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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  
HSCX with SAB 80188 Microprocessor  
A system with minimized additional hardware expense can be with a SAB 80188  
microprocessor as shown in figure 4.  
+5 V  
INTn  
PSCn  
CS  
INT  
IM1  
Serial  
Channel A  
DRQ0  
DRQTA  
DRQ1  
DRQRA  
DACKA  
ALE  
SAB 80188  
CPU  
SAB 82525  
HSCX  
Serial  
Channel B  
+5 V  
DACKB  
A8 - A15  
AD0 - AD7  
A0 - A6  
D0 - D7  
Latches  
Transceiver  
System Bus  
A0-A6  
D0-D7  
System  
Memory  
ITS00949  
Figure 4  
HSCX with SAB 80188 CPU  
The HSCX is connected to the demultiplexed system bus. Data transfer for one serial channel  
can be done by the 2-channel on-chip DMA controller of the SAB 80188, the other channel is  
serviced by interrupt. Since the SAB 80188 does not provide DMA acknowledge outputs, data  
transfer from/to HSCX is controlled via CS, RD or WR address information (A0 … A6) and the  
DACKA, DACKB inputs are not used.  
This solution supports applications with a high speed data rate in one serial channel with  
minimum hardware expense making use of the on-chip peripheral functions of the SAB 80188  
(chip select logic, interrupt controller, DMA controller).  
Semiconductor Group  
19  
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