M32C8A Datasheet, PDF (193/372 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M32C/80 Series

M32C/8A Group
15. Timers (Timer B)
Pulse input
“H”
to TBiIN pin⁽²⁾
“L”
1st valid edge
2nd valid edge
Contents of the counter
(n = contents of the
reload register)
FFFFh
n
(note 1)
0000h
TBiS bit in the TABSR register
or TBSR register
IR bit in the TBiIC
register
Transfer timing from counter
to reload register
TBi register
1
0
Set to 0 by an interrupt request acknowledgement or by program
1
0
Transfer (undefined value) Transfer (measured value n)
Undefined value
n
i = 0 to 5
NOTES:
1. Counter is reset due to the completion of the measurement.
2. If an overflow and a valid edge input occur simultaneously, an interrupt request is generated only once,
which results in the valid edge not being recognized. Do not let an overflow occur.
Figure 15.29 Operation in Pulse Period Measurement Mode (Timer B)
Rev.1.00 Jul 15, 2007 Page 176 of 352
REJ09B0385-0100