W632GU6KB Datasheet, PDF (36/160 Pages) Winbond – 16M X 8 BANKS X 16 BIT DDR3L SDRAM

W632GU6KB
8.10.2 MPR Register Address Definition
Table 6 provides an overview of the available data locations, how they are addressed by MR3 A[1:0]
during a MRS to MR3, and how their individual bits are mapped into the burst order bits during a Multi
Purpose Register Read.
Table 6 – MPR Readouts and Burst Order Bit Mapping
MR3 A[2] MR3 A[1:0]
Function
Burst
Length
BL8
1b
00b
Read Pre-defined Pattern
for System Calibration
BC4
BC4
1b
01b
1b
10b
1b
11b
BL8
RFU
BC4
BC4
BL8
RFU
BC4
BC4
BL8
RFU
BC4
BC4
Read
Address
A[2:0]
000b
000b
100b
000b
000b
100b
000b
000b
100b
000b
000b
100b
Burst Order and Data Pattern
Burst order 0,1,2,3,4,5,6,7
Pre-defined Data Pattern [0,1,0,1,0,1,0,1]
Burst order 0,1,2,3
Pre-defined Data Pattern [0,1,0,1]
Burst order 4,5,6,7
Pre-defined Data Pattern [0,1,0,1]
Burst order 0,1,2,3,4,5,6,7
Burst order 0,1,2,3
Burst order 4,5,6,7
Burst order 0,1,2,3,4,5,6,7
Burst order 0,1,2,3
Burst order 4,5,6,7
Burst order 0,1,2,3,4,5,6,7
Burst order 0,1,2,3
Burst order 4,5,6,7
Note: Burst order bit 0 is assigned to LSB and the burst order bit 7 is assigned to MSB of the selected MPR agent.
8.10.3 Relevant Timing Parameters
The following AC timing parameters are important for operating the Multi Purpose Register: tRP, tMRD,
tMOD, and tMPRR. For more details refer to section 10.16 “AC Characteristics” on page 137.
8.10.4 Protocol Example
Protocol Example (This is one example):
Read out pre-determined read-calibration pattern.
Description: Multiple reads from Multi Purpose Register, in order to do system level read timing
calibration based on pre-determined and standardized pattern.
Protocol Steps:
 Precharge All.
 Wait until tRP is satisfied.
 Set MRS, “MR3 A[2] = 1b” and “MR3 A[1:0] = 00b”.
This redirects all subsequent reads and load pre-defined pattern into Multi Purpose Register.
 Wait until tMRD and tMOD are satisfied (Multi Purpose Register is then ready to be read). During the
period MR3 A[2] =1, no data write operation is allowed.
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Publication Release Date: Jan. 20, 2015
Revision: A06