HD64F3694FXV Datasheet, PDF (141/452 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 I/O Ports
9.1.2 Port Control Register 1 (PCR1)
PCR1 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 1.
Initial
Bit
Bit Name Value R/W Description
7
PCR17 0
6
PCR16 0
5
PCR15 0
4
PCR14 0
3


W
When the corresponding pin is designated in PMR1 as a
W
general I/O pin, setting a PCR1 bit to 1 makes the
corresponding pin an output port, while clearing the bit to
W
0 makes the pin an input port.
W
Bit 3 is a reserved bit.

2
PCR12 0
W
1
PCR11 0
W
0
PCR10 0
W
9.1.3 Port Data Register 1 (PDR1)
PDR1 is a general I/O port data register of port 1.
Initial
Bit
Bit Name Value R/W Description
7
P17
0
R/W PDR1 stores output data for port 1 pins.
6
P16
0
5
P15
0
4
P14
0
3

1
2
P12
0
R/W If PDR1 is read while PCR1 bits are set to 1, the value
R/W ^{stored in PDR1 are read. If PDR1 is read while PCR1 bits}
are cleared to 0, the pin states are read regardless of the
R/W _{value stored in PDR1.}

Bit 3 is a reserved bit. This bit is always read as 1.
R/W
1
P11
0
R/W
0
P10
0
R/W
Rev.5.00 Nov. 02, 2005 Page 111 of 418
REJ09B0028-0500