Section 9
16-Bit Timer Pulse Unit (TPU)
Rev.2.00 Jun. 28, 2007 Page 387 of 666
REJ09B0311-0200
9.9.11 Conflict
between
Overflow/Underflow and Counter Clearing
If overflow/underflow and counter clearing occur simultaneously, the TCFV/TCFU flag in TSR is
not set and TCNT clearing takes precedence.
Figure 9.53 shows the operation timing when a TGR compare match is specified as the clearing
source, and H'FFFF is set in TGR.
Counter clear signal
H'0000
P
φ
TCNT input clock
TCNT
TGF flag
TCFV flag
H'FFFF
Disabled
Figure 9.53 Conflict between Overflow and Counter Clearing
9.9.12 Conflict
between
TCNT
Write and Overflow/Underflow
If an overflow/underflow occurs due to increment/decrement in the T2 state of a TCNT write
cycle, the TCNT write takes precedence and the TCFV/TCFU flag in TSR is not set.
Figure 9.54 shows the operation timing when there is conflict between TCNT write and overflow.
P
φ
TCNT
H'FFFF
TCFV flag
Address
Write
TCNT address
M
TCNT write data
TGR write cycle
T
1
T
2
Figure 9.54 Conflict between TCNT Write and Overflow
Содержание H8SX/1650
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Страница 106: ...Section 4 Exception Handling Rev 2 00 Jun 28 2007 Page 84 of 666 REJ09B0311 0200...
Страница 142: ...Section 5 Interrupt Controller Rev 2 00 Jun 28 2007 Page 120 of 666 REJ09B0311 0200...
Страница 326: ...Section 8 I O Ports Rev 2 00 Jun 28 2007 Page 304 of 666 REJ09B0311 0200...
Страница 470: ...Section 12 Watchdog Timer WDT Rev 2 00 Jun 28 2007 Page 448 of 666 REJ09B0311 0200...
Страница 546: ...Section 13 Serial Communication Interface SCI Rev 2 00 Jun 28 2007 Page 524 of 666 REJ09B0311 0200...
Страница 566: ...Section 14 A D Converter Rev 2 00 Jun 28 2007 Page 544 of 666 REJ09B0311 0200...
Страница 574: ...Section 16 RAM Rev 2 00 Jun 28 2007 Page 552 of 666 REJ09B0311 0200...
Страница 584: ...Section 17 Clock Pulse Generator Rev 2 00 Jun 28 2007 Page 562 of 666 REJ09B0311 0200...
Страница 638: ...Section 19 List of Registers Rev 2 00 Jun 28 2007 Page 616 of 666 REJ09B0311 0200...
Страница 668: ...Section 20 Electrical Characteristics Rev 2 00 Jun 28 2007 Page 646 of 666 REJ09B0311 0200...
Страница 676: ...Appendix Rev 2 00 Jun 28 2007 Page 654 of 666 REJ09B0311 0200...
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Страница 692: ...H8SX 1650 Group Hardware Manual...