
CHAPTER 4 PORT FUNCTIONS
User’s Manual U15905EJ2V1UD
160
(3) Block diagram
Figure 4-30. Block Diagram of PCT0, PCT1, PCT4, and PCT6
Internal
bus
WRPMC
RD
Address
WR0, WR1,
RD, ASTB output
WRPORT
PCT0/WR0,
PCT1/WR1,
PCT4/RD,
PCT6/ASTB
PMCCTn
Output latch
(PCTn)
PCT
Selector
WRPM
PMCTn
PMCCT
PMCT
Remarks 1. PCT:
Port register CT
PMCT:
Port mode register CT
PMCCT: Port mode control register CT
2. n = 0, 1, 4, or 6