Renesas M16C/6NK Hardware Manual page 134

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M16C/6N Group (M16C/6NK, M16C/6NM)
Timer Ai Mode Register (i = 0 to 4)
b7 b6 b5 b4 b3 b2
Timer Ai Register (i = 0 to 4)
(b15)
b7
NOTES:
1.The register must be accessed in 16-bit unit.
2.The timer counts pulses from an external device or overflows or underflows in other timers.
3.If the TAi register is set to "0000h", the counter does not work and timer Ai interrupt requests are
not generated either. Furthermore, if "pulse output" is selected, no pulses are output from the
TAiOUT pin.
4.Use the MOV instruction to write to the TAi register.
5.If the TAi register is set to "0000h", the pulse width modulator does not work, the output level on
the TAiOUT pin remains low, and timer Ai interrupt requests are not generated either.
The same applies when the 8 high-order bits in the TAi register are set to "00h" while operating as
an 8-bit pulse width modulator.
Figure 13.4 TA0MR to TA4MR Registers and TA0 to TA4 Registers
Rev.2.00 Nov 28, 2005
REJ09B0124-0200
b1 b0
Symbol
TA0MR to TA4MR
Bit Symbol
TMOD0
Operation Mode Select Bit
TMOD1
MR0
MR1
Function varies with each operation mode
MR2
MR3
TCK0
Count Source Select Bit
TCK1
(1)
(b8)
b0 b7 b0
Mode
Timer Divide the count source by n + 1 where n =
Mode set value
Event
Divide the count source by FFFFh — n + 1
Counter
where n = set value when counting up or
Mode
by n + 1 when counting down
One-shot Divide the count source by n where n = set
Timer Mode value and cause the timer to stop
Modify the pulse width as follows:
Pulse Width
PWM period: (2
Modulation
High level PWM pulse width: n / fj
Mode
where n = set value, fj = count source
(16-bit PWM )
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
page 116 of 378
Address After Reset
0396h to 039Ah
Bit Name
b1 b0
0 0 : Timer mode
0 1 : Event counter mode
1 0 : One-shot timer mode
1 1 : Pulse width modulation mode
Function varies with each
operation mode
Symbol Address
TA0 0387h to 0386h
TA1 0389h to 0388h
TA2 038Bh to 038Ah
TA3 038Dh to 038Ch
TA4 038Fh to 038Eh
Function
(2)
16
— 1) / fj
— 1) ✕ (m + 1)/ fj
8
00h
Function
After Reset
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Setting Range RW
0000h to FFFFh RW
RW
0000h to FFFFh
(3) (4) WO
0000h to FFFFh
(4) (5) WO
0000h to FFFEh
00h to FEh
(High-order address)
WO
00h to FFh
(Low-order address)
13. Timers
RW
RW
RW
RW
RW
RW
RW
RW
RW