Table 4-135 SYS_FAN_SPEED Register bit assignments
Bits
Name
Type
Function
[31]
UPDATE_FAN_SPEED
RW
Set this bit to
0b1
when updating the fan
speed control bits [4:0].
The system clears this bit to
0b0
after
updating the fan speed.
The default value is
0b0
.
[30:5]
-
-
Reserved.
[4:0]
FAN_SPEED
RW
Indicates and controls the speed of the board
cooling fan. The fan has 30 speed settings:
0b00010
: Minimum fan speed.
0b11111
: Maximum fan speed.
Note
0b00000
and
0b00001
are invalid settings.
Do not use them.
4.6.13
SP810_CTRL Register
The SP810_CTRL Register characteristics are:
Purpose
This register in the SP810 system controller selects the source clocks for the four SP804 timers
in the IOFPGA.
Usage constraints
There are no usage constraints.
Configurations
Available in all N1 board configurations.
Memory offset and full register reset value
See
4.6.1 APB system register summary
The following table shows the bit assignments.
Table 4-136 SP810_CTRL Register bit assignments
Bits
Name
Type
Function
[31:22] -
Reserved.
[21]
TimerEn3Sel
Selects the source clock for SP804 3 timer
clock
TIM_CLK[3]
:
0b0
TIM_CLK[3]
=
32kHz
.
0b1
TIM_CLK[3]
=
1MHz
.
Note
The default is
0b0
.
4 Programmers model
4.6 APB system registers
101489_0000_02_en
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