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參數(shù)資料
| 型號： | M37702M2B |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | Single Chip 16 Bits CMOS Microcomputer(16位單片機) |
| 中文描述： | 單片微機16位的CMOS（16位單片機） |
| 文件頁數(shù)： | 19/59頁 |
| 文件大小： | 811K |
| 代理商： | M37702M2B |
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19
MITSUBISHI MICROCOMPUTERS
M37702M2AXXXFP, M37702M2BXXXFP
M37702S1AFP, M37702S1BFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Fig. 19 Timer Aj mode register bit configuration when per-
forming two-phase pulse signal processing in event
counter mode
Data write and data read are performed in the same way as for
timer mode. That is, when data is written to timer Ai halted, it is
also written to the reload register and the counter. When data is
written to timer Ai which is busy, the data is written to the reload
register, but not to the counter. The counter is reloaded with new
data from the reload register at the next reload time. The counter
can be read at any time.
In event counter mode, whether to increment or decrement the
counter can also be determined by supplying two-phase pulse in-
put with phase shifted by 90° to timer A2, A3, or A4. There are two
types of two-phase pulse processing operations. One uses timers
A2 and A3, and the other uses timer A4. In either processing op-
eration, two-phase pulse is input in the same way, that is, pulses
out of phase by 90° are input at the TAj
OUT
(j = 2 to 4) pin and
TAj
IN
pin.
When timers A2 and A3 are used, as shown in Figure 17, the
count is incremented when a rising edge is input to the TAk
IN
pin
after the level of TAk
OUT
(k = 2, 3) pin changes from “L” to “H”, and
when the falling edge is inserted, the count is decremented.
For timer A4, as shown in Figure 18, when a phase related pulse
with a rising edge input to the TA4
IN
pin is input after the level of
TA4
OUT
pin changes from “L” to “H”, the count is incremented at
the respective rising edge and falling edge of the TA4
OUT
pin and
TA4
IN
pin.
When a phase related pulse with a falling edge input to the
TA4
OUT
pin is input after the level of TA4
IN
pin changes from “H” to
“L”, the count is decremented at the respective rising edge and
falling edge of the TA4
IN
pin and TA4
OUT
pin. When performing
this two-phase pulse signal processing, timer Aj mode register bit
0 and bit 4 must be set to “1” and bits 1, 2, 3, and 5 must be “0”.
Bits 6 and 7 are ignored. Note that bits 5, 6, and 7 of the up-down
flag register (44
16
) are the two-phase pulse signal processing se-
lection bit for timer A2, A3, and A4 respectively. Each timer
operates in normal event counter mode when the corresponding
bit is “0” and performs two-phase pulse signal processing when it
is “1”.
Count is started by setting the count start flag to “1”. Data write
and read are performed in the same way as for normal event
counter mode. Note that the direction register of the input port
must be set to input mode because two-phase pulse signal is in-
put. Also, there can be no pulse output in this mode.
Fig. 17 Two-phase pulse processing operation of timer A2 and timer A3
Fig. 18 Two-phase pulse processing operation of timer A4
TAk
OUT
TAk
IN
(k = 2, 3)
Increment-
count
Increment-
count
Increment-
count
Decrement-
count
Decrement-
count
Decrement-
count
Addresses
0 1 : Always “01” in event counter
mode
7 6 5 4 3 2 1 0
0
0 1
0 1 0 0 : Always “0100” when processing
two-phase pulse signal
Timer A2 mode register 58
16
Timer A3 mode register 59
16
Timer A4 mode register 5A
16
1 0 0
: Not used in event counter mode
TA4
OUT
TA4
IN
Increment
-
count at each edge
Decrement
-
count at each edge
Increment
-
count at each edge
Decrement
-
count at each edge
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M37702M2BXXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37702M2B-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37702M2L | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37702M2L249HP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37702M2L-249HP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
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