Artesyn ATCA 7370 / ATCA 7370-S Installation and Use (January 2015) - Manual (Page 123)

Maps and Registers
ATCA-7370/ATCA-7370-S Installation and Use (6806800P54H) 123
6.2.1 Register Decoding
The FPGA registers may be accessed from the host or the IPMI. For the host, the LPC bus
interface is used. The IPMC uses an SPI interface.
6.2.1.1 LPC Decoding
The LPC bus supports different protocols.
: 0
or 1 Default value after deassertion of the reset signal .
Ext. External Reset Source. Default depends on external logic level.
Table 6-7 Register Access Type
Access Description
r Read only
w Write only
r/w Read and write
w1c Write-1-to-clear, ignore bit while reading
r/w1c Read and write-1-to-clear, write 0 has no effect
r/w1s Read and write-1-to-set, write 0 has no effect
r/w1t Read and write-1-to-toggle, write 0 has no effect
LPC The prefix "LPC:" signals that the access is restricted to the LPC
interface.
For example, LPC: r/w means that the register bit is
readable/writable from the LPC interface
IPMC The prefix "IPMC:" signals that the access is restricted to the IPMC
SPI interface.
For example, IPMC: r/w means that the register bit is
readable/writable from IPMC SPI interface
Table 6-6 Register Default (continued)
Default Description