Section 9
16-Bit Timer Pulse Unit (TPU)
Rev.2.00 Jun. 28, 2007 Page 381 of 666
REJ09B0311-0200
9.9 Usage
Notes
9.9.1
Module Stop State Setting
Operation of the TPU can be disabled or enabled using the module stop control register. The initial
setting is for operation of the TPU to be halted. Register access is enabled by clearing module stop
state. For details, see section 18, Power-Down States.
9.9.2 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 9.45 shows the input clock
conditions in phase counting mode.
TCLKA
(TCLKC)
TCLKB
(TCLKD)
Overlap
Phase
difference
Pulse width
Note: Phase difference, Overlap
≥
1.5 states
Pulse width
≥
2.5 states
Pulse width
Phase
difference
Overlap
Pulse width
Pulse width
Figure 9.45 Phase Difference, Overlap, and Pulse Width in Phase Counting Mode
Содержание H8SX/1650
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