Section 16 Watchdog Timer and Reset
Rev.1.00 Dec. 13, 2005 Page 640 of 1286
REJ09B0158-0100
16.5.3
Manual Reset by Watchdog Timer Overflow
The transition time from watchdog timer overflowed to manual reset state (watchdog timer reset
setup time) is 1 clock cycle of the XTAL clock and thereafter equal to or more than 5 clock cycles
of the peripheral clock (Pck).
The manual reset time (watchdog timer manual reset holding time) by the watchdog timer
overflowed is equal to or more than 3774 clock cycles of the XTAL clock.
The STATUS [1:0] pins output timing that indicates the reset state or a normal operation is
asynchronous with both the XTAL clock and the CLKOUT pin output clock because the STATUS
[1:0] pins output timing is synchronous with the peripheral clock (Pck).
Manual Reset by Watchdog timer Overflowed in Normal Operation
CLKOUT
output
WDT overflow
signal
STATUS[1:0]
output
HH (reset)
LL (normal)
LL (normal)
XTAL
(oscillator)
WDT reset
setup time
Manual reset
holding time
MRESETOUT
output
Figure 16.8 STATUS Output by Watchdog timer overflow Manual Reset
during Normal Operation
Summary of Contents for SH7780 Series
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Page 82: ...Section 1 Overview Rev 1 00 Dec 13 2005 Page 32 of 1286 REJ09B0158 0100 ...
Page 122: ...Section 3 Instruction Set Rev 1 00 Dec 13 2005 Page 72 of 1286 REJ09B0158 0100 ...
Page 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
Page 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Page 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Page 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Page 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Page 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Page 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Page 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Page 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
Page 1184: ...Section 29 User Break Controller UBC Rev 1 00 Dec 13 2005 Page 1134 of 1286 REJ09B0158 0100 ...
Page 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
Page 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
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