Rev. 1.0, 09/01, page 433 of 904
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/(
2(
2(
2(
2(
,,,,
/(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/
$
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, 4, 5, 6, 7 (EXPE = 1)
OEE
0
1
OES
—
1
0
SDRAM
space
—
—
0
1
*
3
ICE
0
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
P35
input
P35
output
*
1
SCK1
output
*
1
SCK1
output
*
1
SCK1
input
SCL0
I/O
2(
output
CKE
output
Mode 7 (EXPE = 0)
OEE
—
OES
—
SDRAM space
—
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
3. Not used in H8S/2378 series.
Содержание H8S/2376 F-ZTAT
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