Block Diagram; Figure 8.2A Block Diagram Of I/O Port; Figure 8.2B Block Diagram Of Input Resistor Register; Figure 8.2C Block Diagram Of Output Pin Register - Fujitsu F2MC-16LX MB90580 Series Hardware Manual

8.2 Block Diagram

8.2 Block Diagram
Internal data bus
Internal data bus
Internal data bus
102 Chapter 8: Parallel Ports
Data register read
Data register
Data register write
Direction register
Direction register write
Direction register read

Figure 8.2a Block diagram of I/O port

Data register
Direction register
Resistor register

Figure 8.2b Block diagram of input resistor register

Data register
Direction register
Pin register

Figure 8.2c Block diagram of Output pin register

Pin
Pull-up resistor (about 50 kΩ)
Pin
Pin
MB90580 Series