參數(shù)資料
型號: LR4500
廠商: LSI Corporation
英文描述: Superscalar Microprocessor(超標(biāo)量微處理器)
中文描述: 超標(biāo)量微處理器(超標(biāo)量微處理器)
文件頁數(shù): 162/172頁
文件大小: 1142K
代理商: LR4500
11-4
Specifications
11.1.5 AC Timing Specifications
Table 11.5
lists the AC timing specifications for the LR4500.
Figure 11.1
(
page 11-5
) shows timing relationships. The specifications are valid in
the temperature range 0–85 C case; VDD 3.3 V,
±
5%. Setup and hold
times, which are relevant only for inputs to the LR4500, are referenced
to the rising edge of the system clock (SCLKp) or the Lbus clock
(LCLKp). The valid maximum times are equivalent to hold time for the
LR4500’s outputs. They are not relevant for the inputs. They are
referenced to the rising edge of SCLKp or LCLKp. For 3-state signals,
valid maximum times include the period from high z to valid and valid to
high z. (The z indicates the 3-state or ‘off’ condition of the signal.)
Table 11.5 LR4500 AC Timing Specifications
Signal Name
Reference
Clock
Input/
Output
(I/O)
Loading
(pF)
Buffer
Type
Input Timing
Output
Timing—
Valid
Maximum
(ns)
Setup
(ns)
Hold
(ns)
MAp[11:0]
MCLKp
O
50
b8rp
6.2
MDp[63:0]
MCLKp
I/O
15
bd2c
1.0
0.5
6.8
MCSn[1:0]
MCLKp
O
30
b6r
5.2
MRASn
MCLKp
O
50
b8rp
5.5
MCASn
MCLKp
O
50
b8rp
5.9
MWEn
MCLKp
O
50
b8rp
6.0
MDQMp[7:0]
MCLKp
O
15
b2
5.0
LCLKp
SCLKp
O
50
b12
3.2
LAp[31:2]
LCLKp
I/O
50
bd4crf
10.0
0.0
9.7
LDp[31:0]
LCLKp
I/O
50
bd4crf
3.5
0.5
12.7
LBEn[3:0]
LCLKp
I/O
50
bd4crf
9.0
0.0
9.8
LRDn
1
LCLKp
I/O
50
bd4crf
9.0
0.0
8.3
LADSn
1
LCLKp
I/O
50
bd4crf
2.0
0.0
8.0
LRDYn
1
LCLKp
I/O
50
bd4crf
2.0
0.5
8.0
LRTYn
1
LCLKp
I
ibuff
2.0
0.5
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