M30280F6HP RENESAS [Renesas Technology Corp], M30280F6HP Datasheet - Page 124

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

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R
R
1
e
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Table 12.2 Specifications in Event Counter Mode (when not processing two-phase pulse signal)
6
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12.1.2 Event Counter Mode
Count source
Count operation
Divided ratio
Count start condition
Count stop condition
Interrupt request generation timing Timer overflow or underflow
TAi
TAi
Read from timer
Write to timer
Select function
0
C
2
9
In event counter mode, the timer counts pulses from an external device or overflows and underflows of
other timers. Timers A2, A3 and A4 can count two-phase external signals. Table 12.2 lists specifications
in event counter mode (when not processing two-phase pulse signal). Table 12.3 lists specifications in
event counter mode (when processing two-phase pulse signal with the timers A2, A3 and A4). Figure
12.8 shows TAiMR register in event counter mode (when not processing two-phase pulse signal). Figure
12.9 shows TA2MR to TA4MR registers in event counter mode (when processing two-phase pulse signal
with the timers A2, A3 and A4).
2 /
0 .
B
IN
OUT
8
0
0
0
G
pin function
4
J
7
o r
a
pin function
0 -
. n
Item
u
2
p
3
0
, 1
0
(
M
2
1
0
6
0
7
C
2 /
, 8
page 104
M
1
6
• External signals input to TAi
• Timer B2 overflows or underflows,
• Increment or decrement can be selected by external signal or program
• When the timer overflows or underflows, it reloads the reload register con-
1/ (FFFF
1/ (n + 1) for down-count
Set TAiS bit in the TABSR register to “1” (start counting)
Set TAiS bit to “0” (stop counting)
I/O port or count source input
I/O port, pulse output, or up/down-count select input
Count value can be read by reading TAi register
• When not counting and until the 1st count source is input after counting start
• When counting (after 1st count source input)
• Free-run count function
• Pulse output function
C
Value written to TAi register is written to only reload register
in program)
timer Aj (j=i-1, except j=4 if i=0) overflows or underflows,
timer Ak (k=i+1, except k=0 if i=4) overflows or underflows
tents and continues counting. When operating in free-running mode, the
timer continues counting without reloading.
Value written to TAi register is written to both reload register and counter
Even when the timer overflows or underflows, the reload register content is
not reloaded to it
Whenever the timer underflows or underflows, the output polarity of TAi
pin is inverted . When not counting, the pin outputs a low.
2 /
f o
(Transferred to counter when reloaded next)
8
3
) B
8
5
16
- n + 1) for increment
n : set value of TAi register
Specification
IN
pin (i=0 to 4) (effective edge can be selected
0000
16
to FFFF
12. Timer
OUT
16