參數(shù)資料
型號(hào): μPD4516421A
廠商: NEC Corp.
英文描述: 16M-bit Synchronous DRAM(16M 同步動(dòng)態(tài)RAM)
中文描述: 1,600位同步DRAM(1,600同步動(dòng)態(tài)RAM)的
文件頁(yè)數(shù): 8/86頁(yè)
文件大小: 904K
代理商: ΜPD4516421A
μ
PD4516421A, 4516821A, 4516161A for Rev. P
8
CONTENTS
1.
Input/Output Pin Function
... 10
2.
Commands
... 11
3.
Simplified State Diagram
... 14
4.
Truth Table
... 15
4.1
Command Truth Table ... 15
4.2
DQM Truth Table ... 15
4.3
CKE Truth Table ... 15
4.4
Operative Command Table ... 16
4.5
Command Truth Table for CKE ... 19
4.6
Command Truth Table for Two Banks Operation ... 20
5.
Initialization
... 21
6.
Programming the Mode Register
... 22
7.
Mode Register
... 23
7.1
Burst Length and Sequence ... 24
8.
Address Bits of Bank-Select and Precharge
... 25
9.
Precharge
... 26
10. Auto Precharge
... 27
10.1
Read with Auto Precharge ... 27
10.2
Write with Auto Precharge ... 28
11. Read/Write Command Interval
... 29
11.1
Read to Read Command Interval ... 29
11.2
Write to Write Command Interval ... 29
11.3
Write to Read Command Interval ... 30
11.4
Read to Write Command Interval ... 31
12. Burst Termination
... 32
12.1
Burst Stop Command ... 32
12.2
Precharge Termination ... 33
12.2.1
12.2.2
Precharge Termination in READ cycle ... 33
Precharge Termination in WRITE cycle ... 34
13. Electrical Specifications
... 35
13.1
AC Parameters for Write Timing ... 41
13.2
AC Parameters for Read Timing ... 42
13.3
Relationship between Frequency and Latency ... 43
13.4
Mode Register Write ... 44
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