Specifications

7-98 System Registers
MDRA—Memory Diagnostic Register A
Table 7-48 MDRA Register Bit Definitions
A
ddress
A
ccess
BB + 0000 1980
R/W
MDRA register A is used by diagnostics and manufacturing to
force error conditions in the memory module and isolate failures.
31 30 29 28 27 9 43 08765 12
BXB-0752-92

BRFSH: Burst Refresh
DRFSH: Dis Refresh
RFR
FRUN: Free Run
EXST: Exec Self-Test
MMPS: Moving Inv Pattern Sel
FCAPE: Force Col Addr Par Err
FRAPE: Force Row Addr Par Err
AMEN: Addr Match Ena
RSVD

DEDA: TLSB Data Err Dis
POEMC: Pause on Err Mode Cont
POEM: Pause on Err Mode
Name Bit(s) Type Function
DRFSH
<31> R/W, 0 Disable Refresh. When set, "on-board" refresh
of the module is disabled and diagnostic burst re
-
fresh, bit <30>, is enabled. When this bit is set
concurrently with bit <30>, a burst refresh cycle
will be executed.
BRFSH
<30> W, 0 Burst Refresh. When set, and bit <31> is also
set, a single row address within the addressed
DRAMs will be refreshed as per CAS before RAS
refresh operation. When this bit is set concur-
rently with bit <31>, a burst refresh cycle is exe-
cuted.