3-56 Computer Group Literature Center Web Site
Falcon ECC Memory Controller Chip Set
3
32-Bit Counter
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. It
does not exist in Revision 1 of Falcon.
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.
Power-Up Reset Status Register 1
PR_STAT1 (power-up reset status) reflects the value that was on the
RD0-RD31 signal pins at power-up reset. This register is read-only.
Note For descriptions of how this register is used in the PowerPC
series boards, refer to the Falcon-Controlled System Registers on
page 1-16, especially the System Configuration Register (SYSCR)
on page 1-17 and the Memory Configuration Register (MEMCR)
on page 1-18.
Address
$FEF80100
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Name
CTR32
Operation
READ/WRITE
Reset
0 PL
Address
$FEF80400
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Name
PR_STAT1
Operation
READ
Reset
V P
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