Table 3-33 FCLK_DIV Register bit assignments (continued)
Bits
Name
Function
[15:5]
-
Reserved.
[4:0]
FCLKDIV
Controls FCLKDIV division value in
SSE-200 subsystem:
Division value = 1.
These bits are read/write.
Reset value
0b00000
, no division.
SYSCLK_DIV Register
The SYSCLK_DIV Register characteristics are:
Purpose
Controls the divider value of clock divider SYSCLKDIV that derives
SYSCLK
from
FCLK
in
the Musca
‑
S1 test chip.
SYSCLK
drives the primary processor element, CPU0.
Usage constraints
Bits[20:16] are read-only. Bits[4:0] are read/write. The other bits are reserved.
Memory offset and full register reset value
See
3.5.3 System Control Register Block
The following table shows the bit assignments.
Table 3-34 SYSCLK_DIV Register bit assignments
Bits
Name
Function
[31:21] -
Reserved.
[20:16] SYSCLKDIV_CUR
Current value of SYSCLKDIV:
The division value of SYSCLKDIV divider is
SYSCLK1.
These bits are read-only.
Reset value
0b00011
.
[15:5]
-
Reserved.
[4:0]
SYSCLKDIV
Controls SYSCLKDIV division value in
SSE-200 subsystem:
Division value = SY1.
These bits are read/write.
Reset value
0b00011
.
3.5.4
CMSDK timer
The system control element implements a CMSDK watchdog timer running on the
S32KCLK
clock.
The base memory addresses of the control registers of the CMSDK timer in the system control element
are:
•
0x4002_F000
in the Non
‑
secure region.
•
0x5002_F000
in the Secure region.
3 Programmers model
3.5 System control element
101835_0000_01_en
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