參數資料
型號: TMX320DM648ZUT900
廠商: Texas Instruments, Inc.
英文描述: Digital Media Processor
中文描述: 數字媒體處理器
文件頁數: 121/166頁
文件大小: 1341K
代理商: TMX320DM648ZUT900
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6.15.3 HPI Electrical Data/Timing
TMS320DM647/TMS320DM648
Digital Media Processor
SPRS372–MAY 2007
Table 6-51. Timing Requirements for Host-Port Interface Cycles
(1)(2)
(see
Table 6-52
through
Figure 6-38
)
-720
-900
NO.
UNIT
MIN
MAX
9
10
11
12
13
14
15
16
17
18
37
t
su(HASL-HSTBL)
t
h(HSTBL-HASL)
t
su(SELV-HASL)
t
h(HASL-SELV)
t
w(HSTBL)
t
w(HSTBH)
t
su(SELV-HSTBL)
t
h(HSTBL-SELV)
t
su(HDV-HSTBH)
t
h(HSTBH-HDV)
t
su(HCSL-HSTBL)
Setup time, HAS low before HSTROBE low
Hold time, HAS low after HSTROBE low
Setup time, select signals
(3)
valid before HAS low
Hold time, select signals
(3)
valid after HAS low
Pulse duration, HSTROBE low
Pulse duration, HSTROBE high between consecutive accesses
Setup time, select signals
(3)
valid before HSTROBE low
Hold time, select signals
(3)
valid after HSTROBE low
Setup time, host data valid before HSTROBE high
Hold time, host data valid after HSTROBE high
Setup time, HCS low before HSTROBE low
Hold time, HSTROBE low after HRDY low. HSTROBE should not be
inactivated until HRDY is active (low); otherwise, HPI writes will not
complete properly.
5
2
5
5
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
2M
2M
5
5
5
1
0
38
t
h(HRDYL-HSTBL)
1.1
ns
(1)
(2)
(3)
HSTROBE refers to the following logical operation on HCS, HDS1, and HDS2: [NOT (HDS1 XOR HDS2)] OR HCS.
M = SYSCLK3 period = 6/CPU clock frequency in ns. For example, when running parts at 1000 MHz, use M = 6 ns.
Select signals include: HCNTL[1:0] and HR/W. For HPI16 mode only, select signals also include HHWIL.
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Peripheral Information and Electrical Specifications
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