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7477 Datasheet(PDF) 167 Page - Renesas Technology Corp

Part # 7477
Description  8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES
PDF  354 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7477 Datasheet(HTML) 167 Page - Renesas Technology Corp

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7470/7471/7477/7478 GROUP USER’S MANUAL
1-150
HARDWARE
1.15 Reset
_________________________
After the “H” level is applied to the RESET pin, only the main clock oscillates regardless of the oscillation
state precedent to the reset state, so that the microcomputer starts to operate in the ordinary mode. The
XCIN pin and the XCOUT pin become P50 and P51, respectively.
After the reset state is released, the microcomputer runs the program starting with the high-order address
corresponding to the contents of address FFFF16 and the low-order address corresponding to the contents
of address FFFE16.
Note: The 7470/7477 group is not provided with the XCIN and XCOUT pins.
When the “H” level is applied to the RESET pin at the reset state, the contents of timer 3 and timer 4 and
the count source are automatically set as shown in Table 1.15.1, so that the internal reset state is
released by an overflow of timer 4.
Table 1.15.1 Timer 3 and 4 at reset
Item
Setting value
count source
Timer 3
FF16
f(XIN)/16
Timer 4
0716
overflow of
timer 3



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