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CHAPTER 5 I/O Port
■ Registers for Port 4, 8, 9
●
Port 4, 8, 9 data register (PDR4, 8, 9)
Figure 5.7-2 Port 4 data register (PDR4)
Figure 5.7-3 Port 8 data register (PDR8)
Figure 5.7-4 Port 9 data register (PDR9)
●
Port 4, 8, 9 direction register (DDR4, 8, 9)
Figure 5.7-5 Port 4 direction register (DDR4)
Figure 5.7-6 Port 8 direction register (DDR8)
Figure 5.7-7 Port 9 direction register (DDR9)
●
Port 4, 8, 9 function selection register (PFS4, 8, 9)
Figure 5.7-8 Port 4 function selection register (PFS4)
7 6 5 4 3 2 1 0
XXXX XXXX
B
Initial value
bit
R/W R/W R/W R/W R/W R/W R/W R/W
PD47
PD46 PD45 PD44 PD43 PD42 PD41 PD40
Access
Address: 000007
H
7 6 5 4 3 2 1 0
XXXX XXXX
B
Initial value
bit
R/W R/W R/W R/W R/W R/W R/W R/W
PD87 PD86 PD85 PD84 PD83 PD82 PD81 PD80
Access
Address: 000013
H
7 6 5 4 3 2 1 0
---X XXXX
B
Initial value
bit
R/W R/W R/W R/W R/W R/W R/W R/W
PD94 PD93 PD92 PD91 PD90
Access
Address: 000012
H
7 6 5 4 3 2 1 0
0000 0000
B
Initial value
bit
WWWWWWWW
DR47 DR46 DR45 DR44 DR43 DR42 DR41 DR40
Access
Address: 00000F
H
7 6 5 4 3 2 1 0
0000 0000
B
Initial value
bit
WWWWWWWW
DR87 DR86 DR85 DR84 DR83 DR82 DR81 DR80
Access
Address: 00001B
H
7 6 5 4 3 2 1 0
---0 0000
B
Initial value
bit
WWWWWWWW
DR94 DR93 DR92 DR91 DR90
Access
Address: 00001A
H
7 6 5 4 3 2 1 0
0000 0000
B
Initial value
bit
WWWWWWWW
PG18E PG17E PG16E PG15E PG14E PG13E PG12E
Access
Address: 000607
H