M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 165

• Manufacturer Part Number: M37702E6BFS
• Description: EPROM MCU/8BIT CMOS EMULATION CH
• Manufacturer: Renesas Electronics America

Specifications of M37702E6BFS

• Accessory Type: Emulator EPROM MCU
• For Use With/related Products: 7702
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

[Precautions when operating in pulse period/pulse width measurement mode]
1. The timer Bi interrupt request occurs by the following two causes:
2. After reset, the timer Bi overflow flag is undefined. When writing to the timer Bi mode register with the
3. An undefined value is transferred to the reload register when the first valid edge is input after the counter
4. The counter value at start of counting is undefined. Accordingly, the timer Bi interrupt request may occur
5. If the contents of the measurement mode select bits are changed after the counter starts counting, the
6. If the input signal to the TBi
When the overflow is the cause of the interrupt request occurrence, the timer Bi overflow flag is set to
“1.”
count start bit = “1,” this flag can be cleared to “0” at the next count timing of the count source.
starts counting. In this case, the timer Bi interrupt request does not occur.
by the overflow immediately after the counter starts counting.
timer Bi interrupt request bit is set to “1.” When writing the same value which has been set yet to the
measurement mode select bits, the timer Bi interrupt request bit is not changed, that is, the bit retains
the state.
measurement. We recommend to verify, by software, that the measurement values are within a constant
range.
Input of measured pulse’s valid edge
Counter overflow
IN
pin is affected by noise, etc., the counter may not perform the exact
7702/7703 Group User’s Manual
6.5 Pulse period/pulse width measurement mode
TIMER B
6–27