參數(shù)資料
型號： M30218MC-XXXXFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP100
封裝： PLASTIC, QFP-100
文件頁數(shù)： 146/161頁
文件大?。?/td> 2043K
代理商： M30218MC-XXXXFP
85
Under
development
Tentative Specifications REV.A
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
TimerB
Item
Specification
Count source
f1, f8, f32, fC32
Count operation
Up count
Counter value “000016” is transferred to reload register at measurement
pulse's effective edge and the timer continues counting
Count start condition
Count start flag is set (= 1)
Count stop condition
Count start flag is reset (= 0)
Interrupt request generation timing When measurement pulse's effective edge is input (Note 1)
When an overflow occurs. (Simultaneously, the timer Bi overflow flag
changes to “1”. The timer Bi overflow flag changes to “0” when the count start
flag is “1” and a value is written to the timer Bi mode register.)
TBiIN pin function
Measurement pulse input
Read from timer
When timer Bi register is read, it indicates the reload register’s content
(measurement result) (Note 2)
Write to timer
Cannot be written to
Note 1: An interrupt request is not generated when the first effective edge is input after the timer has started counting.
Note 2: The value read out from the timer Bi register is indeterminate until the second effective edge is input after the timer.
(3) Pulse period/pulse width measurement mode
In this mode, the timer measures the pulse period or pulse width of an external signal. (See Table TA-3.)
Figure TA-6 shows the timer Bi mode register in pulse period/pulse width measurement mode. Figure
TA-7 shows the operation timing when measuring a pulse period. Figure TA-8 shows the operation
timing when measuring a pulse width.
Table TA-3. Timer specifications in pulse period/pulse width measurement mode
Figure TA-6. Timer Bi mode register in pulse period/pulse width measurement mode
Timer Bi mode register
SymbolAddressWhen reset
TBiMR (i=0 to 2)039B16 to 039D16
00XX00002
Bit name
Bit symbol
W
R
b7b6b5b4b3b2b1b0
Operation mode
select bit
1 0 : Pulse period / pulse width measurement mode
b1 b0
TMOD1
TMOD0
MR0
Measurement mode
select bit
MR2
MR1
MR3
TCK1
TCK0
0
1
0 0 : Pulse period measurement (Interval between
measurement pulse's falling edge to falling edge)
0 1 : Pulse period measurement (Interval between
measurement pulse's rising edge to rising edge)
1 0 : Pulse width measurement (Interval between
measurement pulse's falling edge to rising edge,
and between rising edge to falling edge)
1 1 : Inhibited
Function
b3 b2
Nothing is assigned (i = 1, 2).
In an attempt to write to this bit, write “0”. The value, if read in event counter
mode, turns out to be indeterminate.
Count source
select bit
Timer Bi overflow
flag ( Note 1)
0 : Timer did not overflow
1 : Timer has overflowed
0 0 : f1
0 1 : f8
1 0 : f32
1 1 : fC32
b7 b6
Note 1: The timer Bi overflow flag changes to “0” when the count start flag is “1” and a value is written to the
timer Bi mode register. This flag cannot be set to “1” by software.
Note 2: Timer B0.
Note 3: Timer B1, timer B2.
0 (Fixed to “0” in pulse period/pulse width measurement mode; i = 0)
(Note 2)
(Note 3)
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