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HD6473434F16 参数 Datasheet PDF下载

HD6473434F16图片预览
型号: HD6473434F16
PDF下载: 下载PDF文件 查看货源
内容描述: 12伏不能应用于S -掩模模型(单电源规格) ,因为这可能会永久损坏设备。 [12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.]
分类和应用: 外围集成电路微控制器可编程只读存储器时钟
文件页数/大小: 752 页 / 2557 K
品牌: HITACHI [ HITACHI SEMICONDUCTOR ]
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11.3.2 Interval Timer Mode  
Interval timer operation begins when the WT/IT bit is cleared to 0 and the TME bit is set to 1.  
In interval timer mode, an WOVF request is generated each time the timer count overflows. This  
function can be used to generate WOVF requests at regular intervals. See figure 11.4.  
H'FF  
TCNT count  
H'00  
Time t  
WT/IT = 0  
TME = 1 request  
OVF  
OVF  
request  
OVF  
request  
OVF  
request  
OVF  
request  
Figure 11.4 Operation in Interval Timer Mode  
11.3.3 Setting the Overflow Flag  
The WOVF bit is set to 1 when the timer count overflows. Simultaneously, the WDT module  
requests an internal reset, NMI, or OVF interrupt. The timing is shown in figure 11.5.  
ø
H'FF H'00  
TCNT  
Internal overflow  
signal  
OVF  
Figure 11.5 Setting the OVF Bit  
228  
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