MC-458CB64ESB Datasheet, PDF (10/16 Pages) NEC – 8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE SO DIMM

MC-458CB64ESB, 458CB64PSB
5 Serial PD
(1/2)
Byte No.
Function Described
Hex Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Notes
0 Defines the number of bytes written into
80H 1
0
0
0
0
0
0
0 128 bytes
serial PD memory
1 Total number of bytes of serial PD memory
08H 0
0
0
0
1
0
0
0 256 bytes
2 Fundamental memory type
04H 0
0
0
0
0
1
0
0 SDRAM
3 Number of rows
0CH 0
0
0
0
1
1
0
0 12 rows
4 Number of columns
09H 0
0
0
0
1
0
0
1 9 columns
5 Number of banks
01H 0
0
0
0
0
0
0
1 1 bank
6 Data width
40H 0
1
0
0
0
0
0
0 64 bits
7 Data width (continued)
00H 0
0
0
0
0
0
0
00
8 Voltage interface
01H 0
0
0
0
0
0
0
1 LVTTL
9 CL = 3 Cycle time
-A10B A0H 1
0
1
0
0
0
0
0 10 ns
10 CL =3 Access time
-A10B 70H 0
1
1
1
0
0
0
0 7 ns
11 DIMM configuration type
00H 0
0
0
0
0
0
0
0 Non-parity
12 Refresh rate/type
13 SDRAM width
14 Error checking SDRAM width
80H 1
0
0
0
0
0
0
0 Normal
10H 0
0
0
1
0
0
0
0 ×16
00H 0
0
0
0
0
0
0
0 None
15 Minimum clock delay
01H 0
0
0
0
0
0
0
1 1 clock
16 Burst length supported
8FH 1
0
0
0
1
1
1
1 1, 2, 4, 8, F
17 Number of banks on each SDRAM
04H 0
0
0
0
0
1
0
0 4 banks
18 /CAS latency supported
06H 0
0
0
0
0
1
1
0 2, 3
19 /CS latency supported
01H 0
0
0
0
0
0
0
10
20 /WE latency supported
01H 0
0
0
0
0
0
0
10
21 SDRAM module attributes
00H 0
0
0
0
0
0
0
0
22 SDRAM device attributes: General
0EH 0
0
0
0
1
1
1
0
23 CL = 2 Cycle time
-A10B F0H 1
1
1
1
0
0
0
0 15 ns
24 CL = 2 Access time
-A10B 80H 1
0
0
0
0
0
0
0 8 ns
25-26
00H 0
0
0
0
0
0
0
0
27
tRP(MIN.)
28
tRRD(MIN.)
29
tRCD(MIN.)
30
tRAS(MIN.)
-A10B 1EH 0
0
0
1
1
1
1
0 30 ns
-A10B 14H 0
0
0
1
0
1
0
0 20 ns
-A10B 1EH 0
0
0
1
1
1
1
0 30 ns
-A10B 3CH 0
0
1
1
1
1
0
0 60 ns
10
Data Sheet M12263EJAV0DS00