CHAPTER 9 TIMER/COUNTER FUNCTION
373
User’s Manual U15195EJ5V0UD
9.4.5 Control registers
(1) Timer 3 clock selection register (PRM03)
The PRM03 register is used to select the base clock (f
CLK
) of timer 3 (TM3).
This register can be read/written in 8-bit or 1-bit units.
Cautions 1. Always set this register before using the timer.
2.
Set
f
CLK
to 32 MHz or less.
7
0
PRM03
6
0
5
0
4
0
3
0
2
0
1
0
0
PRM3
Address
FFFFF690H
After reset
00H
Bit position
Bit name
Function
0
PRM3
Specifies the base clock (f
CLK
) of timer 3 (TM3).
0: f
XX
/2 (when f
XX
> 32 MHz)
1: f
XX
(when f
XX
≤
32 MHz)
Remark
f
XX
: Internal system clock
