Port 2; Port Control Register 2 (Pcr2); Figure 9.2 Port 2 Pin Configuration - Renesas H8/36912 Series User Manual

9.2

Port 2

Port 2 is a general I/O port also functioning as a SCI3 I/O pin. Each pin of the port 2 is shown in
figure 9.2. The register settings of PMR1 and SCI3 have priority for functions of the pins for both
uses.
Port 2 has the following registers.

• Port control register 2 (PCR2)

• Port data register 2 (PDR2)
9.2.1 Port Control Register 2 (PCR2)
PCR2 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 2.
Bit Bit Name

7 to 3
2 PCR22
1 PCR21
0 PCR20
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Port 2

Figure 9.2 Port 2 Pin Configuration

Initial
Value
R/W Description
 
Reserved
0 W When each of the port 2 pins, P22 to P20, functions as an
general I/O port, setting a PCR2 bit to 1 makes the
0 W
corresponding pin an output port, while clearing the bit to
0 W
0 makes the pin an input port.
P22/TXD
P21/RXD
P20/SCK3
Rev. 1.00, 11/03, page 115 of 376