Port 1 - Fujitsu MB90460 Series Hardware Manual

9.4

Port 1

Port 1 is a general-purpose I/O port. It can also be used for resource I/O. The port pins
can be switched in units of bits between the I/O port and resource. This section
focuses on the general I/O port function. The section provides the configuration of port
1, lists its pins, shows a block diagram of the pins, and describes the corresponding
registers.
■ Port 1 Configuration
Port 1 consists of the following:
• General-purpose I/O pins/external interrupt input pins (P10/INT0/DTT0 to P17/FRCK)
• Port 1 data register (PDR1)
• Port 1 data direction register (DDR1)
• Port 1 pull-up resistor setting register (RDR1)
■ Port 1 Pins
The port 1 pins are also used as resource input pins. The pins cannot be used as output port pins when they
are used as resource input pins. Table 9.4-1 lists the port 1 pins.
Table 9.4-1 Port 1 Pins
Port Pin
P10/INT0/
DTTI0
P11/INT1
P12/INT2/
DTTI1*
P13/INT3
Port 1
P14/INT4
P15/INT5/
TIN0
P16/INT6/
TO0
P17/FRCK
*: Pin names not applicable to MB90465 series
See "1.7 I/O Circuit Types", for information on the circuit types.
Port function
INT0/
P10
DTTI0
P11 INT1
INT2/
P12
DTTI1*
P13 INT3
General-
purpose I/O
P14 INT4
INT5/
P15
TIN0
INT6/
P16
TO0
P17 FRCK
Resource function
External interrupt
input/waveform
generator input
External interrupt
input
External interrupt
input/waveform
sequencer input
External interrupt
input
External interrupt
input/reload timer
input
External interrupt
input/reload timer
output
Free-run timer
clock input
CHAPTER 9 I/O PORT
I/O form
Input Output
CMOS
CMOS
(hysteresis)
Circuit type
C
173