Renesas M16C Series User Manual

Timer A
M30240 Group
Rev.1.00 Sep 24, 2003 Page 168 of 360
Figure 2.28: Set-up procedure of pulse width modulation mode, 8-bit PWM mode selected
Setting PWM pulse's “H” level width
Can be set to 0016 to FE16
b7 b0
(b15) (b8)
b7 b0
Timer A0 register [Address 038716, 038616] TA0
Timer A1 register [Address 0389
16, 038816] TA1
Timer A2 register [Address 038B
16, 038A16] TA2
Timer A3 register [Address 038D
16, 038C16] TA3
Timer A4 register [Address 038F
16, 038E16] TA4
Start count
Setting count starts flag
Count start flag [Address 0380 16]
TABSR
Timer A0 count start flag
Timer A1 count start flag
Timer A2 count start flag
Timer A3 count start flag
Timer A4 count start flag
b7 b0
Setting event/trigger select bit
One-shot start flag [Address 0382 16]
ONSF
Timer A0 event/trigger select bit
0 0 : Input on TA0 IN is selected (Note 2)
b7 b6
b7 b0 b7 b0
Timer A1 event/trigger select bit
0 0 : Input on TA1 IN is selected (Note 2)
b1 b0
Timer A2 event/trigger select bit
0 0 : Input on TA2 IN is selected (Note 2)
b3 b2
Timer A3 event/trigger select bit
0 0 : Input on TA3 IN is selected (Note 2)
b5 b4
Timer A4 event/trigger select bit
0 0 : Input on TA4 IN is selected (Note 2)
b7 b6
Note 2: Set the corresponding port direction register to “0”.
Trigger select register [Address 0383
16]
TRGSR
1 (Must always be “1” in PWM mode)
Selecting PWM mode and functions
Timer Ai mode register (i=0 to 4) [Address 0396 16 to 039A16]
TAiMR
(i=0
to 4)
External trigger select bit
0 : Falling edge of TAi
IN pin's input signal (Note 1)
Selection of PWM mode
b7 b0
11011
16/8-bit PWM mode select bit
1 : Functions as a 8-bit pulse width modulator
b7 b6
Count source select bit
0 0 : f
1
0 1 : f8
1 0 : f32
1 1 : Reserved
Trigger select bit
1 : Selected by event/trigger select register
Count source period
f(XIN) : 12MHZ
b7 b6
Count
source
83.3ns
667ns
2.67
µs
00
01
10
f
1
f8
f32
Note 1: Set the corresponding port direction
register to “0”.
Clearing timer Ai interrupt request bit
Timer Ai interrupt control register [Address 0055 16 to 005916]
TAiIC (i=0 to 4)
Interrupt request bit
b7 b0
0
Refer to 'Precaution for Timer A (pulse width modulation mode)'
1
Can be set to 00
16 to FE16
Start count
Setting the TAiOUT drive capacity
Timer A output drive capacity register
[Address 03FB16 ]
TA DR
Timer A0
OUT drive capacity
Timer A1
Timer A2
Timer A3
Timer A4
b7 b0
OUT drive capacity
OUT drive capacity
OUT drive capacity
OUT drive capacity

Renesas M16C Series Specifications

General

Brand	Renesas
Model	M16C Series
Category	Computer Hardware
Language	English