81
CHAPTER 4 PORT FUNCTIONS
User’s Manual U15104EJ2V0UD
Figure 4-17. Block Diagram of P121 and P124
PM: Port mode register
RD: Port 12 read signal
WR: Port 12 write signal
Figure 4-18. Block Diagram of P122 and P125
PM: Port mode register
RD: Port 12 read signal
WR: Port 12 write signal
WR
PM
WR
PORT
RD
Selector
Output latch
(P121, P124)
PM121, PM124
Internal bus
Alternate function
P121/SO32
P124/SO321
P122/SCK32
P125/SCK321
RD
WR
PORT
WR
PM
Alternate function
Output latch
(P122, P125)
PM122, PM125
Alternate function
Selector
Internal bus
Содержание mPD178053
Страница 2: ...2 User s Manual U15104EJ2V0UD MEMO ...