HD6432646 Hitachi, HD6432646 Datasheet - Page 325

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Port J Register (PORTJ)
Note: * Determined by the state of PJ7 to PJ0.
PORTJ is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port J pins (PJ7 to PJ0) must always be performed on PJDR.
If a port J read is performed while PJDDR bits are set to 1, the PJDR values are read. If a port J
read is performed while PJDDR bits are cleared to 0, the pin states are read.
After a reset and in hardware standby mode, PORTJ contents are determined by the pin states, as
PJDDR and PJDR are initialized. PORTJ retains its prior state in software standby mode.
9.15.3
As shown in table 9-33, the port J pin functions can be switched, bit by bit, by changing the values
of OE2A to OE2H of motor control PWM timer PWOCR2 and PJDDR.
Table 9-33 Port J Pin Functions
OE2A to OE2H
PJDDR
Pin function
Bit
Initial value :
R/W
Pin Functions
:
:
PJ7
—*
7
R
1
—
Motor control PWM
timer output
PJ6
—*
6
R
PJ5
—*
5
R
0
0
PJ7 to PJ0 input
PJ4
—*
4
R
PJ3
—*
3
R
PJ2
—*
2
R
1
PJ7 to PJ0 output
PJ1
—*
1
R
PJ0
—*
0
R
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