m37702s1afp Mitsumi Electronics, Corp., m37702s1afp Datasheet - Page 26

• Manufacturer Part Number: m37702s1afp
• Description: Single-chip 16-bit Cmos Microcomputer
• Manufacturer: Mitsumi Electronics, Corp.

After the contents of the counter is transferred to the reload regis-
ter, an interrupt request signal is generated and the interrupt
request bit in the timer Bi interrupt control register is set. However,
no interrupt request signal is generated when the contents of the
counter is transferred first time to the reload register after the
count start flag is set to “1”.
When bit 3 is “1”, the pulse width measurement mode is selected.
Pulse width measurement mode is similar to pulse period mea-
surement mode except that the clock is counted from the fall of the
TBi
Fig. 31 Pulse period measurement mode operation (example of measuring the interval between the falling edge to next falling one)
Fig. 32 Pulse width measurement mode operation
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IN
pin input signal to the next rise or from the rise of the input
Reload register
Reload register Counter
Interrupt request signal
Selected clock
Count start flag
clock source fi
request signal
Counter 0
source f
Counter 0
Count start
Selected
Interrupt
Counter
TBi
TBi
i
IN
flag
IN
M37702M2AXXXFP, M37702M2BXXXFP
signal to the next fall as shown in Figure 32.
When timer Bi is read, the contents of the reload register is read.
Note that in this mode, the interval between the fall of the TBi
input signal to the next rise or from the rise to the next fall must be
at least two cycles of the timer count source.
Timer Bi overflow flag which is bit 5 of time Bi mode register is set
to “1” when the timer Bi counter reaches 0000
This flag is cleared by writing to corresponding timer Bi mode reg-
ister. This bit is set to “1” at reset.
M37702S1AFP, M37702S1BFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
16
.
IN
pin