Port Data Register 2 (Pdr2); Pin Functions - Renesas H8/36912 Series User Manual

9.2.2

Port Data Register 2 (PDR2)

PDR2 is a general I/O port data register of port 2.
Bit Bit Name

7 to 3
2 P22
1 P21
0 P20
9.2.3

Pin Functions

The correspondence between the register specification and the port functions is shown below.
• P22/TXD pin
Register PMR1
Bit Name TXD
Setting 0
value
1
[Legend]
X: Don't care
• P21/RXD pin
Register SCR3
Bit Name RE
Setting 0
value
1
[Legend]
X: Don't care
Rev. 1.00, 11/03, page 116 of 376
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Initial
Value R/W Description

All 1 Reserved
These bits are always read as 1.
0 R/W These bits store output data for port 2 pins.
0 R/W 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
0 R/W
are cleared to 0, the pin states are read regardless of the
value stored in PDR2.
PCR2
PCR22 Pin Function
0 P22 input pin
1 P22 output pin
X TXD output pin
PCR2
PCR21 Pin Function
0 P21 input pin
1 P21 output pin
X RXD input pin