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SAB82525H-V21 参数 Datasheet PDF下载

SAB82525H-V21图片预览
型号: SAB82525H-V21
PDF下载: 下载PDF文件 查看货源
内容描述: 高层次的串行通信控制器扩展 [High-Level Serial Communication Controller Extended]
分类和应用: 通信控制器
文件页数/大小: 126 页 / 741 K
品牌: SIEMENS [ Siemens Semiconductor Group ]
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SAB 82525  
SAB 82526  
SAF 82525  
SAF 82526  
Specific Applications  
HSCX with SAB 8051 Microcontroller  
For cost-sensitive applications, the HSCX can be interfaced with a small SAB 8051  
microcontroller system (without DMA support) very easily as shown in figure 3.  
+5 V  
+5 V  
DACKA  
INT  
DACKB  
INT0  
RD  
RD  
RD  
Channel A  
Channel B  
WR  
ALE  
WR  
ALE  
WR  
ALE  
CS  
SAB 8051  
CPU  
SAB 82525  
HSCX  
A8 - A15  
A0 - A6  
D0 - D7  
AD0 - AD7  
Latch  
AD0 - AD7  
IM1  
Common Bus  
A0 - A15,D0 - D7  
Memory  
ITS00948  
Figure 3  
HSCX with 8051 CPU  
Although the HSCX provides a demultiplexed bus interface, it can optionally be connected  
directly to the local multiplexed bus of SAB 8051 because of the internal address latch function  
(via ALE, compatibility to SAB 82520 HSCC).  
The address lines A0 … A6 must be wired externally to the data lines D0 … D6 (direct  
connection) in this case.  
Intel bus mode is selected connecting IM1 pin to low (VSS). Since data transfer is controlled by  
interrupt, the DMA acknowledge inputs (DACKA, DACKB) are connected to VDD (+ 5 V).  
Semiconductor Group  
18  
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