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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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TIMER B  
8.5 Pulse period/Pulse width measurement mode  
Table 8.5.2 Specifications of pulse period/pulse width measurement mode (when free-run type is selected)  
Item  
Specifications  
Count source f  
i
f2, f16, f64, or f512  
Count operation  
Countup  
Counter value is transferred to the reload register at valid edge of  
measurement pulse, and counting continues.  
When a counter overflow occurs, the timer Bi overflow flag is set to  
1,and counting continues after clearing the counter value to 000016.”  
When the count start bit is set to 1.”  
Count start condition  
Count stop condition  
When the count start bit is cleared to 0.”  
Interrupt request occurrence timing When a valid edge of measurement pulse is input (Note 1).  
TBiIN pins function  
Measurement pulse input pin (Note 2)  
The value obtained by reading the timer Bi register is the reload  
registers contents (Measurement result) (Note 3).  
Invalid  
Read from timer Bi register  
Write to timer Bi register  
Timer Bi overflow flag: This bit is used to identify the source of an interrupt request occurrence.  
Notes 1: No interrupt request occurs when the first valid edge is input after the counter starts counting.  
2: When using timer B2, make sure that the timer B2 clock source select bit (see Figure 8.4.2.) =  
0.”  
3: The value read out from the timer Bi register is undefined in the period after the counter starts  
counting until the second valid edge is input.  
7906 Group Users Manual Rev.2.0  
8-20  
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