參數(shù)資料
型號(hào)： M37733MHB
廠商： Mitsubishi Electric Corporation
英文描述： Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī))
中文描述： 單片微機(jī)16位的CMOS（16位單片機(jī)）
文件頁(yè)數(shù)： 17/89頁(yè)
文件大?。?/td> 1992K
代理商： M37733MHB
17
MITSUBISHI MICROCOMPUTERS
M37733MHBXXXFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
Data bus (odd)
Data bus (even)
Count start flag
(Address 40
16
)
Down count
Up-down flag
(Address 44
16
)
(High-order 8 bits)
Counter(16)
Up/Down
Always decremented
except in event count mode
Polarity
selection
Timer (gate function)
TAi
IN
(i = 0 – 4)
f
2
f
16
f
64
f
512
Clock source selection
Timer
One-shot
Pulse width modulation
Event counter
External trigger
Timer A0 47
16
46
16
Timer A1 49
16
48
16
Timer A2 4B
16
4A
16
Timer A3 4D
16
4C
16
Timer A4 4F
16
4E
16
Address
(Low-order
8 bits)
Pulse output
TAi
OUT
(i = 0 – 4)
Reload register(16)
Toggle flip-flop
TIMER
There are eight 16-bit timers. They are divided by type into timer A(5)
and timer B(3).
The timer I/O pins are also used as I/O pins for ports P5 and P6. To
use these pins as timer input pins, the port direction register bit
corresponding to the pin must be cleared to “0” to specify the input
mode.
TIMER A
Figure 13 shows a block diagram of timer A.
Timer A has four modes; timer mode, event counter mode, one-shot
pulse mode, and pulse width modulation mode. The mode is selected
with bits 0 and 1 of the timer Ai mode register (i = 0 to 4). Each of
these modes is described below.
(1) Timer mode [00]
Figure 14 shows the bit configuration of the timer Ai mode register
during timer mode. Bits 0, 1, and 5 of timer Ai mode register must
always be “0” in the timer mode.
Bit 3 is ignored if bit 4 is “0”.
Bits 6 and 7 are used to select the timer counter source. The counting
of the selected clock starts when the count start flag is “1” and stops
when it is “0”.
Figure 15 shows the bit configuration of the count start flag. The
counter is decremented. An interrupt is caused and the interrupt
request bit of the timer Ai interrupt control register is set when the
contents becomes 0000
16
. At the same time, the contents of the reload
register are transferred to the counter, and count is continued.
Fig. 13 Block diagram of timer A
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