HD64F3664FPV Datasheet, PDF (145/446 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 I/O Ports
Section 9 I/O Ports
The group of this LSI has twenty-nine general I/O ports (twenty-seven ports for H8/3664N) and
eight general input-only ports. Port 8 is a large current port, which can drive 20 mA (@V_OL = 1.5
V) when a low level signal is output. Any of these ports can become an input port immediately
after a reset. They can also be used as I/O pins of the on-chip peripheral modules or external
interrupt input pins, and these functions can be switched depending on the register settings. The
registers for selecting these functions can be divided into two types: those included in I/O ports
and those included in each on-chip peripheral module. General I/O ports are comprised of the port
control register for controlling inputs/outputs and the port data register for storing output data and
can select inputs/outputs in bit units. For functions in each port, see appendix B.1, I/O Port Block.
For the execution of bit manipulation instructions to the port control register and port data register,
see section 2.8.3, Bit Manipulation Instruction.
9.1 Port 1
Port 1 is a general I/O port also functioning as IRQ interrupt input pins, a timer A output pin, and
a timer V input pin. Figure 9.1 shows its pin configuration.
Port 1
P17/IRQ3/TRGV
P16/IRQ2
P15/IRQ1
P14/IRQ0
P12
P11
P10/TMOW
Figure 9.1 Port 1 Pin Configuration
Port 1 has the following registers.
• Port mode register 1 (PMR1)
• Port control register 1 (PCR1)
• Port data register 1 (PDR1)
• Port pull-up control register 1 (PUCR1)
Rev. 6.00 Mar. 24, 2006 Page 115 of 412
REJ09B0142-0600