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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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9.3.3  
External Reset of TCNT  
When the CCLR1 and CCLR0 bits in TCR are both set to 1, the timer counter is cleared on the  
rising edge of an external reset input. Figure 9.7 shows the timing of this operation. The timer  
reset pulse width must be at least 1.5 system clock (ø) periods.  
ø
External reset  
input (TMRI)  
Internal clear  
pulse  
TCNT  
N – 1  
Figure 9.7 Timing of External Reset  
Setting of TCSR Overflow Flag (OVF)  
N
H'00  
9.3.4  
The overflow flag (OVF) is set to 1 when the timer count overflows (changes from H'FF to H'00).  
Figure 9.8 shows the timing of this operation.  
ø
TCNT  
H'FF  
H'00  
Internal overflow  
signal  
OVF  
Figure 9.8 Setting of Overflow Flag (OVF)  
203  
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