MT40A512M8RH-075EAUT Datasheet, PDF (312/359 Pages) Micron Technology – Automotive DDR4 SDRAM

4Gb: x8, x16 Automotive DDR4 SDRAM
Current Specifications – Patterns and Test Conditions
Table 138: I_DD1 Measurement – Loop Pattern¹
Data³
0
0
ACT 0 0 0 0 0 0 0 0 0 0 0 0 0 0
–
1, 2
D, D 1 0 0 0 0 0 0 0 0 0 0 0 0 0
–
3, 4
D_n, D_n 1 1 1 1 1 0 3 3 0 0 0 7 F 0
–
...
Repeat pattern 1...4 until nRCD - AL - 1; truncate if necessary
nRCD - AL
...
nRAS
...
RD
0 1 1 0 1 0 0 0 0 0 0 0 0 0 D0 = 00, D1 =
Repeat pattern 1...4 until nRAS - 1; truncate if necessary
PRE 0 1 0 1 0 0 0 0 0 0 0 0 0 0
Repeat pattern 1...4 until nRC - 1; truncate if necessary
FF,
D2 = FF, D3 =
00,
D4 = FF, D5 =
00,
D5 = 00, D7 = FF
1 1 × nRC + 0 ACT 0 0 0 1 1 0 1 1 0 0 0 0 0 0
–
1 × nRC + 1, D, D 1 0 0 0 0 0 0 0 0 0 0 0 0 0
–
2
1 × nRC + 3, D_n, D_n 1 1 1 1 1 0 3 3 0 0 0 7 F 0
–
4
...
Repeat pattern nRC + 1...4 until 1 × nRC + nRAS - 1; truncate if necessary
1 × nRC
+nRCD - AL
...
1 × nRC +
nRAS
...
RD
0110101100000
Repeat pattern 1...4 until nRAS - 1; truncate if necessary
PRE 0 1 0 1 0 0 1 1 0 0 0 0 0
Repeat pattern nRC + 1...4 until 2 × nRC - 1; truncate if necessary
0 D0 = FF, D1 =
00,
D2 = 00, D3 =
0
FF,
D4 = 00, D5 =
FF,
D5 = FF, D7 = 00
2 2 × nRC
Repeat sub-loop 0, use BG[1:0] = 0, use BA[1:0] = 2 instead
3 3 × nRC
Repeat sub-loop 0, use BG[1:0] = 1, use BA[1:0] = 3 instead
4 4 × nRC
Repeat sub-loop 0, use BG[1:0] = 0, use BA[1:0] = 1 instead
5 5 × nRC
Repeat sub-loop 0, use BG[1:0] = 1, use BA[1:0] = 2 instead
6 6 × nRC
Repeat sub-loop 0, use BG[1:0] = 0, use BA[1:0] = 3 instead
7 7 × nRC
Repeat sub-loop 0, use BG[1:0] = 1, use BA[1:0] = 0 instead
8 9 × nRC
Repeat sub-loop 0, use BG[1:0] = 2, use BA[1:0] = 0 instead ⁴
9 10 × nRC
Repeat sub-loop 0, use BG[1:0] = 3, use BA[1:0] = 1 instead ⁴
10 11 × nRC
Repeat sub-loop 0, use BG[1:0] = 2, use BA[1:0] = 2 instead ⁴
11 12 × nRC
Repeat sub-loop 0, use BG[1:0] = 3, use BA[1:0] = 3 instead ⁴
12 13 × nRC
Repeat sub-loop 0, use BG[1:0] = 2, use BA[1:0] = 1 instead ⁴
13 14 × nRC
Repeat sub-loop 0, use BG[1:0] = 3, use BA[1:0] = 2 instead ⁴
14 15 × nRC
Repeat sub-loop 0, use BG[1:0] = 2, use BA[1:0] = 3 instead ⁴
15 16 × nRC
Repeat sub-loop 0, use BG[1:0] = 3, use BA[1:0] = 0 instead ⁴
Notes:
CCMTD-1725822587-10418
4gb_auto_ddr4_sdram_z90b.pdf - Rev. D 01/17 EN
1. DQS_t, DQS_c are V_DDQ when not toggling.
312
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