h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 291

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Table 8.20 Port 9 Pin Functions
Pin
P97/WAIT/SDA0
P96/ /EXCL
P95/AS/IOS/CS1
Selection Method and Pin Functions
The pin function is switched as shown below according to the combination of
operating mode, bit WMS1 in WSCR, bit ICE in ICCR of IIC0, and bit P97DDR.
In the H8S/2138 Group, when this pin is set as the P97 output pin, it is an
NMOS push-pull output. SDA0 is an NMOS open-drain output, and has direct
bus drive capability.
The pin function is switched as shown below according to the combination of
bit EXCLE in LPWRCR and bit P96DDR.
When this pin is used as the EXCL input pin, P96DDR should be cleared to 0.
The pin function is switched as shown below according to the combination of
operating mode, bit IOSE in SYSCR, bit HI12E in SYSCR2, and bit P95DDR.
Operating
mode
WMS1
ICE
P97DDR
Pin function
P96DDR
EXCLE
Pin function
Operating
mode
HI12E
P95DDR
IOSE
Pin function
output pin
input
P97
pin
0
P96 input pin
AS
Modes 1, 2, 3 (EXPE = 1)
0
Modes 1, 2, 3
(EXPE = 1)
0
0
output
P97
—
—
pin
0
1
output pin
IOS
1
I/O pin
SDA0
0
—
1
Rev. 4.00 Jun 06, 2006 page 237 of 1004
EXCL input pin
input pin
WAIT
input
P95
pin
—
—
—
1
1
0
Modes 2, 3 (EXPE = 0)
0
input
Modes 2, 3 (EXPE = 0)
P97
pin
output pin
0
P95
—
1
Section 8 I/O Ports
0
REJ09B0301-0400
output
P97
pin
—
output pin
1
1
0
input pin
CS1
I/O pin
SDA0
—
—
1
—
1