256MB, 512MB, 1GB, 2GB (x64, DR)
184-PIN DDR SDRAM UDIMM
Ta b le 5:
Pin De scrip t io n s (Co n t in u e d )
Pin numbers may not correlate with symbols; refer to Pin Assignment tables on page 3 for more information
PIN NUMBERS
SYMBOL
TYPE
DESCRIPTION
2, 4, 6, 8, 12, 13, 19, 20, 23,
24, 28, 31, 33, 35, 39, 40, 53,
55, 57, 60, 61, 64, 68, 69, 72,
73, 79, 80, 83, 84, 87, 88, 94,
95, 98, 99, 105, 106, 109, 110,
114, 117, 121, 123, 126, 127,
131, 133, 146, 147, 150, 151,
153, 155, 161, 162, 165, 166,
170, 171, 174, 175, 178, 179
DQ0–DQ63
Input/
Output
Data I/Os: Data bus.
92
181,182, 183
91
SCL
SA0–SA2
SDA
Input
Serial Clock for Presence-Detect: SCL is used to synchronize the
presence-detect data transfer to and from the module.
Input Presence-Detect Address Inputs: These pins are used to
configure the presence-detect device.
Input/
Output
Serial Presence-Detect Data: SDA is a bidirectional pin used to
transfer addresses and data into and out of the presence-
detect device.
1
VREF
Supply SSTL_2 reference voltage.
15, 22, 30, 54, 62, 77, 96, 104,
112, 128, 136, 143, 156, 164,
172, 180
VDDQ
Supply DQ Power Supply: +2.5V ±0.2V.
7, 38, 46, 70, 85, 108, 120,
148, 168
VDD
VSS
Supply
Supply
Power Supply: +2.5V ±0.2V.
Ground.
3, 11, 18, 26, 34, 42, 50, 58,
66, 74, 81, 89, 93, 100, 116,
124, 132, 139, 145, 152, 160,
176
184
VDDSPD
DNU
Supply Serial EEPROM positive power supply: +2.3V to +3.6V.
44, 45, 47, 49, 51, 134, 135,
140, 142, 144
—
Do Not Use: These pins are not connected on these modules,
but are assigned pins on other modules in this product family.
9, 10, 71, 82, 90, 101, 102,
103, 113, 115 (256MB), 163,
167 (256MB, 512MB, 1GB),
173
NC
—
No Connect: These pins should be left unconnected.
pdf: 09005aef80739fa5, source: 09005aef807397e5
DD16C32_64_128_256x64AG.fm - Rev. C 9/04 EN
Micron Technology, Inc., reserves the right to change products or specifications without notice.
5
©2004 Micron Technology, Inc.
MICRON [ MICRON TECHNOLOGY ]
