Fujitsu MB90460 Series Hardware Manual page 493

CHAPTER 17 UART
■ Block Diagram of UART Pins
Port data register (PDR)
PDR read
PDR write
Port data direction register (DDR)
DDR write
DDR read
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Figure 17.3-1 Block Diagram of UART Pins
Output latch
Direction latch
Resource output
Resource input
Resource output enable
Standby control (SPL = 1)
Pin