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TMP93CS32F датащи(PDF) 80 Page - Toshiba Semiconductor

номер детали TMP93CS32F
подробное описание детали  CMOS 16-Bit Microcontroller
PDF  180 Pages
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производитель  TOSHIBA [Toshiba Semiconductor]
домашняя страница  http://www.semicon.toshiba.co.jp/eng
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TMP93CS32F датащи(HTML) 80 Page - Toshiba Semiconductor

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TMP93CS32
2004-02-10
93CS32-78
2. Generating a 50% duty square wave pulse
The timer flip-flop is included in timers 1 and 3.
The timer flip-flop (TFF3) is inverted at constant intervals, and its status is output
to timer output pin (TO3). The output pin of TFF1 does not exist.
Example: To output a 2.4
µs square wave pulse from TO3 pin at fc = 20 MHz, set each register in the following
procedures. Either timer 2 or timer 3 may be used, but this example uses timer 3.
* Clock Condition
Clock gear: 1 (fc)
Prescaler clock: fFPH
7
6
5
4
3
2
1
0
TRUN
← − X − − 0 −− −
Stop timer 3, and clear it to “0”.
T32MOD
← 0 0 X X 0 1 −−
Set the 8-bit timer mode, and select
φT1 (0.4 µs at fc = 20
MHz) as the input clock.
TREG3
← 0 0 0 0 0 0 1 1
Set the timer register at 2.4
µ s ÷ φT1 ÷ 2 = 3.
TFFCR
← 1 0 1 1 − − − −
Set TFF3 to “0”, and set to invert by the match detect signal
from timer 3.
P4CR
← X X X X − − 1 −
P4FC
← X X X X − − 1X
Select P41 as TO3 pin.
TRUN
← 1 X − − 1 −− −
Start timer 3 counting.
X: Don’t care,
−: No change
Figure 3.7.10 Square Wave (50% duty) Output Timing Chart
1.2
µs at fc = 20 MHz
0
1
2
3
0
1
2
3
0
1
2
3
0
φT1
TRUN
<T3RUN>
BIT7 to BIT2
Up counter BIT1
BIT0
INTT3
TFF3
TO3
Comparator
timing
Comparator output
(matching detect)
UC3 clear



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