參數(shù)資料
型號(hào): LH79533
英文描述: ARM RISC CORE ASSPs ARM7TDMI
中文描述: ARM的RISC核心專用標(biāo)準(zhǔn)的ARM7TDMI
文件頁數(shù): 24/39頁
文件大?。?/td> 296K
代理商: LH79533
LH79520
System-on-Chip
24
8/21/02
Preliminary Data Sheet
Table 6. AC Signal Characteristics
SIGNAL
TYPE LOAD DRIVE
SYMBOL
MIN.
MAX.
DESCRIPTION
ASYNCHRONOUS MEMORY INTERFACE SIGNALS
D[31:0]
Output 50 pF
8 mA
tOVD
tHCLK + 6 ns
Data Output Valid, following
Address Valid
Data Output Invalid, following
Address Valid
tOHD
3 × tHCLK - 6 ns
Input
tIDD
2 × tHCLK - 18 nsAddress Valid
Chip Select Output Valid,
following Address Valid;
read cycle
Chip Select Output Valid,
following Address Valid;
write cycle
Chip Select Output Invalid,
following Address Valid
Byte Lane Enable Valid,
following Address Valid
Byte Lane Enable Invalid,
following Address Valid
Write Enable Valid, following
Address Valid
Write Enable Invalid, following
Address Valid
Ouput Enable Valid, following
Address Valid
Ouput Enable Invalid, following
Address Valid
2 × tHCLK - 18 nsAddress Valid
nCS6 - nCS0 Output 30 pF
8 mA
tOVCS
6 ns
tOHCSW
tHCLK + 10 ns
tOHCSR
3 × tHCLK - 6 ns
nBLE[3:0]
Output 30 pF
8 mA
tOVBE
tHCLK + 10 ns
tOHBE
2 × tHCLK - 6 ns
nWE
Output 30 pF
8 mA
tOVWE
tHCLK + 10 ns
tOHWE
2 × tHCLK - 6 ns
nOE
Output 30 pF
8 mA
tOVOE
10 ns
tOHOE
3 × tHCLK - 6 ns
nWAIT
Input
tISWAIT
SYNCHRONOUS MEMORY INTERFACE SIGNALS
8 mA
tOVA
tOVD
tOHD
tISD
tIDD
1.5 ns
tOVCA
tOHCA
tOVRA
tOHRA
tOVSDW
tOHSDW
tOVC0
tOHC0
tOVDQ
tOHDQ
tOVSC
tOHSC
8 mA
tSDCLK
19.37 ns
A[25:0]
Ouput
50 pF
10.5ns
11 ns
Address Valid
Output Data Valid
Output Data Hold
Input Data Setup
Input Data Hold
CAS Valid
CAS Hold
RAS Valid
RAS Hold
SDWE Write Enable Valid
SDWE Write Enable Hold
SDCKE Clock Enable Valid
SDCKE Clock Enable Hold
DQM Data Mask Valid
DQM Data Mask Hold
SDCS Data Mask Valid
SDCS Data Mask Hold
SDRAM Clock Period
D[31:0]
Output 50 pF
8 mA
2 ns
5 ns
Input
nCAS
Output 50 pF
8 mA
10.5 ns
2 ns
nRAS
Output 50 pF
8 mA
10.5 ns
2 ns
nSDWE
Output 30 pF
8 mA
10.5 ns
2 ns
SDCKE
Output 30 pF
8 mA
10.5 ns
2 ns
DQM[3:0]
Output 30 pF
8 mA
10.5 ns
2 ns
nSDCS[1:0]
Output 30 pF
8 mA
10.5 ns
2 ns
SDCLK
Output 30 pF
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