HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 187

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

8.3
8.3.1
Port 2 is a 3-bit I/O port, configured as shown in figure 8.2.
8.3.2
Table 8.5 shows the port 2 register configuration.
Table 8.5
Name
Port data register 2
Port control register 2
Port Data Register 2 (PDR2)
Note: * Bits 7 to 3 are reserved; they are always read as 0 and cannot be modified.
PDR2 is an 8-bit register that stores data for port 2 pins P2
bits are set to 1, the values stored in PDR2 are read, regardless of the actual pin states. If port 2 is
read while PCR2 bits are cleared to 0, the pin states are read.
Upon reset, PDR2 is initialized to H'00.
Bit
Initial value
Read/Write
Port 2
Overview
Register Configuration and Description
Port 2 Registers
—
0*
—
7
Figure 8.2 Port 2 Pin Configuration
—
0*
—
6
Port 2
Abbrev.
PDR2
PCR2
—
0*
—
5
R/W
R/W
W
—
0*
—
4
P2 /TXD
P2 /RXD
P2 /SCK
2
2
1
0
to P2
—
0*
—
Initial Value
H'00
H'00
3
0
. If port 2 is read while PCR2
3
R/W
P2
2
0
2
R/W
P2
Address
H'FFD5
H'FFE5
1
0
1
R/W
P2
0
0
0
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