bit  
(Note 1) RW  
(Note 2)  
0 : Normal operation.  
1 : During execution of WIT instruction  
WIT-instruction-execution  
status bit  
1
(Note 1) RW  
(Note 2)  
Fix this bit to 0.”  
0
0
2
3
RW  
System clock stop select bit  
at WIT  
0 : In the wait mode, system clock fsys is active.  
1 : In the wait mode, system clock fsys is inactive.  
RW  
(Note 3)  
0
0
0
RW  
Fix this bit to 0.”  
4
5
6
The value is 0at reading.  
Timer B2 clock source select bit 0 : External signal input to the TB2IN pin is counted.  
(Valid in event counter mode.)  
RW  
1 : fX32 is counted.  
The value is 0at reading.  
7
0
Notes 1: At power-on reset, this bit becomes 0.At hardware reset or software reset, this bit retains the value just before reset.  
2: Even when 1is written, the bit status will not change.  
3: Setting this bit to 1must be performed just before execution of the WIT instruction. Also, after the wait state is termi-  
nated, this bit must be cleared to 0immediately.  
Fig. 16.1.3 Structure of particular function select register 1  
(1) System clock stop select bit at WIT (bit 3)  
Setting this bit to 1makes the following clocks inactive in the wait mode: the operating clocks for  
the internal peripheral devices and fsys. (Refer to section 16.2 Inactivity of system clock in wait  
mode.)  
7906 Group Users Manual Rev.2.0  
16-5