Port 3 - Fujitsu MB90460 Series Hardware Manual

9.6

Port 3

Port 3 is a general-purpose I/O port. It can also be used for resource output. 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. It provides the configuration of port 3, lists its
pins, shows a block diagram of the pins, and describes the corresponding registers.
■ Port 3 Configuration
Port 3 consists of the following:
• General-purpose I/O pins/resource I/O pins (P30/RTO0 to P37/PPG0)
• Port 3 data register (PDR3)
• Port 3 data direction register (DDR3)
■ Port 3 Pins
The port 3 I/O pins are also used as resource output pins. Therefore, the pins cannot be used as general-
purpose I/O port pins when they are used as resource I/O pins. Table 9.6-1 lists the port 3 pins.
Table 9.6-1 Port 3 Pins
Port Pin
P30/RTO0*
P31/RTO1*
P32/RTO2*
P33/RTO3*
Port 3
P34/RTO4*
P35/RTO5*
P36/PPG1*
P37/PPG0
*: Pin names not applicable to MB90465 series
See "1.7 I/O Circuit Types", for information on the circuit types.
Port function
(single-chip mode)
P30 RTO0*
P31 RTO1*
P32 RTO2*
General-
P33 RTO3*
purpose I/O
P34 RTO4*
P35 RTO5*
P36 PPG1*
P37 PPG0
Resource function
Waveform generator
output 0
Waveform generator
output 1
Waveform generator
output 2
Waveform generator
output 3
Waveform generator
output 4
Waveform generator
output 5
PPG1 output
PPG0 output
CHAPTER 9 I/O PORT
I/O form
Circuit
type
Input Output
G
CMOS CMOS
H
183