HD6473032F Datasheet, PDF (143/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

Port 2 Data Register (P2DR): P2DR is an 8-bit readable/writable register that stores data for pins
P2₇ to P2₀.
Bit
Initial value
Read/Write
7
P2 ₇
0
R/W
6
P2 ₆
0
R/W
5
P2 ₅
0
R/W
4
P2 ₄
0
R/W
3
P2 ₃
0
R/W
2
P2 ₂
0
R/W
1
P2 ₁
0
R/W
0
P2 ₀
0
R/W
Port 2 data 7 to 0
These bits store data for port 2 pins
When a bit in P2DDR is set to 1, if port 2 is read the value of the corresponding P2DR bit is
returned directly, regardless of the actual state of the pin. When a bit in P2DDR is cleared to 0, if
port 2 is read the corresponding pin level is read.
P2DR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
Port 2 Input Pull-Up Control Register (P2PCR): P2PCR is an 8-bit readable/writable register
that controls the MOS input pull-up transistors in port 2.
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
P2₇PCR P2₆PCR P2₅PCR P2₄PCR P2₃PCR P2₂PCR P2₁PCR P2₀PCR
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Port 2 input pull-up control 7 to 0
These bits control input pull-up
transistors built into port 2
When a P2DDR bit is cleared to 0 (selecting generic input), if the corresponding bit from P2₇PCR
to P2₀PCR is set to 1, the input pull-up transistor is turned on.
P2PCR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
7.3.3 Pin Functions in Each Mode
The pin functions of port 2 differ between mode 1 and modes 2 and 3. The pin functions in each
mode are described below.
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