p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 211

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

8.5.3
• P52/SCK0/SCL0
Note: When this pin is used as the SCL0 I/O pin, bits CKE1 and CKE0 in SCR of SCI0 and bit C/A
• P51/RxD0
• P50/TxD0
ICE
CKE1
C/A
CKE0
P52DDR
Pin Function
RE
P51DDR
Pin Function
TE
P50DDR
Pin Function
The pin function is switched as shown below according to the combination of the CKE1 and
CKE0 bits in SCR of SCI_0, the C/A bit in SMR of SCI_0, the ICE bit in ICCR of IIC_0, and
the P52DDR bit.
The pin function is switched as shown below according to the combination of the RE bit in
SCR of SCI_0 and the P51DDR bit.
The pin function is switched as shown below according to the combination of the TE bit in
SCR of SCI_0 and the P50DDR bit.
in SMR of SCI0 must all be cleared to 0.
SCL0 is an NMOS open-drain output, and has direct bus drive capability.
When set as the P52 output pin or SCK0 output pin, this pin is an NMOS push-pull output.
Pin Functions
input pin
P52
0
P51 input pin
P50 input pin
0
0
0
output pin
P52
0
1
0
0
0
SCK0 output
pin
—
0
1
P51 output pin
P50 output pin
1
1
SCK0 output
Rev. 1.00 Sep. 21, 2006 Page 173 of 658
pin
—
—
1
input pin
SCK0
—
—
—
TxD0 output pin
1
RxD0 input pin
Section 8 I/O Ports
REJ09B0310-0100
—
—
1
1
I/O pin
SCL0
—
1
0
0
0