EtronTech
EM6A9320BI
4Mx32 DDR SDRAM
4M x 32 DDR SDRAM
(Rev 0.9C May/2006)
Features
Overview
Fast clock rate: 250/200/166 MHz
Differential Clock CK & CK# input
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The EM6A9320 DDR SDRAM is a high-speed CMOS
double data rate synchronous DRAM containing 128
Mbits. It is internally configured as a quad 1M x 32
DRAM with a synchronous interface (all signals are
registered on the positive edge of the clock signal, CK).
4 Bi-directional DQS. Data transactions on both
edges of DQS (1DQS / Byte)
DLL aligns DQ and DQS transitions
Edge aligned data & DQS output
Center aligned data & DQS input
4 internal banks, 1M x 32-bit for each bank
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Data outputs occur at both rising edges of CK and CK#.
Read and write accesses to the SDRAM are burst
oriented; accesses start at a selected location and
continue for a programmed number of locations in a
programmed sequence.
Programmable mode and extended mode
registers
Accesses begin with the registration of a BankActivate
command, which is then followed by a Read or Write
command.
- CAS Latency: 2, 2.5, 3, 4
- Burst length: 2, 4, 8, and Full Page
- Burst Type: Sequential & Interleave
Full page burst length for sequential type only
Start address of full page burst should be even
The EM6A9320 provides programmable Read or Write
burst lengths of 2, 4, 8 and full page. An auto precharge
function may be enabled to provide a self-timed row
precharge that is initiated at the end of the burst
sequence.
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All inputs except DQ’s & DM are at the positive
edge of the system clock
The refresh functions, either Auto or Self Refresh are
easy to use.
No Write-Interrupted by Read function
4 individual DM control for write masking only
Auto Refresh and Self Refresh
4096 refresh cycles / 32ms
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In addition, EM6A9320 features programmable DLL
option. By having a programmable mode register and
extended mode register, the system can choose the
most suitable modes to maximize its performance.
These devices are well suited for applications requiring
high memory bandwidth, result in a device particularly
well suited to high performance main memory and
graphics applications.
Power supplies :
VDD = 2.5V ± 5%
VDDQ = 2.5V ± 5%
Interface : SSTL_2 I/O compatible
Standard 144-ball FBGA package
Pb-free package is availiable
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Ordering Information
Part Number
EM6A9320BI-4M
EM6A9320BI-4MG
EM6A9320BI-5M
EM6A9320BI-5MG
EM6A9320BI-6M
Frequency Power Supply Package
250MHz
250MHz
200MHz
200MHz
166MHz
166MHz
FBGA
FBGA
FBGA
FBGA
FBGA
FBGA
VDD 2.5V
DDQ 2.5V
V
EM6A9320BI-6MG
G : indicates Pb Free package.
ETRON [ ETRON TECHNOLOGY, INC. ]
