TMS320C6474
SPRS552F – OCTOBER 2008 – REVISED JULY 2010
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7.12.3 McBSP Electrical Data/Timing
Table 7-44. Timing Requirements for McBSP
(1)
(see
Figure 7-28
)
NO.
MIN
MAX
UNIT
2
t
c(CKRX)
Cycle time, CLKR/X
CLKR/X ext
10P
(2)
ns
3
t
w(CKRX)
Pulse duration, CLKR/X high or CLKR/X low
CLKR/X ext
0.5t
c(CKRX)
-1
(2)
ns
5
t
su(FRH-CKRL)
Setup time, external FSR high before CLKR low
CLKR int
9
ns
CLKR ext
1.3
6
t
h(CKRL-FRH)
Hold time, external FSR high after CLKR low
CLKR int
6
ns
CLKR ext
3
7
t
su(DRV-CKRL)
Setup time, DR valid before CLKR low
CLKR int
8
ns
CLKR ext
0.9
8
t
h(CKRL-DRV)
Hold time, DR valid after CLKR low
CLKR int
3
ns
CLKR ext
3.1
10
t
su(FXH-CKXL)
Setup time, external FSX high before CLKX low
CLKR int
9
ns
CLKR ext
1.3
11
t
h(CKXL-FXH)
Hold time, external FSX high after CLKX low
CLKR int
6
ns
CLKR ext
3
(1)
P = 1/CPU Clock in ns.
(2)
This parameter applies to the maximum McBSP frequency. Operate serial clocks (CLKR/X) in the reasonable range of 40/60 duty
cycles.
142
Peripheral Information and Electrical Specifications
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