
CHAPTER 4 PORT FUNCTIONS
User’s Manual U15905EJ2V1UD
155
(3) Block diagram
Figure 4-28. Block Diagram of PCS0 to PCS3
Internal
bus
WRPMC
RD
Address
CS0 to CS3 output
WRPORT
PCS0/CS0 to
PCS3/CS3
PMCCSn
Output latch
(PCSn)
PCS
Selector
WRPM
PMCSn
PMCCS
PMCS
Remarks 1. PCS:
Port register CS
PMCS:
Port mode register CS
PMCCS: Port mode control register CS
2. n = 0 to 3