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M16C/29 датащи(PDF) 353 Page - Renesas Technology Corp

номер детали M16C/29
подробное описание детали  RENESAS MCU M16C FAMILY / M16C/Tiny SERIES
PDF  499 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M16C/29 датащи(HTML) 353 Page - Renesas Technology Corp

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19. Programmable I/O Ports
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Table 19.1 Unassigned Pin Handling in Single-chip Mode
Figure 19.13 Unassigned Pin Handling
(Input mode)
··
·
(Input mode)
(Output mode)
XOUT
AVCC
AVSS
Vref
MCU
VCC
VSS
In single-chip mode
Open
Open
··
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(1)
Port P0 to P3, P6 to P10
XIN
NOTE:
1. When using the 64-pin package, set bits PACR2, PACR1, and PACR0 to 0102.
When using the 80-pin package, set bits PACR2, PACR1, and PACR0 to 0112.
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NOTES:
1. If the port enters output mode and is left open, it is in input mode before output mode is entered by program
after reset. While the port is in input mode, voltage level on the pins is indeterminate and power consumption
may increase. Direction register setting may be changed by noise or failure caused by noise. Configure
direction register settings regulary to increase the reliability of the program.
2. Use the shortest possible wiring to connect the MCU pins to unassigned pins (within 2 cm).
3. When the external clock is applied to the XIN pin, set the pin as written above.
4. In the 64-pin package, set bits PACR2, PACR1, and PACR0 in the PACR register to 0102. In the 80-pin
package, set bits PACR2, PACR1, and PACR0 to 0112.
5. When the main clock oscillation is not used, set the CM05 bit in the CM0 register to 1 (main clock stops) to
reduce power consumption.



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