AS4C32M16D1
32M x 16 bit DDR Synchronous DRAM (SDRAM)
Alliance Memory Confidential Advanced (Rev. 1.1, July / 2011)
Overview
Features
The 512Mb DDR AS4C32M16D1 SDRAM is a high-
Fast clock rate: 200MHz
speed CMOS double data rate synchronous DRAM
Differential Clock CK &
CK
containing 512 Mbits. It is internally configured as a
Bi-directional DQS
quad 8M x 16 DRAM with a synchronous interface (all
DLL enable/disable by EMRS signals are registered on the positive edge of the clock
signal, CK). Data outputs occur at both rising edges of
Fully synchronous operation
CK and .d Read and write accesses to the SDRAM
Internal pipeline architecture CK
are burst oriented; accesses start at a selected location
Four internal banks, 8M x 16-bit for each bank
and continue for a programmed number of locations in a
Programmable Mode and Extended Mode registers
programmed sequence. Accesses begin with the
- CAS Latency: 2, 2.5, 3
registration of a BankActivate command which is then
- Burst length: 2, 4, 8
followed by a Read or Write command. The DDR
- Burst Type: Sequential & Interleaved
SDRAM provides programmable Read or Write burst
Individual byte-write mask control
lengths of 2, 4, or 8. An auto precharge function may be
DM Write Latency = 0
enabled to provide a self-timed row precharge that is
initiated at the end of the burst sequence. The refresh
Auto Refresh and Self Refresh
functions, either Auto or Self Refresh are easy to use. In
8192 refresh cycles / 64ms
addition, The DDR AS4C32M16D1 features
Operating temperature range
programmable DLL option. By having a programmable
- Commercial (0 ~ 70C)
mode register and extended mode register, the system
- Industrial (-40 ~ 85C)
can choose the most suitable modes to maximize its
Precharge & active power down
performance. These devices are well suited for
Power supplies: VDD & VDDQ = 2.5V 0.2V
applications requiring high memory bandwidth and high
Interface: SSTL_2 I/O Interface
performance.
Package: 66 Pin TSOP II, 0.65mm pin pitch
- Pb and Halogen free
Table 1.Ordering Information
Part Number Clock Data Rate Package Temperature Temp Range
AS4C32M16D1-5TCN 200MHz 400Mbps/pin 66pin TSOPII Commercial 0 ~ 70C
Industrial -40 ~ 85C
AS4C32M16D1-5TIN 200MHz 400Mbps/pin 66pin TSOPII
T: indicates TSOP II package
C: indicates Commercial temp.
I: indicates Industrial temp.
N: indicates lead free ROHS
Confidential 1 Rev.1.1 July /2011 AS4C32M16D1
Figure 1. Pin Assignment (Top View)
1 66
VDD VSS
DQ0 2 65 DQ15
VDDQ 3 64 VSSQ
DQ1 4 63 DQ14
DQ2 5 62 DQ13
VSSQ 6 61 VDDQ
DQ3 7 60 DQ12
DQ4 8 59 DQ11
VDDQ 9 58 VSSQ
10 57
DQ5 DQ10
11 56
DQ6 DQ9
VSSQ 12 55 VDDQ
DQ7 13 54 DQ8
NC 14 53 NC
VDDQ 15 52 VSSQ
LDQS 16 51 UDQS
NC 17 50 NC
VDD 18 49 VREF
19 48
NC VSS
LDM 20 47 UDM
WE 21 46 CK
CAS 22 45 CK
RAS 23 44 CKE
CS 24 43 NC
NC 25 42 A12
BA0 26 41 A11
BA1 27 40 A9
A10/AP 28 39 A8
29 38
A0 A7
A1 30 37 A6
A2 31 36 A5
A3 32 35 A4
VDD 33 34 VSS
Confidential 2 Rev.1.1 July /2011