
CHAPTER 4 PORT FUNCTIONS
User’s Manual U15905EJ2V1UD
165
(3) Block diagram
Figure 4-32. Block Diagram of PDH0 to PDH7
WRPMC
RD
WRPORT
PDH0/A16 to
PDH7/A23
PMCDHn
WRPM
PMDHn
Output latch
(PDHn)
PMCDH
PDH
PMDH
A16 to A23 output
Internal
bus
Address
Selector
Output buffer off signal
Remarks 1. PDH:
Port register DH
PMDH:
Port mode register DH
PMCDH: Port mode control register DH
PUDH:
Pull-up resistor option register DH
Output buffer off signal: Signal that is active in IDLE/STOP mode
2. n = 0 to 7