參數(shù)資料
型號(hào)： M37560EFDFP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP100
封裝： 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100
文件頁數(shù)： 27/92頁
文件大?。?/td> 1507K
代理商： M37560EFDFP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
7560 Group
30
Timer Y
Timer Y is a 16-bit timer and is equipped with the timer latch. The
division ratio of timer Y is given by 1/(n+1), where n is the value in
the timer latch. Timer Y is a down-counter. When the contents of
timer Y reach “000016”, an underflow occurs at the next count
pulse and the contents of the timer latch are reloaded into the
timer and the count is continued. When the timer underflows, the
timer Y interrupt request bit is set to “1”.
Timer Y can be selected in one of four modes by the timer Y mode
register.
(1) Timer mode
The timer counts f(XIN)/16 (or f(XCIN)/16 in low-speed mode).
(2) Period measurement mode
CNTR1 interrupt request is generated at rising or falling edge of
CNTR1 pin input signal. Simultaneously, the value in timer Y latch
is reloaded in timer Y and timer Y continues counting down.
Except for this, the operation in period measurement mode is the
same as in timer mode.
The timer value just before the reloading at rising or falling of
CNTR1 pin input signal is retained until the next valid edge is
input.
The rising or falling timing of CNTR1 pin input signal can be
discriminated by CNTR1 interrupt. When using a timer in this
mode, set the P55/CNTR1 pin to input mode (set “0” to bit 5 of port
P5 direction register).
(3) Event counter mode
The timer counts signals input through the CNTR1 pin.
Except for this, the operation in event counter mode is the same
as in timer mode. When using a timer in this mode, set the
P55/CNTR1 pin to input mode (set “0” to bit 5 of port P5 direction
register).
(4) Pulse width HL continuously measure-
ment mode
CNTR1 interrupt request is generated at both rising and falling
edges of CNTR1 pin input signal. Except for this, the operation in
pulse width HL continuously measurement mode is the same as in
period measurement mode. When using a timer in this mode, set
the P55/CNTR1 pin to input mode (set “0” to bit 5 of port P5
direction register).
sNote on CNTR1 interrupt active edge selection
CNTR1 interrupt active edge depends on the value of the CNTR1
active edge switch bit. However, in pulse width HL continuously
measurement mode, CNTR1 interrupt request is generated at both
rising and falling edges of CNTR1 pin input signal regardless of
the value of CNTR1 active edge switch bit.
Fig. 26 Structure of timer Y mode register
Timer Y mode register
(TYM : address 002816)
b7
b0
Not used (“0” at reading)
Timer Y operating mode bits
b5b4
00 : Timer mode
01 : Period measurement mode
10 : Event counter mode
11 : Pulse width HL continuously
measurement mode
CNTR1 active edge switch bit
0 : Count at rising edge in event counter mode
Measure the falling edge to falling edge
period in period measurement mode
Falling edge active for CNTR1 interrupt
1 : Count at falling edge in event counter mode
Measure the rising edge period in period
measurement mode
Rising edge active for CNTR1 interrupt
Timer Y stop control bit
0 : Count start
1 : Count stop
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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