Datasheet

Section 10 I/O Ports
R01UH0309EJ0500 Rev. 5.00 Page 589 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
10.7.2 Port 8 Data Register (P8DR)
P8DR stores output data for the port 8 pins.
Bit Bit Name Initial Value R/W Description
7, 6 ⎯ All 0 ⎯ Reserved
These bits are always read as 0 and cannot be
modified.
5 P85DR 0 R/W
4 P84DR 0 R/W
3 P83DR 0 R/W
2 P82DR 0 R/W
1 P81DR 0 R/W
0 P80DR 0 R/W
Output data for a pin is stored when the pin function
is specified as a general purpose I/O.
Bits 4, 2, and 0 are reserved in the H8S/2454
Group.
10.7.3 Port 8 Register (PORT8)
PORT8 shows the pin states of port 8. PORT8 cannot be modified.
Bit Bit Name Initial Value R/W Description
7, 6 ⎯ Undefined ⎯ Reserved
If these bits are read, they will return an undefined
value.
5 P85 ⎯* R
4 P84 ⎯* R
3 P83 ⎯* R
2 P82 ⎯* R
1 P81 ⎯* R
0 P80 ⎯* R
If this register is read while a P8DDR bit is set to 1,
the corresponding P8DR value is read. If this
register is read while a P8DDR bit is cleared to 0,
the corresponding pin state is read.
Bits 4, 2, and 0 are reserved in the H8S/2454
Group.
Note: * Determined by the states of pins P85 to P80.