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2Gb: x16, x32 Mobile LPDDR2 SDRAM S4
Mode Register Definition
Table 18: MR2 Op-Code Bit Definitions
Feature
RL and
WL
Type
Write-only
OP
OP[3:0]
Definition
0001b: RL3/WL1 (default)
0010b: RL4/WL2
0011b: RL5/WL2
0100b: RL6/WL3
0101b: RL7/WL4
0110b: RL8/WL4
All others: Reserved
Table 19: MR3 I/O Configuration 1 (MA[7:0] = 03h)
OP7
OP6
OP5
OP4
OP3
OP2
OP1
OP0
RFU
Table 20: MR3 Op-Code Bit Definitions
DS
Feature
DS
Type
Write-only
OP
OP[3:0]
Definition
0000b: Reserved
0001b: 34.3 ohm typical
0010b: 40 ohm typical (default)
0011b: 48 ohm typical
0100b: 60 ohm typical
0101b: Reserved
0110b: 80 ohm typical
0111b: 120 ohm typical
All others: Reserved
Table 21: MR4 Device Temperature (MA[7:0] = 04h)
OP7
OP6
OP5
OP4
OP3
OP2
OP1
OP0
PDF: 09005aef83f3f2eb
2gb_mobile_lpddr2_s4_g69a.pdf – Rev. N 3/12 EN
TUF
RFU
48
SDRAM refresh rate
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