Datasheet

Section 10 I/O Ports
Rev. 3.00 Mar 17, 2006 page 458 of 926
REJ09B0283-0300
10.3.6 Pin Functions
Port 3 pins also function as SCI I/Os and a bus control signal output. The correspondence between
the register specification and the pin functions is shown below.
• P35/SCK1/OE/CKE
The pin function is switched as shown below according to the combination of the C/A bit in
SMR of SCI_1, bits CKE0 and CKE1 in SCR, bits RMTS2 to RMTS0 in DRAMCR, bit OES
in PFCR2, and bit P35DDR.
Modes 1, 2, 3 (EXPE = 1), 4, 5, 6, 7 (EXPE = 1), H8S/2678R Group
OEE 0 1
OES — 1 0
Area
2 to 5
——Normal
space
or
DRAM
space
Con-
tinuous
synch-
ronous
DRAM
space
CKE1 0101——
C/A 0 1 — 0 1 ———
CKE0 0 1 —— 0 1 ————
P35DDR0 1 ——— 0 1 —————
Pin
function
P35
input
P35
output
*
SCK1
output
*
SCK1
output
*
SCK1
input
P35
input
P35
output
*
SCK1
output
*
SCK1
output
*
SCK1
input
OE
output
CKE
output
Modes 1, 2, 4, 5, 6, 7 (EXPE = 1), H8S/2678 Group
OEE 0 1
OES — 1 0
CKE1 0101—
C/A 01—01——
CKE0 0 1 —— 0 1 ———
P35DDR0 1 ——— 0 1 ————
Pin
function
P35
input
P35
output
*
SCK1
output
*
SCK1
output
*
SCK1
input
P35
input
P35
output
*
SCK1
output
*
SCK1
output
*
SCK1
input
OE
output
Note: * NMOS open-drain output when P35ODR = 1.