參數(shù)資料
型號(hào): UPD45128841G5-A80
廠商: NEC Corp.
英文描述: 128M-bit Synchronous DRAM 4-bank, LVTTL
中文描述: 128兆位同步DRAM 4銀行,LVTTL
文件頁(yè)數(shù): 12/92頁(yè)
文件大?。?/td> 1107K
代理商: UPD45128841G5-A80
Data Sheet M12650EJBV0DS00
12
μ
PD45128441, 45128841, 45128163
Write command
(/CS, /CAS, /WE = Low, /RAS = High)
If the mode register is in the burst write mode, this command sets the
burst start address given by the column address to begin the burst
write operation. The first write data in burst mode can input with this
command with subsequent data on following clocks.
Fig.4
Column address and write command
/WE
/CAS
/RAS
/CS
CKE
CLK
H
Add
A10
BA0(A13), BA1(A12)
Col.
Read command
(/CS, /CAS = Low, /RAS, /WE = High)
Read data is available after /CAS latency requirements have been
met. This command sets the burst start address given by the column
address.
Fig.5
Column address and read command
/WE
/CAS
/RAS
/CS
CKE
CLK
H
Add
A10
BA0(A13), BA1(A12)
Col.
CBR (auto) refresh command
(/CS, /RAS, /CAS = Low, /WE, CKE = High)
This command is a request to begin the CBR (auto) refresh
operation. The refresh address is generated internally.
Before executing CBR (auto) refresh, all banks must be precharged.
After this cycle, all banks will be in the idle (precharged) state and
ready for a row activate command.
During t
RC
period (from refresh command to refresh or activate
command), the
μ
PD45128xxx cannot accept any other command.
Fig.6
CBR (auto) refresh command
Add
A10
BA0(A13), BA1(A12)
/WE
/CAS
/RAS
/CS
CKE
CLK
H
相關(guān)PDF資料
PDF描述
UPD45128841G5-A80-9JF 128M-bit Synchronous DRAM 4-bank, LVTTL
UPD45128163G5-A10B 128M-bit Synchronous DRAM 4-bank, LVTTL
UPD45128163G5-A10B-9JF 128M-bit Synchronous DRAM 4-bank, LVTTL
UPD45128163G5-A75 128M-bit Synchronous DRAM 4-bank, LVTTL
UPD45128163G5-A75-9JF 128M-bit Synchronous DRAM 4-bank, LVTTL
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