Fujitsu F2MC-8L F202RA, Hardware Manual

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CHAPTER 4 I/O PORTS
■
Block Diagram of Port 4
Figure 4.4-1 Block Diagram of Port 4
■
Registers of Port 4
The registers PDR4, DDR4, and OUT4 are associated with port 4.
The bits of these registers correspond to the pins of port 4 in one-to-one correspondence.
Table 4.4-2 tabulates the correspondence between the pins and the bits of the port 4 registers.
DDR
Pch
Nch
PDR
OUT
Inter
n
a
l d
a
t
a
bu
s
PDR re a d
PDR re a d
(when re a d-modify-write i s
performed)
O u tp u t l a tch
PDR write
DDR write
S top mode
( S PL = 1)
OUT re a d
OUT write
A/D converter
ch
a nnel s elect
To A/D
converter' s
a n a log inp u t
A/D converter en ab le b it
Pin s
S top mode ( S PL = 1)
DDR re a d
Table 4.4-2 Correspondence between the Pins and the Bits of the Port 4 Register
Port name Bits of associated registers and corresponding pins
Port 4
PDR4, DDR4, OUT4 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
Pin corresponding to bit - - - - P43 P42 P41 P40