Table 4-17 SYS_FAN_SPEED Register bit assignments
Bits
Name
Function
[31]
UPDATE_FAN_SPEED
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. If you write to this register,
you must write all zeros to these bits. If
you read this register, you must ignore
these bits.
[4:0]
FAN_SPEED
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.
Related concepts
4.3.1 APB system register summary
4.3.15
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 V2M-Juno r2 motherboard configurations.
The following figure shows the bit assignments.
31
0
Reserved
Reserved
22
TimerEn3Sel
21 20 19 18 17 16 15 14
Reserved
TimerEn2Sel
Reserved
TimerEn1Sel
Reserved
TimerEn0Sel
Figure 4-16 SP810_CTRL Register bit assignments
The following table shows the bit assignments.
4 Programmers Model
4.3 APB system registers
ARM 100114_0200_03_en
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