參數(shù)資料
型號： 03H4969
元件分類： 通信及網(wǎng)絡(luò)
英文描述： SPECIALTY TELECOM CIRCUIT, PQFP100
封裝： 14 X 20 MM, 2.70 MM HEIGHT, 0.65 MM PITCH, PLASTIC, FP-100
文件頁數(shù)： 38/48頁
文件大?。?/td> 464K
代理商： 03H4969
Product Part Number: IBM22-ALDC1005S
ALDC1-5S
I B M Microelectronics
Document Number: DCALD5DSU-04
Data Compression
Appendix A. Notation
A.1 Bit Significance
Bit numbering and bit significance notation
follow the industry standard usage convention.
That is, lower bit numbers have lower bit signif-
icance and higher bit numbers have higher bit
significance.
A range of bits is noted by writing the most sig-
nificant bit and the least significant bit of the
range separated by a colon (:). For example,
bits zero through seven on a bus are written
7:0. Or, bits two through five of a register
named SAMP are written SAMP(5:2).
A.2 Binary Numbering
Binary numbers are denoted by B'##' in this
document, where ## is the binary number
being represented. For example, B'1010' is the
binary representation for decimal ten.
B'11000101' is equivalent to 197.
A.3 Hexadecimal Numbering
Hexadecimal numbers are denoted by X'##' in
this document, where ## is the hexadecimal
number to be represented. For example, X'A'
is the hexadecimal representation for decimal
ten. X'2CBE' is equivalent to 11454.
A.4 Direct Memory Access
Direct Memory Access (DMA) is a common,
asynchronous handshaking protocol used to
send and receive information between compo-
nents of digital systems. Within this document,
references are made to DMA devices and DMA
controllers.
DMA Device
A direct memory access device is
any circuitry which generates a DMA
Request signal and receives a DMA
Acknowledge signal.
DMA Controller
A direct memory access controller is
any circuitry which receives a DMA
Request signal and generates a
DMA Acknowledge signal.
(C) IBM CORP. 1993, 1994. ALL RIGHTS RESERVED. USE IS FURTHER SUBJECT TO THE PROVISIONS ON THE BACK OF THE TITLE PAGE.
A-1
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