Port 3; Table 8-11 Pins Of Port 3 - Fujitsu MB90420/5 (A) Series Hardware Manual

MB90420/5 (A) SERIES F

8.5 Port 3

Port 3 is a general-purpose I/O port that serves both as a resource input and output. Each pin can be
switched between the resource and the port by the bit. The function as a general-purpose I/O port is mainly
explained here. The configuration, pins, block diagram of the pins, and registers for port 3 are shown below.
n Configuration of port 3
Port 3 consists of the following three elements:
• General-purpose I/O pins, resource I/O pins (P36/SEG12 to P37/SEG13)
• Port 3 data register (PDR3)
• Port 3 direction register (DDR3)
n Pins of port 3
The pins of the port 3 also serve as resource I/O pins, so when using a pin of port 3 as a resource I/O pin, it
cannot be used as a general-purpose I/O port. Table 8-11 shows the pins of port 3.
Port Name Pin Name
Port 3
P36/SEG12
P37/SEG13
For the circuit type, see Section 1.7.
2
MC-16LX FAMILY 16-BIT MICROCONTROLLERS HARDWARE MANUAL

Table 8-11 Pins of Port 3

Port Function
P36 SEG12
General-
purpose I/O
P37 SEG13
Resource
LCDC
(hysteresis)
8-16
I/O Type
Input Output
CMOS
CMOS
Circuit
Type
E