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7477 датащи(PDF) 33 Page - Renesas Technology Corp

номер детали 7477
подробное описание детали  8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES
PDF  354 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7477 датащи(HTML) 33 Page - Renesas Technology Corp

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HARDWARE
1.5 Pin description
7470/7471/7477/7478 GROUP USER’S MANUAL
1-16
Table 1.5.3 Pin description (3)
Name
Input port P5
Pin
P50–P53
Input/
Output
Input
Functions
• Port P5 is a 4-bit input port.
• Pull-up transistor can be connected in units of
4-bit.
• Pins P50, P51 are in common with input/output
pins for sub-clock generating circuit XCIN, XCOUT
respectively.
• When using pins P50 and P51 as pins XCIN and
XCOUT, connect a quartz-crystal oscillator between
pins XCIN and XCOUT.
• When using pins P50 and P51 as pins XCIN and
XCOUT, a feedback resistor is connected between
pins XCIN and XCOUT.
• To use an external clock input, connect the clock
oscillation source to the XCIN pin and leave the
XCOUT pin open.
Note: Only the 7471/7478 group has pins P50–P53.



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