em636165 Etron Technology Inc., em636165 Datasheet - Page 5

• Manufacturer Part Number: em636165
• Description: 1m X 16 Bit Synchronous Dram Sdram
• Manufacturer: Etron Technology Inc.

Etron Confidential
DQ0-DQ15 Input/Output Data I/O: The DQ0-15 input and output data are synchronized with the positive
LDQM,
UDQM
V
V
V
V
NC
DDQ
SSQ
DD
SS
Supply
Supply
Supply
Supply
Input
-
Data Input/Output Mask: LDQM and UDQM are byte specific, nonpersistent
I/O buffer controls. The I/O buffers are placed in a high-z state when
LDQM/UDQM is sampled HIGH. Input data is masked when LDQM/UDQM is
sampled HIGH during a write cycle. Output data is masked (two-clock latency)
when LDQM/UDQM is sampled HIGH during a read cycle. UDQM masks DQ15-
DQ8, and LDQM masks DQ7-DQ0.
edges of CLK. The I/Os are byte-maskable during Reads and Writes.
No Connect: These pins should be left unconnected.
DQ Power: Provide isolated power to DQs for improved noise immunity.
( 3.3V ± 0.3V )
DQ Ground: Provide isolated ground to DQs for improved noise immunity.
( 0 V )
Power Supply: +3.3V ± 0.3V
Ground
5
Rev. 3.4
EM636165
Apr. 2008