CHAPTER 4 PORT FUNCTIONS
Figure 4-11. Block Diagram of P42
EVDD
WRPU
PU4
P-ch
PU42
WRPF
PF4
PF42
WRPMC
CSI00 output
enable signal
PMC4
PMC42
WRPM
PM4
PM42
EVDD
WRPORT
SCK00 output
P-ch
Output latch
(P42)
P42/SCK00
N-ch
EVSS
Address
CSI00 input
enable signal
SCK00 input
RD
Remark PU4: Pull-up resistor option register 0
PF4: Port 4 function register
PM4: Port 4 mode register
PMC4: Port 4 mode control register
RD:
Port 4 read signal
WR: Port 4 write signal
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