M16C62P_06 Datasheet, PDF (155/421 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

M16C/62P Group (M16C/62P, M16C/62PT)
15. Timers
Timer Ai Mode Register (i=0 to 4)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
After Reset
TA0MR to TA4MR
0396h to 039Ah
00h
Bit Symbol
Bit Name
Function
RW
Operation Mode Select Bit
b1 b0
TMOD0
0 0 : Timer mode
RW
0 1 : Event counter mode
TMOD1
1 0 : One-shot timer mode
RW
1 1 : Pulse w idth modulation (PWM) mode
MR0
MR1
MR2
MR3
TCK0
TCK1
—
Count Source Select Bit
Function varies w ith each operation mode
RW
RW
RW
RW
Function varies w ith each operation mode
RW
RW
Timer Ai Register (i= 0 to 4) ⁽¹⁾
(b15)
(b8)
b7
b0 b7
b0
Symbol
TA0
TA1
TA2
TA3
TA4
Address
0387h, 0386h
0389h, 0388h
038Bh, 038Ah
038Dh, 038Ch
038Fh, 038Eh
After Reset
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Mode
Function
Setting Range
RW
Timer Mode
Divide the count source by n + 1 w here n = set 0000h to FFFFh
value
RW
Event Counter
Divide the count source by FFFFh – n + 1 w here 0000h to FFFFh
Mode
n = set value w hen counting up or by n + 1 w hen
RW
counting dow n ⁽⁵⁾
One-Shot Timer Divide the count source by n w here n = set value 0000h to FFFFh^{(2, 4)}
Mode
and factor the timer to stop
WO
Pulse Width
Modify the pulse w idth as follow s:
0000h to FFFEh^{(3, 4)}
Modulation Mode PWM period: (2¹⁶ – 1) / fj
(16-Bit PWM)
High level PWM pulse w idth: n / fj
WO
w here n = set value, fj = count source frequency
Pulse Width
Modulation Mode
(8-Bit PWM)
Modify the pulse w idth as follow s:
PWM period: (2⁸ – 1) × (m + 1)/ f j
High level PWM pulse w idth: (m + 1)n / fj
w here n = high-order address set value,
m = low -order address set value, fj = count
source frequency
00h to FEh
(High-order address)
00h to FFh
(Low -order address) ^WO
(3, 4)
NOTES :
1. The register must be accessed in 16-bit units.
2. If the TAi register is set to “0000h”, the counter does not w ork and timer Ai interrupt requests are not generated
either. Furthermore, if “pulse output” is selected, no pulses are output f rom the TAiOUT pin.
3. If the TAi register is set to “0000h”, the pulse w idth modulator does not w ork, the output level on the TAiOUT pin
remains low , and timer Ai interrupt requests are not generated either. The same applies w hen the 8 high-order bits
of the timer TAi register are set to “00h” w hile operating as an 8-bit pulse w idth modulator.
4. Use the MOV instruction to w rite to the TAi register.
5. The timer counts pulses from an external device or overflow s or underflow s in other timers.
Figure 15.4 TAiMR and TAi Registers
Rev.2.41 Jan 10, 2006 Page 140 of 390
REJ09B0185-0241