8
3
7
1
2
POR
XWRST
RESETSTAT
Boot and Device
Configuration Pins
TMS320C6474
www.ti.com
SPRS552F – OCTOBER 2008 – REVISED JULY 2010
7.7.7
Reset Electrical Data/Timing
Table 7-20. Timing Requirements for Reset
(1) (2)
(see
Figure 7-7
and
Figure 7-8
)
NO.
MIN
MAX
UNIT
1
t
h(SUPPLY-POR)
Hold Time, POR low after supplies stable and input clocks valid
100
m
s
2
t
su(XWRSTH-PORH)
Setup Time, XWRSTx high to POR high
100
m
s
4
t
w(XWRST)
Pulse Duration, XWRST low
24C
ns
7
t
s(BOOT)
Setup time, boot mode and configuration pins valid before POR
12C
ns
or XWRST high
8
t
h(BOOT)
Hold time, bootmode and configuration pins valid after POR or
12C
ns
XWRST high
(1)
If CORECLKSEL = 0, C = 1/SYSCLK(N|P) frequency, in ns.
(2)
If CORECLKSEL = 1, C = 1/ALTCORECLK(N|P) frequency, in ns.
Table 7-21. Switching Characteristics Over Recommended Operating Conditions During Reset
(1)
(see
Figure 7-7
and
Figure 7-8
)
NO.
MIN
MAX
UNIT
3
t
d(PORH-RSTATH)
Delay Time, POR high to RESETSTAT high
21000C
ns
5
t
d(XWRSTH-RSTATH)
Delay Time, XWRST high to RESETSTAT high
35C
ns
(1)
C = 1/CPU frequency, in ns.
Table 7-22. Switching Characteristics Over Recommended Operating Conditions for Warm Reset
(see
Figure 7-9
)
NO.
MIN
MAX
UNIT
9
t
su(PORH-XWRSTL)
Setup time, POR high to XWRST low
1.34
ms
Figure 7-7. Power-On Reset Timing
Copyright © 2008–2010, Texas Instruments Incorporated
Peripheral Information and Electrical Specifications
115
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