參數(shù)資料
型號: μPD4811650
廠商: NEC Corp.
英文描述: 16M Synchronous Graphics Memory (SGRAM)(16M同步圖形存儲器)
中文描述: 1,600同步圖形存儲器(SGRAM)(1,600同步圖形存儲器)
文件頁數(shù): 1/96頁
文件大小: 1517K
代理商: ΜPD4811650
The information in this document is subject to change without notice.
1998
MOS INTEGRATED CIRCUIT
μ
PD4811650 for Rev.E
16 M-BIT SYNCHRONOUS GRAM
256K-WORD BY 32-BIT BY 2-BANK
PRELIMINARY DATA SHEET
Document No. M13616EJ2V0DS00 (1st edition)
Date Published August 1998 NS CP (K)
Printed in Japan
The mark
shows major revised points.
Description
The
μ
PD4811650 is a synchronous graphics memory (SGRAM) organized as 262,144 words
×
32 bits
×
2 banks
random access port.
This device can operate up to 143 MHz by using synchronous interface. Also, it has 8-column Block Write function
to improve capability in graphics system.
This product is packaged in 100-pin plastic TQFP (14
×
20 mm).
Features
262,144 words
×
32 bits
×
2 banks memory
Synchronous interface (Fully synchronous DRAM with all input signals are latched at rising edge of clock)
: Pulsed interface
: Automatic precharge and controlled precharge commands
: Ping-pong operation between the two internal memory banks
: Up to 143 MHz operation frequency
Possible to assert random column address in every cycle
Dual internal banks controlled by A10 (Bank Address: BA)
Byte control using DQM0 to DQM3 signals both in read and write cycle
8-column Block Write (BW) function
Persistent write per bit (WPB) function
Wrap sequence : Sequential / Interleave
Programmable burst length (1, 2, 4, 8 and full page)
Programmable /CAS latency (-A70R: 3, -A80, -A10, -A12: 2 and 3)
Power Down operation and Clock Suspend operation
Auto refresh (CBR refresh) or self refresh capability
Single 3.3 V
±
0.3 V power supply
LVTTL compatible inputs and outputs
100-pin Plastic TQFP (14
×
20 mm)
2,048 refresh cycles/32 ms
Burst termination by Precharge command
Burst termination by Burst stop command
Ordering Information
Part number
Cycle time
ns (MIN.)
Clock frequency
MHz (MAX.)
Package
μ
PD4811650GF-A70R-9BT
7
143
100-pin Plastic TQFP (14
×
20 mm)
μ
PD4811650GF-A80-9BT
8
125
μ
PD4811650GF-A10-9BT
10
100
μ
PD4811650GF-A12-9BT
12
83
#
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