The Hynix HY57V64420HGTP is a 67,108,864-bit CMOS Synchronous DRAM, ideally suited for the main memory applications which
require large memory density and high bandwidth. HY57V64420HGTP is organized as 4banks of 4,194,304x4.
HY57V644020HGTP is offering fully synchronous operation referenced to a positive edge of the clock. All inputs and outputs are syn-
chronized with the rising edge of the clock input. The data paths are internally pipelined to achieve very high bandwidth. All input and out-
put voltage levels are compatible with LVTTL.
Programmable options include the length of pipeline (Read latency of 2 or 3), the number of consecutive read or write cycles initiated by
a single control command (Burst length of 1,2,4,8 or Full page), and the burst count sequence(sequential or interleave). A burst of read
or write cycles in progress can be terminated by a burst terminate command or can be interrupted and replaced by a new burst read or
write command on any cycle. (This pipelined design is not restricted by a `2N` rule.)
FEATURES
•
•
•
Single 3.3±0.3V power supply
All device pins are compatible with LVTTL interface
JEDEC standard 400mil 54pin TSOP-II with 0.8mm of pin
pitch
All inputs and outputs referenced to positive edge of system
clock
Data mask function by DQM
Internal four banks operation
•
•
•
•
•
Auto refresh and self refresh
4096 refresh cycles / 64ms
Programmable Burst Length and Burst Type
- 1, 2, 4, 8 or Full page for Sequential Burst
•
- 1, 2, 4 or 8 for Interleave Burst
Programmable CAS Latency ; 2, 3 Clocks
Lead Free
•
•
ORDERING INFORMATION
Part No.
HY57V64420HGTP-5/55/6/7
HY57V64420HGTP-K
HY57V64420HGTP-H
HY57V64420HGTP-P
HY57V64420HGTP-S
HY57V64420HGLTP-5/55/6/7
HY57V64420HGLTP-K
HY57V64420HGLTP-H
HY57V64420HGLTP-P
HY57V64420HGLTP-S
Clock Frequency
200/183/166/143MHz
133MHz
133MHz
100MHz
100MHz
200/183/166/143MHz
133MHz
133MHz
100MHz
100MHz
Power
Organization
Interface
Package
Normal
4Banks x 4Mbits x4
LVTTL
400mil 54pin TSOP II
Low power
This document is a general product description and is subject to change without notice. Hynix Semiconductor does not assume any responsibility for use of
circuits described. No patent licenses are implied.
Rev. 0.5 / Apr. 2004
1
HY57V64420HGTP
PIN CONFIGURATION
V
DD
NC
V
DDQ
NC
DQ0
V
SSQ
NC
NC
V
DDQ
NC
DQ1
V
SSQ
NC
V
DD
NC
/WE
/CAS
/RAS
/CS
BA0
BA1
A10/AP
A0
A1
A2
A3
V
DD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
V
SS
NC
V
SSQ
NC
DQ3
V
DDQ
NC
NC
V
SSQ
NC
DQ2
V
DDQ
NC
V
SS
NC
DQM
CLK
CKE
NC
A11
A9
A8
A7
A6
A5
A4
V
SS
54pin TSOP II
400mil x 875mil
0.8mm pin pitch
PIN DESCRIPTION
PIN
CLK
CKE
CS
BA0, BA1
A0 ~ A11
Clock
Clock Enable
Chip Select
Bank Address
Address
Row Address Strobe,
Column Address Strobe,
Write Enable
Data Input/Output Mask
Data Input/Output
Power Supply/Ground
Data Output Power/Ground
No Connection
PIN NAME
DESCRIPTION
The system clock input. All other inputs are registered to the SDRAM on the
rising edge of CLK
Controls internal clock signal and when deactivated, the SDRAM will be one
of the states among power down, suspend or self refresh
Enables or disables all inputs except CLK, CKE and DQM
Selects bank to be activated during RAS activity
Selects bank to be read/written during CAS activity
本帖最后由 Jacktang 于 2017-12-22 21:23 编辑
#include "DSP28x_Project.h"
// Configure the period for each timer
#define EPWM1_TIMER_TBPRD 3750 // Period register 系统始终 ......
EtherCAT（Ethernet for Control Automation Technology）是一种基于以太网的开发构架的实时工业现场总线通讯协议，EtherCAT是最快的工业以太网技术之一，同时它提供纳秒级精确同步。相对于设置了相同循环时间的其他总线系统，EtherCAT系统结构通常能减少25%-30%的CPU负载，EtherCAT的出现为系统的实时性能和拓扑的灵活性树立了新的标准。...[详细]
无线连接
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
