h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 228
h8s-2649
Manufacturer Part Number
h8s-2649
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2649.pdf
(766 pages)
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Section 9 I/O Ports
9.3.4
P3ODR controls output of port 3.
9.3.5
The correspondence between the register specification and the pin functions is shown below.
• P37/TxD4
The pin function is switched as shown below according to the combination of the TE bit in SCR of
SCI_4 and P37DDR bit.
Note:
• P36/RxD4
The pin function is switched as shown below according to the combination of the RE bit in SCR
of SCI4 and P36DDR bit.
Note:
Rev. 2.00 Dec. 05, 2005 Page 190 of 724
REJ09B0200-0200
Bit
7
6
5
4
3
2
1
0
TE
P37DDR
Pin function
RE
P36DDR
Pin function
*
*
Port 3 Open-Drain Control Register (P3ODR)
Pin Functions
Bit Name
P37ODR
P36ODR
P35ODR
P34ODR
P33ODR
P32ODR
P31ODR
P30ODR
When P37ODR = 1, it becomes NMOS open drain output.
When P36ODR = 1, it becomes NMOS open drain output.
Initial
Value
0
0
0
0
0
0
0
0
P37 input pin
P36 input pin
0
0
R/W
R
R
R
R
R
R
R
R
Description
By setting P3ODR to 1, the port 3 pins become an
NMOS open drain output, and when cleared to 0 they
become CMOS output.
0
0
P37 output pin*
P36 output pin*
1
1
TxD4 output pin
RxD4 input pin
1
1
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