Texas Instruments TMS320 2833 Series

Configuring Lead, Active, and Trail Wait States www.ti.com
848
SPRUI07–March 2020
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External Interface (XINTF)
Table 14-4 and Table 14-5 show the relationship between Lead/Active/Trail values and the
XTIMCLK/X2TIMING modes.
(1)
XINTCNF2[XTIMCLK] configures the ratio between SYSCLKOUT and XTIMCLK.
(2)
X2TIMING is configured per zone in the zone specific XTIMING register.
Table 14-4. Relationship Between Lead/Trail Values and the XTIMCLK/X2TIMING
Modes
Lead/Trail
Value
[XTIMCLK]
(1)
X2TIMING
(2)
Lead
SYSCLKOUT Cycles
Trail
SYSCLKOUT Cycles
Formula 0 0 Lead Value * 1 Trail Value * 1
0 1 Lead Value * 2 Trail Value * 2
1 0 Lead Value * 2 Trail Value * 2
1 1 Lead Value * 4 Trail Value * 4
0 X X Not a valid value
(do not use)
0
1 0 0 1 1
0 1 2 2
1 0 2 2
1 1 4 4
2 0 0 2 2
0 1 4 4
1 0 4 4
1 1 8 8
3 0 0 3 3
0 1 6 6
1 0 6 6
1 1 12 12