HD6432646 Hitachi, HD6432646 Datasheet - Page 285
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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P5DR is initialized to H'00 if a reset occurs and in the hardware standby mode. The previous
values are retained in the software standby mode.
Port 5 Register (PORT5)
Note: * Determined by state of pins P52 to P50.
PORT5 is an 8-bit read-only register that reflects the states of the pins. It is not possible to write to
it. Always write output data from the port 5 pins (P52 to P50) to P5DR.
If P5DDR is set to 1, the value of P5DR is returned when port 5 is read. If P5DDR is cleared to 0,
the pin states are returned when port 5 is read.
P5DDR and P5DR are initialized if a reset occurs and in the hardware standby mode, so the
content of PORT5 is determined by the pin states. The previous states are retained in the software
standby mode.
9.6.3
Tables 9-10 (1) and 9-10 (2) list the pin functions for port 5. In the H8S/2648, H8S/2648R, and
H8S/2647, port 5 pins also function as SCI I/O pins (TxD2, RxD2, and SCK2).
Table 9-10 (1)
Pin
P52
P51
P50
Bit
Initial value :
R/W
Pin Functions
:
:
Selection Method and Pin Functions
Switches as follows according to the setting of the P52DDR bit.
Switches as follows according to the setting of the P51DDR bit.
Switches as follows according to the setting of the P50DDR bit.
P52DDR
Pin function
P51DDR
Pin function
P50DDR
Pin function
Undefined Undefined Undefined Undefined Undefined
Port 5 Pin Functions (H8S/2646, H8S/2646R, H8S/2645)
—
—
7
—
—
6
P52 input pin
P51 input pin
P50 input pin
—
—
5
0
0
0
—
—
4
—
—
3
P52
—*
2
R
P52 output pin
P51 output pin
P50 output pin
1
1
1
P51
—*
1
R
P50
—*
0
R
251
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