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HD64F36022 Datasheet(PDF) 127 Page - Renesas Technology Corp

Part # HD64F36022
Description  Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
PDF  384 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD64F36022 Datasheet(HTML) 127 Page - Renesas Technology Corp

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Section 9 I/O Ports
Rev. 4.00 Sep. 23, 2005 Page 101 of 354
REJ09B0025-0400
9.2.2
Port Data Register 2 (PDR2)
PDR2 is a general I/O port data register of port 2.
Bit
Bit Name
Initial
Value
R/W
Description
7 to 3
All 1
Reserved
These bits are always read as 1.
2
1
0
P22
P21
P20
0
0
0
R/W
R/W
R/W
PDR2 stores output data for port 2 pins.
If PDR2 is read while PCR2 bits are set to 1, the value
stored in PDR2 is read. If PDR2 is read while PCR2 bits
are cleared to 0, the pin states are read regardless of the
value stored in PDR2.
9.2.3
Pin Functions
The correspondence between the register specification and the port functions is shown below.
• P22/TXD pin
Register
PMR1
PCR2
Bit Name
TXD
PCR22
Pin Function
Setting Value 0
0
P22 input pin
1
P22 output pin
1
X
TXD output pin
Legend X: Don't care.
• P21/RXD pin
Register
SCR3
PCR2
Bit Name
RE
PCR21
Pin Function
Setting Value 0
0
P21 input pin
1
P21 output pin
1
X
RXD input pin
Legend X: Don't care.



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