HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 551
HD6412320
Manufacturer Part Number
HD6412320
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412320.pdf
(1302 pages)
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10.7
Note that the kinds of operation and contention described below can occur during TPU operation.
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 10.48 shows the input clock
conditions in phase counting mode.
Caution on Period Setting: When counter clearing by compare match is set, TCNT is cleared in
the final state in which it matches the TGR value (the point at which the count value matched by
TCNT is updated). Consequently, the actual counter frequency is given by the following formula:
Where
TCLKA
(TCLKC)
TCLKB
(TCLKD)
Notes: Phase difference and overlap
Figure 10.48 Phase Difference, Overlap, and Pulse Width in Phase Counting Mode
f =
Usage Notes
f
φ : Operating frequency
N : TGR set value
Pulse width
(N + 1)
: Counter frequency
φ
Overlap
Pulse width
Phase
differ-
ence
Overlap
: 1.5 states or more
: 2.5 states or more
Phase
differ-
ence
Pulse width
Rev.6.00 Sep. 27, 2007 Page 521 of 1268
Section 10 16-Bit Timer Pulse Unit (TPU)
Pulse width
Pulse width
REJ09B0220-0600
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