CHAPTER 11 FCAN CONTROLLER
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User’s Manual U14492EJ3V0UD
11.10 Control Registers
(1) FCAN clock selection register (PRM04)
The PRM04 register is used to select the base clock (f
MEM1
).
The clock is selected according to the clock frequency.
This register can be read/written in 8-bit or 1-bit units.
Caution
Set this register before using FCAN.
7
0
PRM04
6
0
5
0
4
0
3
0
2
0
1
PRM5
0
PRM4
Address
FFFFF930H
Initial value
00H
Bit Position
Bit Name
Function
Specifies FCAN base clock (f
MEM1
).
PRM5
PRM4
Input Clock Specification
0
0
f
XX
/4 (when f
XX
> 48 MHz)
0
1
f
XX
/2 (when 16 MHz < f
XX
≤
32 MHz)
1
0
f
XX
/3 (when 32 MHz < f
XX
≤
48 MHz)
1
1
f
XX
(when f
XX
≤
16 MHz)
1, 0
PRM5,
PRM4
Remark
f
XX
: Internal system clock
