3.1.24.3 Compare Register; 3.1.24.4 Counter Register; Table 3-27 Tick Timer Compare Registers; Table 3-28 Tick Timer Counter Register - SMART Embedded Computing MVME7100 Programmer's Reference Manual

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.

Table 3-27 Tick Timer Compare Registers

REG
BIT
Field
OPER
RESET

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 3-28 Tick Timer Counter Register

REG
BIT
Field
OPER
RESET
MVME7100 Single Board Computer Programmer's Reference (6806800E82C)
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)
31
Tick Timer Compare Value
R/W
0
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)
31
Tick Timer Counter Value
R/W
0
Register Descriptions
...
... 0
0
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