Table 4.4A Port 3 Pin; Port 3 - Fujitsu F2MC-8L MB89620 Series Hardware Manual

4
4.

Port 3

Port 3 is a general-purpose I/O port that also serves as peripheral I/O. Each pin can be
switched between peripheral and port operation in bit units. This section principally
describes the port functions when operating as a general-purpose I/O port.
The section describes the port structure and pins, the pin block diagram, and the port
registers for port 3.
n Structure of Port 3
Port 3 consist of the following three components:
• General-purpose I/O pins/peripheral I/O pins (P30/ADST to P37/PTO)
• Port 3 data register (PDR3)
• Port 3 data direction register (DDR3)
n Port 3 Pins
Port 3 consists of eight I/O pins of a hysteresis input and CMOS output type.
As the I/O pins also serve as peripheral I/O, the pins cannot be used as general-purpose I/O
ports when the corresponding peripheral is used.
Table 4.4a lists the port 3 pins.

Table 4.4a Port 3 Pin

Port
Port 3
*: Also serves as the clock monitor output in the MB89628R, MB89629R, and MB89P629. (P30/ADST/CLKO)
Reference: See Section 1.7, "I/O Pins and Pin Functions" for a description of the circuit type.
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CHAPTER 4 I/O PORTS
Pin name Function
*
P30 General-purpose I/O
P30/ADST
P31/SCK1
P31 General-purpose I/O
P32/SO1
P32 General-purpose I/O
P33/SI1
P33 General-purpose I/O
P34/EC
P34 General-purpose I/O
P35/PWC P35 General-purpose I/O
P36/WTO
P36 General-purpose I/O
P37/PTO
P37 General-purpose I/O
Shared peripheral
ADST External clock input for the A/D
converter activation
SCK1 Clock I/O for 8-bit serial I/O-1
SO1 Data output for 8-bit serial I/O-1
SI1 Data input for 8-bit serial I/O-1
EC Pulse input for the 16-bit timer/
counter
PWC Pulse input for the pulse width
count timer
WTO Timer output for the pulse width
count timer
PTO Timer output for the 8-bit PWM
timer
I/O type
Circuit
type
Input Output
CMOS E
Hysteresis
MB89620 series