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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  
1.1 Pin Definitions and Functions  
Pin No.  
Symbol  
Input (I)  
Function  
Output (O)  
P-LCC P-MQFP  
42  
43  
44  
1
2
3
3
4
5
6
7
8
9
10  
D0  
D1  
D2  
D3  
D4  
D5  
D6  
D7  
I/O  
Data Bus  
The data bus lines are bidirectional threestate lines which  
interface with the system’s data bus.  
These lines carry data and command/status to and from  
the HSCX.  
4
5
6
11  
I
Read, Intel bus mode, IM1 connected to low  
RD/IC1  
This signal indicates a read operation. When the HSCX is  
selected via CS the read signal enables the bus drivers to  
put data from an internal register addressed via A0-A6 on  
the data bus.  
When the HSCX is selected for DMA transfers via DACK,  
the RD signal enables the bus driver to put data from the  
respective receive FIFO on the data bus. Inputs to A0-A6  
are ignored.  
Input Control 1, Motorola bus mode IM1 connected to  
high.  
If Motorola bus mode has been selected this pin serves  
either as  
E = Enable, active high (IM0 tied to low) or  
DS = Data Strobe, active low (IM0 tied to high)  
input (depending on the selection via IM0) to control read/  
write operations.  
7
12  
I
Write, Intel bus mode  
WR/IC0  
This signal indicates a write operation. When CS is active  
the HSCX loads an internal register with data provided via  
the data bus. When DACK is active for DMA transfers the  
HSCX loads data from the data bus on the top of the  
respective transmit FIFO.  
Input Control Motorola bus mode  
In Motorola bus mode, this pin serves as the R/W input to  
distinguish between read or write operations.  
8
13  
I
Chip Select  
CS  
A low signal selects the HSCX for a read/write operation.  
Semiconductor Group  
10  
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