DDR memory controller (MPMC)
RM0082
188/844
Doc ID 018672 Rev 1
caslat_lin_gate [3:0]
Adjusts the data capture gate open time by half-cycle expressed
increments number.
This parameter is set differently than caslat_lin one whether there are
fixed offsets in the flight path between the memories and the Memory
Controller for clock gating. When caslat_lin_gate is a larger value than
caslat_lin, the data capture window will become shorter. A
caslat_lin_gate value smaller than caslat_lin may have no effect on the
data capture window, depending on the fixed offsets in the device and
the board.
4'b0000 - 4’b0001 - Reserved
4'b0010 - 1 cycle
4'b0011 - 1.5 cycles
4'b0100 - 2 cycles
4'b0101 - 2.5 cycles
4'b0110 - 3 cycles
4'b0111 - 3.5 cycles
4'b1000 - 4 cycles
4'b1001 - 4.5 cycles
4'b1010 - 5 cycles
4'b1011 - 5.5 cycles
4'b1100 - 6 cycles
4'b1101 - 6.5 cycles
4'b1110 - 7 cycles
4'b1111 - 7.5 cycles
cke_delay [2:0]
Sets the number of additional cycles of delay to include in the CKE
signal cke_status for status reporting. The default delay is 0 cycles.
column_size [2:0]
Shows the difference between the maximum column width available
(14) and the actual number of column pins being used. The user
address is automatically shifted so that its space is mapped
contiguously into the memory map based on the value of this
parameter. For details, refer to
command_age_count [5:0]
Holds the initial value of the command aging counters associated with
each command in the command queue. When using the placement
logic to fill the command queue, the command aging counters
decrement one each time the master aging-rate counter counts down
age_count cycles.
concurrentap [0]
Enables concurrent auto pre-charge. Some DRAM devices do not allow
one bank to be auto pre-charged while another bank is reading or
writing. The JEDEC standard allows concurrent auto pre-charge. Set
this parameter for the DRAM device being used.
1'b0 - Concurrent auto pre-charge disabled.
1'b1 - Concurrent auto pre-charge enabled.
Table 153.
Memory controller parameters (continued)
Parameter
Description
