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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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CL  
L
Rs  
XTAL  
EXTAL  
C0  
AT-cut parallel resonating crystal  
Figure 6.3 Equivalent Circuit of External Crystal  
Table 6.2 External Crystal Parameters  
Frequency  
Rs max ()  
C0 (pF)  
(MHz)  
500  
24  
12  
8
0
10  
80  
1126  
70  
60  
50  
7 pF max 7 pF max 7 pF max 7 pF max 7 pF max 7 pF max  
Use a crystal with the same frequency as the desired system clock frequency (ø).  
Note on Board Design: When an external crystal is connected, other signal lines should be kept  
away from the crystal circuit to prevent induction from interfering with correct oscillation. See  
figure 6.4. The crystal and its load capacitors should be placed as close as possible to the XTAL  
and EXTAL pins.  
Not allowed  
Signal A  
Signal B  
CL2  
XTAL  
EXTAL  
CL1  
Figure 6.4 Notes on Board Design around External Crystal  
92  
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