512MB, 1GB, 2GB: (x64, DR) 240-Pin DDR2 SDRAM UDIMM
Pin Assignments and Descriptions
Table 5:
Pin Descriptions
Pin numbers may not correlate with symbols; refer to Table 4 on page 3 for more information
Pin Numbers
Symbol
Type
Description
120
SCL
Input
Serial clock for presence-detect: SCL is used to synchronize the
presence-detect data transfer to and from the module.
101, 239, 240
SA0–SA2
Input
I/O
Presence-detect address inputs: These pins are used to configure
the presence-detect device.
3, 4, 9, 10, 12, 13, 21, 22, 24,
25, 30, 31, 33, 34, 39, 40, 80,
81, 86, 87, 89, 90, 95, 96, 98,
99, 107, 108, 110, 111, 116,
117, 122, 123, 128, 129, 131,
132, 140, 141, 143, 144, 149,
150, 152, 153, 158, 159, 199,
200, 205, 206, 208, 209, 214,
215, 217, 218, 226, 227, 229,
230, 235, 236
DQ0–DQ63
Data Input/output: Bidirectional data bus.
6, 7, 15, 16, 27, 28, 36, 37,
83, 84, 92, 93, 104, 105, 113,
114,
DQS0–DQS7,
DQS0#–DQS7#
I/O
I/O
Data strobe: Output with read data, input with write data for
source synchronous operation. Edge-aligned with read data,
center aligned with write data. DQS# is only used when
differential data strobe mode is enabled via the LOAD MODE
command.
119
SDA
Serial presence-detect data: SDA is a bidirectional pin used to
transfer addresses and data into and out of the presence-detect
portion of the module.
53, 59, 64, 67, 69, 172, 178,
184, 187, 189, 197,
VDD
Supply
Supply
Power supply: +1.8V 0.1V.
51, 56, 62, 72, 75, 78, 170,
175, 181, 191, 194,
VDDQ
DQ Power supply: +1.8V 0.1V.
1
VREF
VSS
Supply
Supply
SSTL_18 reference voltage.
Ground.
2, 5, 8, 11, 14, 17, 20, 23, 26,
29, 32, 35, 38, 41, 44, 47, 50,
65, 66, 79, 82, 85, 88, 91, 94,
97,100, 103, 106, 109,112,
115, 118, 121, 124, 127, 130,
133, 136, 139, 142, 145, 148,
151, 154, 157, 160, 163, 166,
169, 198, 201, 204, 207, 210,
213, 216, 219, 222, 225, 228,
231, 234, 237
238
VDDSPD
NC
Supply
–
Serial EEPROM positive power supply: +1.7V to +3.6V.
No connect: These pins should be left unconnected.
18, 19, 42, 43, 45, 46, 48, 49,
54 (512MB, 1GB), 55, 68, 76,
102, 125, 126, 134, 135, 146,
147, 155, 156, 161, 162, 164,
165, 167, 168, 171, 173, 174,
196 (512MB), 202, 203, 211,
212, 223, 224, 232, 233
PDF: 09005aef80f09084/Source: 09005aef80f09068
HTF16C64_128_256x64AG.fm - Rev. D 5/06 EN
Micron Technology, Inc., reserves the right to change products or specifications without notice.
5
©2003 Micron Technology, Inc. All rights reserved.
MICRON [ MICRON TECHNOLOGY ]
