M30280F6HP RENESAS [Renesas Technology Corp], M30280F6HP Datasheet - Page 131

• Manufacturer Part Number: M30280F6HP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES
• Manufacturer: RENESAS [Renesas Technology Corp]

M
R
R
e
E
1
Table 12.5 Specifications in Pulse Width Modulation Mode
. v
J
6
12.1.4 Pulse Width Modulation (PWM) Mode
0
Count source
Count operation
16-bit PWM
8-bit PWM
Count start condition
Count stop condition
Interrupt request generation timing
TAi
TAi
Read from timer
Write to timer
C
2
9
In PWM mode, the timer outputs pulses of a given width in succession (see Table 12.5). The counter
functions as either 16-bit pulse width modulator or 8-bit pulse width modulator. Figure 12.12 shows
TAiMR register in pulse width modulation mode. Figures 12.13 and 12.14 show examples of how a 16-
bit pulse width modulator operates and how an 8-bit pulse width modulator operates.
2 /
0 .
B
IN
OUT
0
8
0
0
G
pin function
4
J
7
a
o r
pin function
0 -
. n
u
Item
2
3
p
0
, 1
0
(
M
2
0
1
0
6
7
C
2 /
page 111
, 8
M
1
f
• Decrement (operating as an 8-bit or a 16-bit pulse width modulator)
• The timer reloads a new value at a rising edge of PWM pulse and continues counting
• The timer is not affected by a trigger that occurs during counting
• High level width
• Cycle time (2
• High level width n x (m+1) / fj n : set value of TAi register high-order address
• Cycle time
• TAiS bit in the TABSR register is set to “1” (= start counting)
• The TAiS bit = 1 and external trigger input from the TAi
• The TAiS bit = 1 and one of the following external triggers occurs
• Timer B2 overflow or underflow,
TAiS bit is set to “0” (stop counting)
PWM pulse goes “L”
I/O port or trigger input
Pulse output
An indeterminate value is read by reading TAi register
• When not counting and until the 1st count source is input after counting start
6
1
• When counting (after 1st count source input)
C
, f
timer Aj (j=i-1, except j=4 if i=0) overflow or underflow,
timer Ak (k=i+1, except k=0 if i=4) overflow or underflow
Value written to TAi register is written to both reload register and counter
Value written to TAi register is written to only reload register
(Transferred to counter when reloaded next)
2 /
f o
2
, f
8
3
) B
8
8
, f
5
32
, f
C32
(2
8
16
-1) x (m+1) / fj m : set value of TAi register low-order address
-1) / fj fixed
n / fj
Specification
n : set value of TAi register (i=o to 4)
fj: count source frequency (f
IN
pin
1
, f
2
, f
8
, f
32
, f
12. Timer
C32
)