參數(shù)資料
型號: UPD70741GC-25-8EU
廠商: NEC Corp.
元件分類: 16位微控制器
英文描述: V821TM 32-/16-BIT MICROPROCESSOR
中文描述: V821TM 32-/16-BIT微處理器
文件頁數(shù): 78/112頁
文件大?。?/td> 605K
代理商: UPD70741GC-25-8EU
μ
PD70741
78
(b) Write timing (normal access: off-page) (1/2)
Parameter
Symbol
Conditions
MIN.
MAX.
Unit
Read/write cycle time
56
t
RC
(w + 4)T - 10
ns
RAS precharge time
64
t
RP
1.5T - 10
ns
RAS pulse width
65
t
RAS
(w + 2.5)T - 20
ns
RAS column address delay
66
t
RAD
0.5T - 3
0.5T + 7
ns
CAS hold width
69
t
CSH
(w + 2)T - 15
ns
RAS-CAS precharge time
71
t
CRP
1.5T
ns
Row address setup time
73
t
ASR
0.5T - 15
ns
Row address hold time
74
t
RAH
0.5T - 7
ns
Column address read time relative to RAS
77
t
RAL
(w + 1.5)T
ns
RAS hold width (write)
80
t
RSH
1.5T - 20
ns
CAS pulse width (write)
81
t
CAS
1T - 15
ns
RAS-CAS delay (write)
82
t
RCD
(w + 1)T - 15
ns
Column address setup time (write)
83
t
ASC
(w + 0.5)T - 15
ns
Column address hold time (write)
84
t
CAH
1T - 15
ns
Write command hold time
85
t
WCH
0.5T - 10
ns
Write command read time relative to RAS
86
t
RWL
1.5T
ns
Write command read time relative to CAS
87
t
CWL
1T
ns
Data setup time (relative to CAS
)
88
t
DS
0.5T - 15
ns
Data hold time (relative to CAS
)
89
t
DH
1T - 20
1T + 10
ns
Write command setup time
90
t
WCS
0.5T - 15
ns
Remark
T : t
CYK
w: Wait state count - 2
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