m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 130

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

Table 7.4.3 TAn
Countup
Countdown
<Normal processing>
<Quadruple processing>
Countup is performed at the rising edges
input to the TAm
2, 3, 7, 8) and TAm
that the TAm
“L” to “H” while the TAm
nal is at “H” level.
Countdown is performed at the falling edges
input to the TAm
TAm
pin’s input signal goes from “H” to “L” while
the TAm
Figure 7.4.7.)
Countup is performed at all rising and fall-
ing edges input to the TAn
TAn
the relationship that the TAn
signal level goes from “L” to “H” while the
TAn
Countdown is performed at all rising and
falling edges input to the TAn
pins when the TAn
relationship that the TAn
level goes from “H” to “L” while the TAn
pin’s input signal is at “H” level. (See Figure
7.4.8.)
Table 7.4.3 lists the input signals on the
TAn
processing is selected.
IN
OUT
OUT
OUT
pins when the TAn
and TAn
have the relationship that the TAm
pin’s input signal is at “H” level.
OUT
OUT
pin’s input signal is “H.” (See
IN
and TAn
pin’s input signal goes from
IN
IN
IN
pin when the TAm
pins when the quadruple
pin when the TAm
OUT
IN
and TAn
IN
have the relationship
IN
IN
OUT
Input signal to TAn
pin’s input signals when quadruple processing is selected (n = 4, 9)
OUT
pin’s input signal
and TAn
pin’s input sig-
OUT
(n = 4, 9) and
IN
OUT
Falling edge
Falling edge
Rising edge
Rising edge
7905 Group User’s Manual Rev.1.0
pin’s input
and TAn
“H” level
“H” level
“L” level
“L” level
have the
OUT
IN
IN
have
(m =
and
OUT
IN
IN
OUT
pin
Fig. 7.4.7 Normal processing
Fig. 7.4.8 Quadruple processing
(m = 2, 3, 7, 8)
(n = 4, 9)
TAn
TAn
OUT
TAm
IN
TAm
“H”
“L”
“H”
“L”
OUT
IN
+1
Counted up at all edges.
“H”
“L”
“H”
“L”
+1
Counted up at all edges.
+1
Countup
+1
+1
+1
+1
Countup
+1
Input signal to TAn
+1
7.4 Event counter mode
+1
+1
+1
Countup Countdown Countdown Countdown
Falling edge
Falling edge
Rising edge
Rising edge
+1
“H” level
“H” level
“L” level
“L” level
Counted down at all edges.
–1
Counted down at all edges.
–1
–1
–1
TIMER A
–1
–1
IN
–1
–1
pin
–1
–1
–1
–1
–1
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