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CHAPTER 9 TIMER/COUNTER FUNCTION (REAL-TIME PULSE UNIT)
9.1.4 Control registers
(1) Timer 0 clock selection register (PRM01)
The PRM01 register is used to select the base clock (f
It can be read/written in 8-bit or 1-bit units.
Caution Always set this register before using the timer.
7
6
PRM01
0
0
Bit Position
Bit Name
0
PRM1
Remarks 1. f
: Internal system clock
XX
2. f
: Base clock
CLK
234
5
4
3
0
0
0
Specifies the base clock (f
CLK
0: f
/2 (When f
> 40 MHz)
XX
XX
≤ 40 MHz)
1: f
(When f
XX
XX
Remark f
: Internal system clock
XX
Figure 9-3. Timer 00 and Timer 01 Clock
f
XX
f
CLK
f
/2
XX
PRM1
User's Manual U14492EJ3V0UD
) of timer 0 (TM0n).
CLK
2
1
0
0
0
PRM1
Function
) of timer 0 (TM0n) (See Figure 9-3).
Timer 00
Timer 01
Address
Initial value
FFFFF5D0H
00H
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