32-Bit Counter; External Register Set - Motorola MVME5100 Programmer's Reference Manual

System Memory Controller (SMC)

32-Bit Counter

Address
Bit
3
Name
Operation
Reset

External Register Set

Address
Bit
Name
Operation
Reset
EXTERNAL REGISTER SET The EXTERNAL REGISTER SET is user provided and
3-72
CTR32 CTR32 is a 32-bit, free-running counter that increments
once per microsecond if the CLK_FREQUENCY register
has been programmed properly. Notice that CTR32 is
cleared by power-up and local reset.
Note
When the system clock is a fractional frequency, such as
66.67 MHz, CTR32 will count at a fractional amount faster or
slower than 1 MHz, depending on the programming of the
CLK_FREQUENCY Register.
EXTERNAL REGISTER SET
is external to the Hawk. It is enabled only when the
tben_en bit is cleared. When the tben_en bit is set, the
EXTERNAL REGISTER SET is disabled and the Hawk
does not respond in its range except for the tben register at
$FEF88300.
The tben register (which is internal to Hawk) responds
only when tben_en is set.
$FEF80100
CTR32
READ/WRITE
0 PL
$FEF88000 - $FEF8FFF8
READ/WRITE
X PL
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