Table 4-39 IOFPGA_TSIF2XCLK_DIV Register bit assignments (continued)
Bits
Name
Type
Function
[15:5]
-
-
Reserved.
[4:0]
CLKDIV
RW
Sets clock division value.
Division value=CLK1.
Reset value
0b10011
, division value=20.
Note
The example values in this register, and the clock frequency they generate, are part of a clock
configuration which enables correct operation of the N1 SoC. Further SoC testing and measurement, by
Arm or by other developers, might result in new register values.
4.5.9
SCPNICCLK_CTRL Register
The SCPNICCLK_CTRL Register characteristics are:
Purpose
Selects source for clock
SCPNICCLK
.
Usage constraints
Bits[11:8] are read-only. Bits[3:0] are read/write.
Configurations
Available in all N1 board configurations.
Memory offset and full register reset value
See
4.5.1 Serial Configuration Control registers summary
The following table shows the SCPNICCLK_CTRL Register bit assignments.
Table 4-40 SCPNICCLK_CTRL Register bit assignments
Bits
Name
Type
Function
[31:12] -
-
Reserved.
[11:8]
CLKSEL_CUR
RO
Current value of source for
SCPNICCLK
:
0b0001
: Source is
REFCLK
.
0b0010
: Source is divided
SYSPLLCLK
.
[7:4]
-
-
Reserved.
[3:0]
CLKSEL
RW
Select source for
SCPNICCLK
:
0b0001
: Select
REFCLK
.
0b0010
: Select divided
SYSPLLCLK
.
Reset value
0b0010
.
4 Programmers model
4.5 Serial Configuration Control registers
101489_0000_02_en
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