3.1.25.4 Counter Register; Geographical Address Register; Table 3-30 Tick Timer Compare Registers; Table 3-31 Tick Timer Counter Register - SMART Embedded Computing MVME4100 Programmer's Reference Manual

Register Descriptions
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 3-30 Tick Timer Compare Registers

REG
BIT
Field
OPER
RESET

3.1.25.4 Counter Register

When enabled the tick timer counter register increments every microsecond. software may
read or write the counter at any time.

Table 3-31 Tick Timer Counter Register

REG
BIT
Field
OPER
RESET
3.1.26

Geographical Address Register

The VMEbus Status Register in the Tsi148 provides the VMEbus geographical address of
the MVME4100. This register reflects the inverted states of the geographical address pins
at the 5-row, 160-pin P1 connector. Applications not using the 5-row backplane can use the
planar switch described in the MVME4100 Installation and Use manual to assign a
geographical address.
46
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
MVME4100 Single Board Computer Programmer's Reference (6806800H19D)
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Register Descriptions
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