HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 757

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

Bit 1—PA1 Mode Bit (PA1MD): Selects the function of pin PA1/EXOUT.
Bit 1: PA1MD
0
1
Bit 0—PA0 Mode Bit (PA0MD): Selects the function of pin PA0.
Bit 0: PA0MD
0
1
18.3.2
The port A I/O register (PAIOR) is a 16-bit read/write register that selects the input/output
direction of the 14 multiplex pins in port A. Bits PA13IOR to PA4IOR and PA2IOR to PA0IOR
correspond to individual pins in port A. PAIOR is enabled when port A pins function as general
input pins (PA13 to PA4 and PA2 to PA0), and disabled otherwise. When port A pins function as
PA13 to PA0, a pin becomes an output when the corresponding bit in PAIOR is set to 1, and an
input when the bit is cleared to 0.
PAIOR is initialized to H'0000 by a power-on reset. It is not initialized by a manual reset or in
standby mode or sleep mode.
746
Initial value:
Initial value:
Port A I/O Register (PAIOR)
R/W:
R/W:
Bit:
Bit:
PA7IOR PA6IOR PA5IOR PA4IOR
Description
General input/output (PA1)
EtherC general external output (EXOUT)
Description
General input/output (PA0)
Reserved
R/W
15
—
0
R
7
0
R/W
14
—
0
R
6
0
PA13IOR PA12IOR PA11IOR PA10IOR PA9IOR PA8IOR
R/W
R/W
13
0
5
0
R/W
R/W
12
0
4
0
R/W
11
—
0
3
0
R
PA2IOR PA1IOR PA0IOR
R/W
R/W
10
0
2
0
R/W
R/W
9
0
1
0
(Initial value)
(Initial value)
R/W
R/W
8
0
0
0