OMAP-L137
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SPRS563G – SEPTEMBER 2008 – REVISED JUNE 2014
6.27.3 HPI Electrical Data/Timing
Table 6-101. Timing Requirements for Host-Port Interface Cycles
(1) (2)
No.
PARAMETER
MIN
MAX
UNIT
1
t
su(SELV-HSTBL)
Setup time, select signals
(3)
valid before UHPI_HSTROBE low
5
ns
2
t
h(HSTBL-SELV)
Hold time, select signals
(3)
valid after UHPI_HSTROBE low
2
ns
3
t
w(HSTBL)
Pulse duration, UHPI_HSTROBE active low
15
ns
4
t
w(HSTBH)
Pulse duration, UHPI_HSTROBE inactive high between consecutive accesses
2M
ns
9
t
su(SELV-HASL)
Setup time, selects signals valid before UHPI_HAS low
5
ns
10
t
h(HASL-SELV)
Hold time, select signals valid after UHPI_HAS low
2
ns
11
t
su(HDV-HSTBH)
Setup time, host data valid before UHPI_HSTROBE high
5
ns
12
t
h(HSTBH-HDV)
Hold time, host data valid after UHPI_HSTROBE high
2
ns
Hold time, UHPI_HSTROBE high after UHPI_HRDY low. UHPI_HSTROBE should
13
t
h(HRDYL-HSTBH)
not be inactivated until UHPI_HRDY is active (low); otherwise, HPI writes will not
2
ns
complete properly.
16
t
su(HASL-HSTBL)
Setup time, UHPI_HAS low before UHPI_HSTROBE low
2
ns
17
t
h(HSTBL-HASH)
Hold time, UHPI_HAS low after UHPI_HSTROBE low
2
ns
(1)
UHPI_HSTROBE refers to the following logical operation on UHPI_HCS, UHPI_HDS1, and UHPI_HDS2: [NOT(UHPI_HDS1 XOR
UHPI_HDS2)] OR UHPI_HCS.
(2)
M=SYSCLK2 period (CPU clock frequency)/2 in ns. For example, when running parts at 300 MHz, use M=6.67 ns.
(3)
Select signals include: UHPI_HCNTL[1:0], UHPI_HRW and UHPI_HHWIL.
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