Datasheet

Section 9 I/O Ports
Rev.6.00 Mar. 18, 2009 Page 351 of 980
REJ09B0050-0600
9.3.6 Pin Functions
Port 3 pins also function as the pins for SCI I/Os, I
2
C output, and a bus control signal output. The
correspondence between the register specification and the pin functions is shown below.
• P35/SCK1/SCL0/(OE)
The pin function is switched as shown below according to the combination of the ICE bit in
ICCRA of I
2
C_0, C/A bit in SMR of SCI_1, bits CKE0 and CKE1 in SCR, bits OEE in
DRAMCR, bit OES in PFCR2, and bit P35DDR.
Modes 1, 2, 4, 7 (EXPE = 1)
OEE 0 1
OES — 1 0
ICE — 1 0 1 —
CKE1 0 1 — 0 1 — —
C/A 0 1 — — 0 1 — — —
CKE0 0 1 — — — 0 1 — — — —
P35DDR 0 1 — — — — 0 1 — — — — —
Pin
function
P35
input
P35
output
*
1
SCK1
output
*
1
SCK1
output
*
1
SCK1
input
SCL0
I/O
*
2
P35
input
P35
output
*
1
SCK1
output
*
1
SCK1
output
*
1
SCK1
input
SCL0
I/O
*
2
OE output
Mode 7 (EXPE = 0)
OEE —
OES —
ICE 0 1
CKE1 0 1 —
C/A 0 1 — —
CKE0 0 1 — — —
P35DDR 0 1 — — — —
Pin function P35
input
P35
output
*
1
SCK1
output
*
1
SCK1
output
*
1
SCK1
input
SCL0
I/O
*
2
Notes: 1. NMOS open-drain output when P35ODR = 1.
2. NMOS open-drain output regardless of P35ODR