參數(shù)資料
型號: TMX320VC5509AGHH
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號處理
英文描述: TMS320VC5509A Fixed-Point Digital Signal Processor
中文描述: TMS320VC5509A定點(diǎn)數(shù)字信號處理器
文件頁數(shù): 93/144頁
文件大?。?/td> 1603K
代理商: TMX320VC5509AGHH
Electrical Specifications
93
November 2002 Revised January 2005
SPRS205D
5.7
Memory Interface Timings
5.7.1 Asynchronous Memory Timings
Table 57 and Table 58 assume testing over recommended operating conditions (see Figure 56 and
Figure 57).
Table 57. Asynchronous Memory Cycle Timing Requirements
NO.
CV
DD
= 1.2 V
CV
DD
= 1.35 V
MIN
CV
DD
= 1.6 V
UNIT
MAX
MIN
MAX
M1
t
su(DV-COH)
t
h(COH-DV)
t
su(ARDY-COH)
t
h(COH-ARDY)
Setup time, read data valid before CLKOUT high
6
5
ns
M2
Hold time, read data valid after CLKOUT high
Setup time, ARDY valid before CLKOUT high
0
0
ns
M3
10
7
ns
M4
Hold time, ARDY valid after CLKOUT high
0
0
ns
To ensure data setup time, simply program the strobe width wide enough. ARDY is internally synchronized. If ARDY does meet setup or hold
time, it may be recognized in the current cycle or the next cycle. Thus, ARDY can be an asynchronous input.
Table 58. Asynchronous Memory Cycle Switching Characteristics
NO.
PARAMETER
CV
DD
= 1.2 V
CV
DD
= 1.35 V
MIN
CV
DD
= 1.6 V
UNIT
MAX
MIN
MAX
M5
t
d(COH-CEV)
t
d(COH-CEIV)
t
d(COH-BEV)
t
d(COH-BEIV)
t
d(COH-AV)
t
d(COH-AIV)
t
d(COH-AOEV)
t
d(COH-AOEIV)
t
d(COH-AREV)
t
d(COH-AREIV)
t
d(COH-DV)
t
d(COH-DIV)
t
d(COH-AWEV)
t
d(COH-AWEIV)
Delay time, CLKOUT high to CEx valid
2
4
2
4
ns
M6
Delay time, CLKOUT high to CEx invalid
2
4
2
4
ns
M7
Delay time, CLKOUT high to BEx valid
4
4
ns
M8
Delay time, CLKOUT high to BEx invalid
2
2
ns
M9
Delay time, CLKOUT high to address valid
4
4
ns
M10
Delay time, CLKOUT high to address invalid
2
2
ns
M11
Delay time, CLKOUT high to AOE valid
2
4
2
4
ns
M12
Delay time, CLKOUT high to AOE invalid
2
4
2
4
ns
M13
Delay time, CLKOUT high to ARE valid
2
4
2
4
ns
M14
Delay time, CLKOUT high to ARE invalid
2
4
2
4
ns
M15
Delay time, CLKOUT high to data valid
4
4
ns
M16
Delay time, CLKOUT high to data invalid
2
2
ns
M17
Delay time, CLKOUT high to AWE valid
2
4
2
4
ns
M18
Delay time, CLKOUT high to AWE invalid
2
4
2
4
ns
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