- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄379205 > IBM13T4644MPE (IBM Microeletronics) 4M x 64 PC100 SDRAM SO DIMM（Small Outline Dual In-line Memory Module）(4M x 64 PC100小外形雙列直插式同步動態(tài)RAM模塊) PDF資料下載
參數(shù)資料
| 型號： | IBM13T4644MPE |
| 廠商： | IBM Microeletronics |
| 英文描述： | 4M x 64 PC100 SDRAM SO DIMM（Small Outline Dual In-line Memory Module）(4M x 64 PC100小外形雙列直插式同步動態(tài)RAM模塊) |
| 中文描述： | 4米× 64蘇PC100的SDRAM的內存（小外型雙線內存模組）（4米× 64 PC100的小外形雙列直插式同步動態(tài)內存模塊） |
| 文件頁數(shù)： | 5/17頁 |
| 文件大?。?/td> | 269K |
| 代理商： | IBM13T4644MPE |
IBM13T4644MPE
4M x 64 PC100 SDRAM SO DIMM
45L7084.E93888B
10/99
IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
Page 5 of 17
Input/Output Functional Description
Symbol
Type
Signal
Polarity
Function
CK0
Input
Pulse
Positive
Edge
The system clock input. All of the SDRAM inputs are sampled on the rising edge of their
associated clock.
CKE0
Input
Level
Active High
Activates the CK0 signal when high and deactivates it when low.
By deactivating the clock, CKE0 low initiates the Power Down mode, Suspend mode, or
the Self Refresh mode.
S0
Input
Pulse
Active Low
Enables the associated SDRAM command decoder when low and disables the command
decoder when high. When the command decoder is disabled, new commands are
ignored but previous operations continue.
RAS, CAS
WE
Input
Pulse
Active Lowoperation to be executed by the SDRAM.
BA0
Input
Level
—
Selects which SDRAM bank is to be active.
A0-A9,A11,
A10/AP
Input
Level
—
During a Bank Activate command cycle, A0-A11 defines the row address (RA0-RA11)
when sampled at the rising clock edge.
During a Read or Write command cycle, A0-A7 defines the column address (CA0-CA8)
when sampled at the rising clock edge. In addition to the column address, AP is used to
invoke autoprecharge operation at the end of the burst read or write cycle. If AP is high,
autoprecharge is selected and BA0 defines the bank to be precharged (low=bank A,
high=bank B). If AP is low, autoprecharge is disabled.
During a Precharge command cycle, AP is used in conjunction with BA0 to control which
bank(s) to precharge. If AP is high, both bank A and bank B will be precharged regard-
less of the state of BA0. If AP is low, then BA0 is used to define which bank to precharge.
DQ0 - DQ63
Input
Output
Level
—
Data Input/Output pins operate in the same manner as on conventional DRAMs.
DQMB0 -
DQMB7
Input
Pulse
Active High
The Data Input/Output mask places the DQ buffers in a high impedance state when sam-
pled high. In Read mode, DQM has a latency of two clock cycles and controls the output
buffers like an output enable. In Write mode, DQM has a latency of zero and operates as
a byte mask by allowing input data to be written if it is low but blocks the write operation if
DQM is high.
SDA
Input
Output
Level
—
Serial Data. Bidirectional signal used to transfer data into and out of the Serial Presence
Detect EEPROM. Since the SDA signal is Open Drain/Open Collector at the EEPROM, a
pull-up resistor is required on the system board.
SCL
Input
Pulse
—
Serial Clock. Used to clock all Serial Presence Detect data into and out of the EEPROM.
Since the SCL signal is inactive in the “high” state, a pull-up resistor is recommended on
the system board.
V
DD
, V
SS
Supply
Power and ground for the module.
Discontinued (4/1/00 last order; 7/31/00 - last ship)
相關PDF資料 |
PDF描述 |
|---|---|
| IBM13T8644HPB | 8M x 64 SDRAM SO DIMM（Small Outline Dual In-line Memory Modules）(8M x 64 144腳小外形雙列直插同步動態(tài)RAM模塊) |
| IBM13T8644HPC | 8M x 64 SDRAM SO DIMM（Small Outline Dual In-line Memory Modules）(8M x 64 144腳小外形雙列直插同步動態(tài)RAM模塊) |
| IBM13T8644HPD | One Bank 8M x 64 SDRAM SO DIMM（Small Outline Dual In-line Memory Module）(1組 8M x 64 PC100小外形雙列直插同步動態(tài)RAM模塊) |
| IBM13T8644HPE | One Bank 8M x 64 SDRAM SO DIMM（Small Outline Dual In-line Memory Module）(1組 8M x 64 PC100小外形雙列直插式同步動態(tài)RAM模塊) |
| IBM13T8644MPD | Two Bank 8M x 64 SDRAM SO DIMM（Small Outline Dual In-line Memory Module）(2組 8M x 64 PC100小外形雙列直插同步動態(tài)RAM模塊) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| IBM14H5481 | 制造商:AVED Memory Products 功能描述: |
| IBM14H5540 | 制造商:AVED MEMORY PRODUCTS 功能描述: 制造商:AVED Memory Products 功能描述: |
| IBM17R8251 | 制造商:AVED Memory Products 功能描述: |
| IBM17R8252 | 制造商:AVED Memory Products 功能描述: |
| IBM1805T | 制造商:Schneider Electric 功能描述:IBM1805T |
發(fā)布緊急采購，3分鐘左右您將得到回復。