EtronTech
EM6A9320
4M x 32 DDR SDRAM
Preliminary (Rev 0.6 5/2006)
Features
Overview
Fast clock rate: 350/333/300/285/250/200 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: 3, 4, 5
- Burst length: 2, 4, 8
The EM6A9320 provides programmable Read or Write
burst lengths of 2, 4, 8. An auto precharge function may
be enabled to provide a self-timed row precharge that is
initiated at the end of the burst sequence.
- Burst Type: Sequential & Interleave
Full page burst length for sequential type only
Start address of full page burst should be even
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The refresh functions, either Auto or Self Refresh are
easy to use.
All inputs except DQ’s & DM are at the positive
edge of the system clock
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.
No Write-Interrupted by Read function
4 individual DM control for write masking only
Auto Refresh and Self Refresh
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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.
4096 refresh cycles / 32ms
Power supplies up to 350/333/300/285MHz:
VDD = 2.8V ± 5%
VDDQ = 2.8V ± 5%
Power supplies up to 250/200MHz:
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VDD = 2.8V ± 5%
VDDQ = 2.8V ± 5%
Interface : SSTL_2 I/O compatible
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Standard 144-ball FBGA package
Ordering Information
Part Number
EM6A9320BI-2.8
EM6A9320BI-3.0
EM6A9320BI-3.3
EM6A9320BI-3.5
EM6A9320BI-3.6
EM6A9320BI-4
EM6A9320BI-5
Frequency Power Supply
Package
FBGA
FBGA
FBGA
FBGA
FBGA
FBGA
FBGA
350MHz
333MHz
300MHz
285MHz
275MHz
250MHz
200MHz
VDD 2.8V
DDQ 2.8V
V
Etron Technology, Inc.
No. 6, Technology Rd. V, Science-Based Industrial Park, Hsinchu, Taiwan 30077, R.O.C.
TEL: (886)-3-5782345 FAX: (886)-3-5778671
Etron Technology, Inc., reserves the right to make changes to its products and specifications without notice.
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