M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 162

• 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

Table 6.5.3 Relationship between measurement mode select bits and pulse period/pulse width measurements
TIMER B
6.5 Pulse period/pulse width measurement mode
6–24
6.5.3 Operation in pulse period/pulse width measurement mode
Note: The timer Bi interrupt request does not occur when the first valid edge is input after the timer starts
b3
(1) Pulse period/pulse width measurement
0
0
1
1
is detected. (Refer to section “(1) Pulse period/pulse width measurement.”)
The interrupt request bit remains set to “1” until the interrupt request is accepted or the interrupt request
bit is cleared to “0” by software.
The timer Bi interrupt request bit is set to “1” when the counter value is cleared to “0000
When the count start bit is set to “1,” the counter starts counting of the count source.
The counter value is transferred to the reload register when an valid edge of the measurement pulse
The counter value is cleared to “0000
The timer repeats operations
counting.
period of an external signal is measured or its pulse width is done. Table 6.5.3 lists the relationship
between the measurement mode select bits and the pulse period/pulse width measurements.
the falling are two cycles of the count source or more. Additionally, use software to identify whether
the measurement result indicates the “H” level or the “L” level width.
The measurement mode select bits (bits 2 and 3 at addresses 5B
Make sure that the measurement pulse interval from the falling to the rising, and from the rising to
b2
0
1
0
1
Pulse period/pulse width measurement
Pulse period measurement
Pulse width measurement
Not selected
to
7702/7703 Group User’s Manual
above.
16
” after the transfer in
Measurement interval (Valid edges)
From falling to falling (Falling)
From rising to rising (Rising)
From falling to rising, and from rising to falling
(Falling and rising)
, and the counter continues counting.
16
to 5D
16
) specify whether the pulse
16
” in
(Note).