Section 11
8-Bit Timers (TMR)
Rev.2.00 Jun. 28, 2007 Page 429 of 666
REJ09B0311-0200
11.5.5
Timing of TCNT External Reset
TCNT is cleared at the rising edge or high level of an external reset input, depending on the
settings of bits CCLR1 and CCLR0 in TCR. The clear pulse width must be at least 2 states.
Figures 11.10 and 11.11 show the timing of this operation.
P
φ
Clear signal
External reset
input pin
TCNT
N
H'00
N – 1
Figure 11.10 Timing of Clearance by External Reset (Rising Edge)
P
φ
Clear signal
External reset
input pin
TCNT
N
H'00
N – 1
Figure 11.11 Timing of Clearance by External Reset (High Level)
11.5.6 Timing
of
Overflow Flag (OVF) Setting
The OVF bit in TCSR is set to 1 when TCNT overflows (changes from H'FF to H'00). Figure
11.12 shows the timing of this operation.
P
φ
OVF
Overflow signal
TCNT
H'FF
H'00
Figure 11.12 Timing of OVF Setting
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...