M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 157

• 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

6.5 Pulse period/pulse width measurement mode
In these mode, the timer measures an external signal’s pulse period or pulse width. (Refer to Table 6.5.1.)
Figure 6.5.1 shows the structures of the timer Bi mode register and timer Bi register in the pulse period/
pulse width measurement mode.
Table 6.5.1 Specifications of pulse period/pulse width measurement mode
Count source
Count operation
Count start condition
Count stop condition
Interrupt request occurrence timing
TBi
Read from timer Bi register
Write to timer Bi register
Overflow flag : The bit used to identify the source of an interrupt request occurrence.
Notes 1: This interrupt request does not occur when the first valid edge is input after the timer starts
IN
Pulse period measurement
Pulse width measurement
pin function
The timer measures the pulse period of the external signal that is input to the TBi
The timer measures the pulse width (“L” level and “H” level widths) of the external signal that is input
to the TBi
2: The value read out from the timer Bi register is undefined until the second valid edge is input after
counting.
the timer starts counting.
Item
IN
pin.
f
When count start bit is set to “1”
When count start bit is cleared to “0”
Measurement pulse input
The value got by reading timer Bi register is the reload register’s
contents, measurement result (Note 2).
Impossible.
2
, f
Up-count
Counter value is transferred to reload register at valid edge of mea-
surement pulse, and counting continues after clearing the counter
value to “0000
When valid edge of measurement pulse is input (Note 1).
When counter overflows (overflow flag is set to “1” simultaneously).
7702/7703 Group User’s Manual
16
, f
6.5 Pulse period/pulse width measurement mode
64
, or f
512
16
.”
Specifications
TIMER B
IN
pin.
6–19