256Mb: x4, x8, x16 SDRAM
Pin and Ball Assignments and Descriptions
Figure 6: 54-Ball VFBGA (Top View)
1
2
3
4
5
6
7
8
9
A
B
C
D
E
DQ15
VSSQ
VDDQ
VSSQ
VDDQ
VSS
VDDQ
VSSQ
VDDQ
VSSQ
VDD
CAS#
BA0
A0
DQ0
DQ2
DQ4
DQ6
LDQM
RAS#
BA1
A1
VSS
VDD
DQ1
DQ3
DQ14 DQ13
DQ12 DQ11
DQ10
DQ8
UDQM
A12
DQ9
NC
DQ5
DQ7
WE#
CS#
F
CLK
A11
A7
CKE
A9
G
H
J
A8
A6
A10
VDD
VSS
A5
A4
A3
A2
Depopulated Balls
1. The balls at A4, A5, and A6 are absent from the physical package. They are included to
illustrate that rows 4, 5, and 6 exist, but contain no solder balls.
Note:
PDF: 09005aef8091e6d1
256Mb_sdr.pdf - Rev. R 10/12 EN
Micron Technology, Inc. reserves the right to change products or specifications without notice.
13
© 1999 Micron Technology, Inc. All rights reserved.
MICRON [ MICRON TECHNOLOGY ]
