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R28 Datasheet(PDF) 74 Page - Renesas Technology Corp

Part # R28
Description  RENESAS 16-BIT SINGLE-CHIP MCU R8C FAMILY / R8C/2x SERIES
PDF  473 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R28 Datasheet(HTML) 74 Page - Renesas Technology Corp

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R8C/28 Group, R8C/29 Group
7. Programmable I/O Ports
Rev.2.10
Sep 26, 2008
Page 55 of 441
REJ09B0279-0210
Figure 7.4
Configuration of Programmable I/O Ports (4)
P4_2/VREF
Data bus
(Note 1)
(Note 1)
P4_5
Direction
register
Data bus
Pull-up selection
Input to individual peripheral function
1
Output from individual peripheral function
Input to external interrupt
Digital
filter
(Note 1)
(Note 1)
P4_6/XIN
Data bus
P4_7/XOUT
Data bus
(Note 2)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
CM05
CM11
CM13
01
CM01
01
CM01
RfXIN
XIN
oscillation
circuit
CM12
RfXCIN
XCIN
oscillation
circuit
CM04
Port latch
P4_6/XIN
Data bus
P4_7/XOUT
Data bus
(Note 2)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
CM05
CM11
CM13
RfXIN
XIN
oscillation
circuit
2. This pin is pulled up in one of the following conditions:
• CM01 = CM05 = CM13 = 1
• CM01 = CM04 = 1
• CM01 = CM10 = CM13 = 1
• CM01 = CM10 = CM04 = 1
CM01, CM04, CM05: Bits in CM0 register
CM10, CM13: Bits in CM1 register
NOTES:
1.
symbolizes a parasitic diode.
Ensure the input voltage to each port does not exceed VCC.
(N, D Version)
(J, K Version)



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