m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 171
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m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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Count source f
Count operation
Count start condition
Count stop condition
Interrupt request occurrence timing
TBi
Read from timer Bi register
Write to timer Bi register
Timer Bi overflow flag: This bit is used to identify the source of an interrupt request occurrence.
Notes 1: No interrupt request occurs when the first valid edge is input after the counter starts counting.
TIMER B
8.5 Pulse period/Pulse width measurement mode
Table 8.5.2 Specifications of pulse period/pulse width measurement mode (when free-run type is selected)
8-20
IN
pin’s function
2: When using timer B2, make sure that the timer B2 clock source select bit (see Figure 8.4.2.) =
3: The value read out from the timer Bi register is undefined in the period after the counter starts
“0.”
counting until the second valid edge is input.
Item
i
f
When the count start bit is set to “1.”
When the count start bit is cleared to “0.”
When a valid edge of measurement pulse is input (Note 1).
Measurement pulse input pin (Note 2)
The value obtained by reading the timer Bi register is the reload
register’s contents (Measurement result) (Note 3).
Invalid
2
, f
7905 Group User’s Manual Rev.1.0
Countup
Counter value is transferred to the reload register at valid edge of
measurement pulse, and counting continues.
When a counter overflow occurs, the timer Bi overflow flag is set to
“1,” and counting continues after clearing the counter value to “0000
16
, f
64
, or f
512
Specifications
16
.”
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