Enhanced PCI Bus Multimedia Controller
1.2.5 Notations and Conventions
External signals:
Capital letters (e.g., IDSEL)
Overbar (e.g., DEVSEL)
Active-low mark [1]
:
Internal function units: capital (non-bold) letters (e.g., VFE)
Buses:
XXmsb_index..lsb_index (e.g., AD31..0)
XXmsb_index:lsb_index (e.g., Mode27:16)
R - read only
Register fields:
Register types:
RC - read-clear. Writing ‘1’ clears the register bit.
RS - read-set. Writing ‘1’ sets the register bit to ‘1’.
RW - read-write (contents of write can be read back)
W - write only (contents of read are meaningless)
Numbers:
Unmarked numbers are decimal (e.g., 365, 23.19). Hexadecimal numbers are marked with a ‘0x’ prefix (e.g., 0xB000,
0x3). Binary numbers are marked with a ‘b’ suffix (e.g., 010b, 0000110100011b).
1. In this document, an overbar is used to denote active low signals. In other documents referenced herein, such as the PCI specifications, the # suffix notation is often
used instead. The two forms of notation are interchangeable. Thus, for example, DEVSEL is equivalent to DEVSEL#.
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