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Register Descriptions
MVME7100ET Single Board Computer Programmer’s Reference (6806800K88B
)
48
3.1.24.3 Compare Register
The tick timer counter is compared to the Compare Register. When they are equal, the tick
timer interrupt is asserted and the overflow counter is incremented. If the clear-on-compare
mode is enabled the counter is also cleared. For periodic interrupts this equation should be
used to calculate the compare register value for a specific period (T):
Compare register value=T (us)
When programming the tick timer for periodic interrupts the counter should be cleared to zero
by software and then enabled. If the counter does not initially start at zero, the time to the first
interrupt may be longer or shorter than expected. Note that the rollover time for the counter
is 71.6 minutes.
3.1.24.4 Counter Register
When enabled the tick timer counter register increments every microsecond. software may
read or write the counter at any time.
Table 3-27 Tick Timer Compare Registers
REG
Tick Timer 1 Compare Register - 0xF202 0014 (32 bits)
Tick Timer 2 Compare Register - 0xF202 0024 (32 bits)
Tick Timer 3 Compare Register - 0xF202 0034 (32 bits)
Tick Timer 4 Compare Register - 0xF202 0044 (32 bits)
BIT
31
…
0
Field
Tick Timer Compare Value
OPER
R/W
RESET
0
Table 3-28 Tick Timer Counter Register
REG
Tick Timer 1 Counter Register - 0xF202 0018 (32 bits)
Tick Timer 2 Counter Register - 0xF202 0028 (32 bits)
Tick Timer 3 Counter Register - 0xF202 0038 (32 bits)
Tick Timer 4 Counter Register - 0xF202 0048 (32 bits)
BIT
31
…
0
Содержание MVME7100ET
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Страница 10: ...MVME7100ET Single Board Computer Programmer s Reference 6806800K88B 10 List of Figures ...
Страница 14: ...MVME7100ET Single Board Computer Programmer s Reference 6806800K88B About this Manual 14 About this Manual ...
Страница 24: ...Memory Maps MVME7100ET Single Board Computer Programmer s Reference 6806800K88B 24 ...
Страница 50: ...Register Descriptions MVME7100ET Single Board Computer Programmer s Reference 6806800K88B 50 ...
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