TMS320VC5420
FIXED-POINT DIGITAL SIGNAL PROCESSOR
SPRS080C – MARCH 1999 – REVISED APRIL 2000
general purpose input output (GPIO) timing
timing requirements for GPIO (see Figure 26)
MIN
MAX
UNIT
Setup time, GPIOx input valid before CLKOUT high, GPIOx configured as
general-purpose input.
t
t
7
ns
su(GPIO-COH)
Hold time, GPIOx input valid after CLKOUT high, GPIOx configured as general-purpose
input.
0
ns
h(GPIO-COH)
switching characteristics for GPIO (see Figure 26)
PARAMETER
MIN
MAX
UNIT
Delay time, CLKOUT high to GPIOx output change. GPIOx configured as
general-purpose output.
t
0
5
ns
d(COH-GPIO)
CLKOUT
t
su(GPIO-COH)
t
h(GPIO-COH)
GPIOx Input Mode
GPIOx Output Mode
t
d(COH-GPIO)
Figure 26. GPIO Timings
57
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