Block Diagram Of I/O Ports (Including The Open-Drain Output And The Pull-Up Resistor) - Fujitsu MB91150 Series Hardware Manual

5.4 Block Diagram of I/O ports (Including the Open-drain
Output and the Pull-up Resistor)
This section provides a block diagram of an I/O port with open-drain output function
and a pull-up resistor.
I Block diagram of I/O port with open-drain output function and pull-up resistor
Figure 5.4-1 "Block diagram of a port including the open-drain output and the pull-up resistor"
shows a block diagram of an I/O port with open-drain output function and a pull-up resistor.
Figure 5.4-1 Block diagram of a port including the open-drain output and the pull-up resistor
Data Bus
PDR read
The ports that have the above function are PH0 to PH5 and PI0 to PI5.
Resource output
Resource output
enabled
CHAPTER 5 I/O PORTS
Resource input
PDR : Port Data Register
DDR : Data Direction Register
ODCR : OpenDrain Control Register
PCR : Pull-up Control Register
pin
153