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AN1063D 参数 Datasheet PDF下载

AN1063D图片预览
型号: AN1063D
PDF下载: 下载PDF文件 查看货源
内容描述: 集成的处理器与DMA USERA ????手册 [Integrated Processor with DMA User’s Manual]
分类和应用:
文件页数/大小: 441 页 / 2488 K
品牌: FREESCALE [ Freescale ]
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Freescale Semiconductor, Inc.  
DSCLK, the gated serial clock, is normally high, but it pulses low for each bit to be  
transferred. At the end of the seventeenth clock period, it remains high until the start of the  
next transmission. Clock frequency is implementation dependent and may range from DC  
to the maximum specified frequency. Although performance considerations might dictate a  
hardware implementation, software solutions can be used provided serial bus timing is  
maintained.  
5.6.2.8 COMMAND SET. The following paragraphs describe the command set available in  
BDM.  
5.6.2.8.1 Command Format. The following standard bit format is utilized by all BDM  
commands.  
15  
10  
9
0
8
7
6
5
0
4
0
3
2
0
OPERATION  
R/W  
OP SIZE  
A/D  
REGISTER  
EXTENSION WORD(S)  
Bits 15–0—Operation Field  
The operation field specifies the commands. This 6-bit field provides for a maximum of  
64 unique commands.  
R/W Field  
The R/W field specifies the direction of operand transfer. When the bit is set, the  
transfer is from CPU to development system. When the bit is cleared, data is written to  
the CPU or to memory from the development system.  
Operand Size  
For sized operations, this field specifies the operand data size. All addresses are  
expressed as 32-bit absolute values. The size field is encoded as listed in Table 5-22.  
Table 5-22. Size Field Encoding  
Encoding  
Operand Size  
Byte  
00  
01  
10  
11  
Word  
Long  
Reserved  
Address/Data (A/D) Field  
The A/D field is used by commands that operate on address and data registers. It  
determines whether the register field specifies a data or address register. One indicates  
an address register; zero indicates a data register. For other commands, this field may  
be interpreted differently.  
MOTOROLA  
MC68340 USER’S MANUAL  
5- 73  
For More Information On This Product,  
Go to: www.freescale.com  
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