Renesas M16C/60 Series Hardware Manual page 114

Under development
This document is under development and its contents are subject to change.
M16C/6N5 Group
Timer Ai mode register (i = 0 to 4)
b7 b6 b5 b4 b3 b2
Timer Ai register (i = 0 to 4) (Note 1)
(b15)
b7
Note 1: The register must be accessed in 16-bit unit.
Note 2: The timer counts pulses from an external device or overflows or underflows in other timers.
Note 3: If the TAi register is set to "0000
are not generated either. Furthermore, if "pulse output" is selected, no pulses are output from
the TAi
OUT
Note 4: Use the MOV instruction to write to the TAi register.
Note 5: If the TAi register is set to "0000
on the TAi
The same applies when the 8 high-order bits of the timer TAi register are set to "00
operating as an 8-bit pulse width modulator.
Figure 1.13.4 TA0MR to TA4MR Registers and TA0 to TA4 Registers
Rev.1.00 2003.05.30 page 100
b1 b0
Symbol
TA0MR to TA4MR
Bit symbol
TMOD0
Operation mode select bit
TMOD1
MR0
MR1
MR2
MR3
TCK0
Count source select bit
TCK1
(b8)
b0 b7 b0
Mode
Timer Divide the count source by n + 1 where n =
mode set value
Event
Divide the count source by FFFF
counter
where n = set value when counting up or
mode
by n + 1 when counting down (Note 2)
One-shot Divide the count source by n where n = set
timer mode value and cause the timer to sto p
Modify the pulse width as follows:
Pulse width
PWM period: (2
modulation
High level PWM pulse width: n / fj
mode
(16-bit PWM) where n = set value, fj = count source
frequency
Pulse width
Modify the pulse width as follows:
modulation
PWM period: (2
mode
High level PWM pulse width: (m + 1)n / fj
(8-bit PWM)
where n = high-order address set value,
m = low-order address set value, fj =
count source frequency
", the counter does not work and timer Ai interrupt requests
16
pin.
", the pulse width modulator does not work, the output level
16
pin remains low, and timer Ai interrupt requests are not generated either.
OUT
Address After reset
0396 to 039A
16 16
Bit name
b1 b0
0 0 : Timer mode
0 1 : Event counter mode
1 0 : One-shot timer mode
1 1 : Pulse width modulation
(PWM) mode
Function varies with each
operation mode
Function varies with each
operation mode
Symbol Address
TA0 0387 , 0386
16
TA1 0389 , 0388
16
TA2 038B , 038A
16
TA3 038D , 038C
16
TA4 038F , 038E
16
Function
— n + 1
16
16
— 1) / fj
— 1) ✕ (m + 1)/ fj
8
00
16
Function
After reset
Indeterminate
16
Indeterminate
16
Indeterminate
16
Indeterminate
16
Indeterminate
16
Setting range RW
0000 to FFFF
16 16
RW
0000 to FFFF
16 16
RW
0000 to FFFF
16 16
WO
(Notes 3, 4)
0000 to FFFE
16 16
(Note 4, 5)
WO
00 to FE
16 16
(High-order address)
00 to FF
16 16
(Low-order address)
WO
(Note 4, 5)
" while
16
Timer A
RW
RW
RW
RW
RW
RW
RW
RW
RW