RX610 Group
15. 16-Bit Timer Pulse Unit (TPU)
R01UH0032EJ0120 Rev.1.20
Page 519 of 1006
Feb 20, 2013
15.9
Usage Notes
15.9.1
Module Stop Function Setting
Operation of the TPU can be disabled or enabled using the module stop control register. The TPU does not operate with
the initial setting. Register access is enabled by clearing module stop state. For details, see section 8, Low Power
Consumption.
15.9.2
Input Clock Restrictions
The input clock pulse width must be at least 1.5 states in the case of single-edge detection, and at least 2.5 states in the
case of both-edge detection. The TPU will not operate properly with a narrower pulse width.
In phase counting mode, the phase difference and overlap between the two input clocks must be at least 1.5 states, and
the pulse width must be at least 2.5 states. Figure 15.43 shows the input clock conditions in phase counting mode.
Overlap
Phase
difference
TCLKA (TCLKC)
TCLKB (TCLKD)
Pulse width
Pulse width
Pulse width
Pulse width
Note:
Overlap
Phase
difference
Phase difference, Overlap:
Pulse width:
at least 1.5 states
at least 2.5 states
Figure 15.43 Phase Difference, Overlap, and Pulse Width in Phase Counting Mode