參數(shù)資料
型號(hào): MC68306PV16
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 16.67 MHz, MICROPROCESSOR, PQFP144
封裝: PLASTIC, TQFP-144
文件頁(yè)數(shù): 86/191頁(yè)
文件大?。?/td> 1311K
代理商: MC68306PV16
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8- 12
MC68306 USER'S MANUAL
MOTOROLA
8.10 BUS OPERATION—DRAM ACCESSES AC TIMING
SPECIFICATIONS (The electrical specifications in this document are preliminary. See Figures 8-8–8-11)
16.67 MHz
0-Wait
1-Wait
Num.
Characteristic
Min
Max
Min
Max
Unit
71
CLKOUT High to RAS≈ Asserted (0 Wait State Operation)
0
30
ns
71A
AS Asserted to RAS≈ Asserted (0 Wait State Operation)
0
10
ns
72
CLKOUT Low to RAS≈ Asserted (1 Wait State Operation)
0
25
ns
73
CLKOUT Low to Row
Address Valid
030
ns
74
Row Address Valid to RAS≈ Asserted
15
30
ns
75
RAS≈ Asserted to Row Address Invalid
20
40
ns
76
CLKOUT High to Row Address Invalid (0 Wait State Operation)
0–––
ns
77
CLKOUT Low to Row Address Invalid (1 Wait State Operation)
––0–
ns
78
RAS≈ Width Asserted (Non-Page Mode)
120
180
150
210
ns
79
RAS≈ Width Asserted (Page Mode)
480
540
510
570
ns
80
RAS≈ Width Negated (Back to Back Cycles)
60
90
ns
81
RAS≈ Asserted to CAS≈ Asserted
45
60
ns
82
CLKOUT High to Column Address
Valid (0 Wait State Operation)
0
30
ns
83
CLKOUT Low to Column Address
Valid (1 Wait State Operation)
0
30
ns
84
CLKOUT Low to CAS≈ Asserted (0 Wait State Operation)
0
20
ns
85
CLKOUT High to CAS≈ Asserted (1 Wait State Operation)
0
20
ns
86
Column Address Valid to CAS≈ Asserted
20
20
ns
87
CAS≈ Asserted to Column Address Invalid
75
100
ns
88
CAS≈ Width Asserted
60
90
120
ns
89
CLKOUT Low to RAS≈ /CAS≈ Negated
0
30
0
30
ns
89A
AS Negated to RAS≈ /CAS≈ Negated
0
10
0
10
ns
90
CAS≈ Width Negated (Back to Back Cycles)
150
180
ns
91
CAS≈ Width Negated (Page Mode2)
240
300
240
300
ns
92
UDS/LDS Asserted to CAS≈ Asserted1 (Page Mode 2)
0
10
0
10
ns
93
DRAMW Low to CAS≈ Asserted (Write)
30
60
ns
94
Data Out Valid to CAS≈ Asserted (Write)
15
45
ns
95
CLKOUT Low to CAS≈ Asserted (Refresh Cycle)
0
20
0
20
ns
96
CLKOUT High to CAS≈ Negated (Refresh Cycle)
0
20
0
20
ns
97
CAS≈ Width Asserted (Refresh Cycle)
80
120
140
180
ns
98
CAS≈ Asserted to RAS≈ Asserted (Refresh Cycle)
20
60
20
60
ns
99
CLKOUT High to RAS≈ Asserted (Refresh Cycle)
0
30
0
30
ns
100
CLKOUT Low to RAS≈ Negated (Refresh Cycle)
0
25
0
25
ns
101
RAS≈ Width Asserted (Refresh Cycle)
80
120
140
180
ns
102
DRAMW High to RAS≈ Asserted (Refresh Cycle)
20
60
20
60
ns
103
DRAMW High Hold After RAS≈ Asserted (Refresh Cycle)
20
20
ns
NOTES:
1. On write portion of TAS, CAS assertion is gated by UDS/LDS (not CLKOUT as in all other operation).
2. Page mode is used on Read-Modify-Write (TAS instruction) cycles only.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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