143
8.3
Port 2 [Chip Internal I/O Port]
8.3.1
Overview
Port 2 is a 5-bit I/O internal port. Figure 8-2 shows its functional configuration.
Port 2 is an internal function that performs interfacing to the FLEX™ decoder incorporated in the
chip. It cannot be connected to an IC outside the chip.
P2
4
P2
3
P2
2
/SO
1
P2
1
/SI
1
P2
0
/SCK
1
Port 2
FLEX™
decoder
RESET
SS
MOSI
MISO
SCK
Note: : Connected inside the chip.
Figure 8-2 Port 2 Functional Configuration
8.3.2
Register Configuration and Description
Table 8-5 shows the port 2 register configuration.
Table 8-5
Port 2 Registers
Name
Abbrev.
R/W
Initial Value
Address
Port data register 2
PDR2
R/W
H'00
H'FFD5
Port control register 2
PCR2
W
H'00
H'FFE5
Port mode register 2
PMR2
R/W
H'D8
H'FFC9
Port mode register 4
PMR4
R/W
H'00
H'FFCB
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