Emerson ATCA-8310, Manual

Page: 264 / 460

CPLD and FPGA
ATCA-8310 Installation and Use (6806800M72D )
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8.2.2 Registers
For register description, the convention shown in Table 8-26Register Default , Table
8-27Register Access Type , Table 8-28Byte Register Layout , and Table 8-29Word Register
Layout .
Table 8-26 Register Default
Default Description
- Not applicable or undefined
0 or 1 Default value after PWR_GOOD is valid or after global reset
deassertion.
Undef. Undefined value
<reset>: 0 or 1 Default value after deassertion of the reset signal <reset>.
PWR_GOOD: 0 or 1 Default value after PWR_GOOD is valid. Any other reset source don't
modify the register content
SPP: 0 or 1 Default value after PWR_GOOD is valid or after SPP reset. A GPP reset
don't modify the register content
Ext. External Reset Source. Default depends on external logic level.
Table 8-27 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
GPP: The prefix "GPP:" signals that the access is restricted to the GPP LPC
interface. E. g.: GPP: r/w means that the register bit is read/writable
from the GPP LPC interface