Bank Timing Registers (BTR0-BTR7)
Address: 87.5000.0A00 - 87.5000.0BC0
The bank timing registers allow for the specific setup of the memory modules. The register allows mixing of memory DIMMs.
Reserved<31:6>RO N/A
SLOW_
PRECHARGE
<5>RW When set, precharge operations are delayed for one cycle more than needed for the next CAS cycle. Some vendor SDRAMS (for example, NEC) require this when operating with a CAS latency of 3.
TOSHIBA<4>RW Toshiba SDRAMS do not permit a new CAS during several odd cycles after CAS. This bit is provided for these devices. It should be noted that the operation of this function is implemented by forcing auto-precharge.
Reserved
_ENABLE
<3>RO Enable subbanks. When set, subbanks are enabled and determined according to the BANK_SIZE table. When clear, subbanks are disabled, and the memRASB_I pins will be asserted only during refreshes.
ROW_ADDR
_HOLD
<2:0>RW The minimum number of sysClk cycles that RAS will be asserted before CAS is asserted.