ICS1892YT IDT, Integrated Device Technology Inc, ICS1892YT Datasheet - Page 11
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ICS1892YT
Manufacturer Part Number
ICS1892YT
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.ICS1892YT.pdf
(148 pages)
Specifications of ICS1892YT
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Chapter 2 Conventions and Nomenclature
ICS1892, Rev. D, 2/26/01
Table 2-1
Table 2-1. Conventions and Nomenclature
Asterisk (*)
Bits
Code groups
Colon (:)
Numbers
Pin (or signal) names
ICS1892
lists and explains the conventions and nomenclature used throughout this data sheet.
Item
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
Within this table, see the item ‘Pin (or signal) names’
Within this table, see the item ‘Symbols’
Within this table, see these items:
•
•
•
•
•
•
•
•
•
•
•
•
For example, the HW/SW pin selects between Hardware (HW) mode and
Software (SW) mode.
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.
‘Bits’
‘Pin (or signal) names’
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).
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 ICS1892
functions. The name provided:
– Before the ‘/’ indicates the pin name and function when the signal level
– After the ‘/’ indicates the pin name and function when the signal level on
– When the signal level on the HW/SW pin is logic zero, the ICS1892
– When the signal level on the HW/SW pin is logic one, the ICS1892
An asterisk appended to the end of a pin name or signal name (such as
RESET*) 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.
on the pin is logic zero.
the pin is logic one.
Hardware mode is selected.
Software mode is selected.
11
Convention / Nomenclature
Chapter 2 Conventions and Nomenclature
February 26, 2001
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