System Integration Unit (SIU)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
Freescale Semiconductor
6-37
Preliminary
6.3.2.24
Compare B Low Register (SIU_CMPBL)
The SIU_CMPBL register holds the 32-bit value that is compared against the value in the SIU_CMPAL
register. The CMPBL field is read/write and reset by the asynchronous reset signal.
6.3.2.25
System Clock Register (SIU_SYSCLK)
The SIU_SYSCLK register controls the source for the system clock, the divider for the system clock, and
eight fields that control the clock divider for groups of peripherals. For a listing of which peripherals are
associated with which LPCLKDIV bit on MPC5510, see
Section 3.4.5, “Peripheral Clock Dividers
Offset:
SI 0x0994
Access: User read-only
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
CMPBL
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
CMPBL
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 6-27. Compare B Low Register (SIU_CMPBL)
Offset:
SI 0x09A0
Access: User read-only
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
SYSCLKSEL SYSCLKDIV
SWT
CLKSEL
0
0
0
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
LPCLKDIV7
LPCLKDIV6
LPCLKDIV5
LPCLKDIV4 LPCLKDIV3 LPCLKDIV2 LPCLKDIV1 LPCLKDIV0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 6-28. System Clock Register (SIU_SYSCLK)