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CHAPTER 5 PORT FUNCTIONS
User’s Manual U15109EJ3V0UD
159
(3) Block diagram (ports 4 and 5)
Figure 5-8. Block Diagram of P40 to P47 and P50 to P57
WR
PM
WR
PORT
RD
Selector
Output latch
(Pmn)
PMmn
PMm
Internal bus
Pmn/ADx
Remarks 1.
PMm: Port m mode register
RD:
Port m read signal
WR:
Port m write signal
2.
m = 4, 5
n = 0 to 7
x = 0 to 15