- 您现在的位置：买卖IC网 > PDF目录377893 > MB8504S064AC-67 (Fujitsu Limited) CMOS 4M×64 Bit Synchronous Dynamic Random Access Memory (SDRAM)(CMOS 4M×64位同步动态RAM) PDF资料下载
参数资料
| 型号： | MB8504S064AC-67 |
| 厂商： | Fujitsu Limited |
| 英文描述： | CMOS 4M×64 Bit Synchronous Dynamic Random Access Memory (SDRAM)(CMOS 4M×64位同步动态RAM) |
| 中文描述： | 的CMOS 4米× 64位同步动态随机存取存储器（SDRAM）的CMOS（4分× 64位同步动态RAM）的 |
| 文件页数： | 16/20页 |
| 文件大小： | 404K |
| 代理商： | MB8504S064AC-67 |
16
MB8504S064AC-100/-84/-67
3. READ OPERATIONS
CURRENT ADDRESS READ
Internally the SPD contains an address counter that maintains the address of the last data accessed,
incremented by one. Therefore, if the last access (either a read or write operation) was to address(n), the next
read operation would access data from address(n+1). Upon receipt of the slave address with the R/W bit = “1”,
the SPD issues an acknowledge and transmits the eight bits of data during the next eight clock cycles. The
master terminates this transmission by issuing a stop condition, omitting the ninth clock cycle acknowledge.
Refer to Fig.3 for the sequence of address, acknowledge and data transfer.
RANDOM READ
Random Read operations allow the master to access any memory location in a random manner. Prior to issuing
the slave address with the R/W bit = “1”, the master must first perform a “dummy” write operation on the SPD.
The master issues the start condition, and the slave address followed by the word address. After the word
address acknowledge, the master immediately reissues the start condition and the slave address with the R/
W bit = “1”. This will be followed by an acknowledge from the SPD and then by the eight bits of data. The
master terminates this transmission by issuing a stop condition, omitting the ninth clock cycle acknowledge.
Refer to Fig.4 for the sequence of address, acknowledge and data transfer.
Fig.3 – CURRENT ADDRESS READ
S
T
O
P
DATA
A
C
K
SLAVE
ADDRESS
S
T
A
R
T
BUS ACTIVITY :
MASTER
SDA LINE
BUS ACTIVITY :
SPD
Fig.4 – RANDOM READ
S
T
O
P
DATA
A
C
K
SLAVE
ADDRESS
A
C
K
A
C
K
SLAVE
ADDRESS
WORD
ADDRESS
S
T
A
R
T
S
T
A
R
T
BUS ACTIVITY :
MASTER
SDA LINE
BUS ACTIVITY :
SPD
相关PDF资料 |
PDF描述 |
|---|---|
| MB8504S064AF-100 | CMOS 4M×64Bit Synchronous Dynamic Random Access Memory (SDRAM)(CMOS 4M×64位 同步动态RAM) |
| MB8504S064AF-67 | CMOS 4M×64Bit Synchronous Dynamic Random Access Memory (SDRAM)(CMOS 4M×64位 同步动态RAM) |
| MB8504S064AF-84 | CMOS 4M×64Bit Synchronous Dynamic Random Access Memory (SDRAM)(CMOS 4M×64位 同步动态RAM) |
| MB8504S072AC-100 | CMOS 4M×72Bit Synchronous Dynamic Random Access Memory (SDRAM)(CMOS 4M×72位 同步动态RAM) |
| MB8504S072AC-67 | CMOS 4M×72Bit Synchronous Dynamic Random Access Memory (SDRAM)(CMOS 4M×72位 同步动态RAM) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MB8508S064CE-100 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8 M x 64 BIT SYNCHRONOUS DYNAMIC RAM SO-DIMM |
| MB85101BAN | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:HIGH FREQUENCY CERAMIC CAPACITORS |
| MB85101BBN | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:HIGH FREQUENCY CERAMIC CAPACITORS |
| MB85101CAN | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:HIGH FREQUENCY CERAMIC CAPACITORS |
| MB85101CBN | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:HIGH FREQUENCY CERAMIC CAPACITORS |
发布紧急采购，3分钟左右您将得到回复。