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ICS1893CKI Datasheet(PDF) 5 Page - Integrated Circuit Systems |
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ICS1893CKI Datasheet(HTML) 5 Page - Integrated Circuit Systems |
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5 / 126 page  Chapter 2 Conventions and Nomenclature ICS1893CF, Rev. F, 03/01/07 Mar. 2007 5 ICS1893CF Data Sheet Rev. F - Release Copyright © 2007, Integrated Device Technology, Inc. All rights reserved. Chapter 2 Conventions and Nomenclature Table 2-1 lists and explains the conventions and nomenclature used throughout this data sheet. Table 2-1. Conventions and Nomenclature Item Convention / Nomenclature Bits • A bit in a register is identified using the format ‘register.bit’. For example, bit 0.15 is bit 15 of register 0. • When a colon is used with bits, it indicates the range of bits. For example, bits 1.15:11 are bits 15, 14, 13, 12, and 11 of register 1. • For a range of bits, the order is always from the most-significant bit to the least-significant bit. Code groups Within this table, see the item ‘Symbols’ Colon (:) Within this table, see these items: • ‘Bits’ • ‘Pin (or signal) names’ Numbers • As a default, all numbers use the decimal system (that is, base 10) unless followed by a lowercase letter. A string of numbers followed by a lowercase letter: – A ‘b’ represents a binary (base 2) number – An ‘h’ represents a hexadecimal (base 16) number – An ‘o’ represents an octal (base 8) number • All numerical references to registers use decimal notation (and not hexadecimal). Pin (or signal) names • All pin or signal names are provided in capital letters. • A pin name that includes a forward slash ‘/’ is a multi-function, configuration pin. These pins provide the ability to select between two ICS1893CF functions. The name provided: – Before the ‘/’ indicates the pin name and function when the signal level on the pin is logic zero. – After the ‘/’ indicates the pin name and function when the signal level on the pin is logic one. For example, the HW/SW pin selects between Hardware (HW) mode and Software (SW) mode. When the signal level on the HW/SW pin is logic: – Zero, the ICS1893CF Hardware mode is selected. – One, the ICS1893CF Software mode is selected. • An ‘n’ appended to the end of a pin name or signal name (such as RESETn) indicates an active-low operation. • When a colon is used with pin or signal names, it indicates a range. For example, TXD[3:0] represents pins/signals TXD3, TXD2, TXD1, and TXD0. • When pin name abbreviations are spelled out, words in parentheses indicate additional description that is not part of the pin name abbreviation. Registers • A bit in a register is identified using the format ‘register.bit’. For example, bit 0.15 is bit 15 of register 0. • All numerical references to registers use decimal notation (and not hexadecimal). • When register name abbreviations are spelled out, words in parentheses indicate additional description that is not part of the register name abbreviation. |
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