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CHAPTER 4 PORT FUNCTIONS
User’s Manual U15104EJ2V0UD
Figure 4-6. Block Diagram of P33 and P34
PM:
Port mode register
RD:
Port 3 read signal
WR: Port 3 write signal
Figure 4-7. Block Diagram of P36 and P37
PM:
Port mode register
RD:
Port 3 read signal
WR: Port 3 write signal
P33/TI50
P34/TI51
RD
WR
PORT
WR
PM
Alternate function
Output latch
(P33, P34)
PM33, PM34
Internal bus
Selector
WR
PM
WR
PORT
RD
Selector
Output latch
(P36, P37)
PM36, PM37
Internal bus
Alternate function
P36/BEEP0
P37/BUZ