Overview Of I/O Ports - Fujitsu MB90895 Series Hardware Manual

CHAPTER 4 I/O PORT
4.1

Overview of I/O Ports

I/O ports can be used as general-purpose I/O ports (parallel I/O ports). In MB90895
series, there are five ports (34 pins).
Each port pin also serves as a peripheral I/O pins.
I I/O Port Function
The I/O ports enable the port data register (PDR) to output data to the I/O pins from the CPU and fetch
signals input to the I/O pins.These also enable the port direction register (DDR) to set a direction for the I/
O pins by bit.
The following shows the function of each port, and the peripherals that it also serves as:
• Port 1: Serves as both general-purpose I/O port and PPG timer output, or input capture input
• Port 2: Serves as both general-purpose I/O port and reload timer I/O, or external interrupt input
• Port 3: Serves as both general-purpose I/O port or A/D converter start trigger pin
• Port 4: Serves as both general-purpose I/O port and UART1 I/O or CAN controller transmit/receive pin
• Port 5: Serves as both general-purpose I/O port and analog input pin
Table 4.1-1 List of Each Port Functions
Port Name Pin Name Input Type
P10/IN0 to
P13/IN3
port 1
P14/PPG0 to
P17/PPG3
P20/TIN0 to
port 2 CMOS
P27/INT7
(hysteresis)
/Automotive
P30/SOT0 to
/CMOS*
port 3 P33, P35/X0A
to P37/ADTG
P40/SIN1 to
Port 4
P44/RX
Analog/CMOS
P50/AN0 to
(hysteresis)
Port 5
P57/AN7
*1:Only P32/SIN, P40/SIN1
*2:If the low-speed oscillation pin is selected (for MB90F897), P35 and P36 pins cannot be used.
Note: When using these ports as general-purpose ports, always set each bit of the analog input
enable register (ADER) corresponding to each pin of the ports to "0".ADER bit is "1" at a
reset.
160
Output Type Function
General-purpose I/
CMOS
O ports
CMOS high
Resource
current
General-purpose I/
O ports
Resource
General-purpose I/
1
O ports
Resource
CMOS
General-purpose I/
O ports
Resource
General-purpose I/
O ports
Analog input pin
bit7 bit6 bit5
P17 P16 P15
PPG3 PPG2 PPG1
P27 P26 P25
INT7 INT6 INT5
2 2
P37
P36* /X1A P35* /X0A
− −
ADTG
− − −
− − −
P57 P56 P55
AN7 AN6 AN5
bit4 bit3 bit2 bit1
P14 P13 P12 P11
PPG0 IN3 IN2 IN1
P24 P23 P22 P21
INT4 INT3 INT2 INT1
−
P33 P32 P31
− −
SIN0 SCK0
P44 P43 P42 P41
RX TX SOT1 SCK1
P54 P53 P52 P51
AN4 AN3 AN2 AN1
bit0
P10
IN0
P20
INT0
P30
SOT0
P40
SIN1
P50
AN0