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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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Section 17 RAM  
17.1  
Overview  
The H8/3437 and H8/3436 have 2 kbytes of on-chip static RAM. The H8/3434 has 1 kbyte. The  
RAM is connected to the CPU by a 16-bit data bus. Both byte and word access to the on-chip  
RAM are performed in two states, enabling rapid data transfer and instruction execution.  
The on-chip RAM is assigned to addresses H'F780 to H'FF7F in the address space of the H8/3437  
and H8/3436, and addresses H'FB80 to H'FF7F in the address space of the H8/3434. The RAME  
bit in the system control register (SYSCR) can enable or disable the on-chip RAM.  
17.1.1 Block Diagram  
Figure 17.1 is a block diagram of the on-chip RAM.  
Internal data bus (upper 8 bits)  
Internal data bus (lower 8 bits)  
H'F780  
H'F782  
H'F781  
H'F783  
On-chip RAM  
H'FF7E  
H'FF7F  
Even address  
Odd address  
Figure 17.1 Block Diagram of On-Chip RAM (H8/3437)  
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