Datasheet

Section 8 I/O Ports
Rev. 6.00 Aug 04, 2006 page 217 of 680
REJ09B0145-0600
Bit n: NMOS open-drain output select (NMODn)
These bits select NMOS open-drain output when pin P2
n
is used as an output pin.
Bit n
NMODn Description
0 CMOS output (initial value)
1 NMOS open-drain output
(n = 7 to 0)
8.3.3 Pin Function
Table 8.6 shows the port 2 pin functions.
Table 8.6 Port 2 Pin Functions
Pin Pin Functions and Selection Method
P2
7
to P2
3
The pin function depends on the corresponding bit in PCR2.
(n = 7 to 3)
PCR2
n
01
Pin function P2
n
input pin P2
n
output pin
P2
2
/SO
1
The pin function depends on bit SO1 in PMR2 and bit PCR2
2
in PCR2.
SO1 0 1
PCR2
2
01 *
Pin function P2
2
input pin P2
2
output pin SO
1
output pin
P2
1
/SI
1
The pin function depends on bit SI1 in PMR2 and bit PCR2
1
in PCR2.
SI1 0 1
PCR2
1
01 *
Pin function P2
1
input pin P2
1
output pin SI
1
input pin
P2
0
/SCK
1
The pin function depends on bit SCK1 in PMR2 and bit PCR2
0
in PCR2.
SCK1 0 1
PCR2
0
01 *
Pin function P2
0
input pin P2
0
output pin SCK
1
I/O pin
*: Don’t care