參數(shù)資料
型號: YSS944-VZ
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP144
封裝: LEAD FREE, PLASTIC, LQFP-144
文件頁數(shù): 26/36頁
文件大?。?/td> 831K
代理商: YSS944-VZ
YSS944/943/940
32
(d)External memory interface
When EM_CYC = c, EM_WEH = w, and EM_OEH = o, the timing is as described below.
1) Read
No.
Parameter
Symbol Condition
Min.
Typ.
Max.
Unit
1
Read cycle time
tRCYC CL = 20 pF
tASR+tREP+tAHR
ns
2
Address access time
tAA
CL = 20 pF
TCLK×(2c+3)-25
ns
3
nMEMOE access time
tEAC
CL = 20 pF
TCLK×(2c+2)-25
ns
4
Data setup time
tDSR
25
ns
5
Data hold time
tDHR
0
ns
6
Address setup time
tASR
CL = 20 pF
TCLK×1
ns
7
Address hold time
tAHR
CL = 20 pF
TCLK×(2^o+1)
ns
8
nMEMOE pulse width
tREP
CL = 20 pF
TCLK×(2c+2)
ns
MEMA18-0
6
MEMD7-0
1
nMEMCE
nMEMOE
nMEMWE
4
5
Read
Data
7
8
2
3
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