r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 683
r4f2456
Manufacturer Part Number
r4f2456
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R4F2456.pdf
(1376 pages)
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10.17.3 Port J Register (PORTJ)
PORTJ shows the pin states of port J. PORTJ cannot be modified.
Note:
10.17.4 Port J Open Drain Control Register (PJODR)
PJODR specifies the output type of each port J pin.
Bit
7 to 3
2
1
0
Bit
7 to 2
1
0
*
Bit Name
PJ1ODR
PJ0ODR
Bit Name
PJ2
PJ1
PJ0
Determined by the state of pins PJ0 to PJ2.
Undefined
*
*
*
All 0
0
0
Initial Value
Initial Value
R/W
R
R
R
R/W
R/W
R/W
Description
Reserved
If these bits are read, they will return an undefined
value.
The pin state is always read from this register. Bit 2
is reserved for the 145-pin version.
If this register is read, the PJDR values are read for
the bits with the corresponding PJDDR bits set to 1.
For the bits with the corresponding PJDDR bits
cleared to 0, the pin states are read.
Description
Reserved
These bits are always read as 0. Only the initial
values should be written to these bits.
Setting a PJODR bit to 1 makes the corresponding
pin an NMOS open-drain output pin, while clearing
a PJODR bit to 0 makes the corresponding pin a
CMOS output pin.
Rev. 1.00 Sep. 19, 2008 Page 653 of 1342
Section 10 I/O Ports
REJ09B0467-0100
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