Datasheet

Section 10 I/O Ports
Rev.7.00 Mar. 18, 2009 page 486 of 1136
REJ09B0109-0700
10.3.6 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)/(CKE
*
3
)
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 and
RMTS2 to RMTS0 in DRAMCR, bit OES in PFCR2, and bit P35DDR.
Modes 1, 2, 4, 7 (EXPE = 1)
OEE 0 1
OES ⎯ 1 0
SDRAM
space
⎯ ⎯ Normal
or
DRAM
space
continu-
ous
SDRAM
space
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
CKE
output