HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 768

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

Table 19.3 Register Configuration
Name
Port B data register
19.3.2
The port B data register (PBDR) is a 16-bit read/write register that stores port B data. Bits
PB15DR to PB0DR correspond to pins PB15 to PB0. When a pin functions as a general output, if
a value is written to PBDR, that value is output directly from the pin, and if PBDR is read, the
register value is returned directly regardless of the pin state. When a pin functions as a general
input, if PBDR is read the pin state, not the register value, is returned directly. If a value is written
to PBDR, although that value is written into PBDR it does not affect the pin state. Table 19.4
shows port B data register read/write operations.
PBDR 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.
Table 19.4 Port B Data Register (PBDR) Read/Write Operations
PBIOR
0
1
758
Initial value:
Initial value:
Port B Data Register (PBDR)
Pin Function
General input
Other than general input
General output
Other than general output
R/W:
R/W:
Bit:
Bit:
PB15DR PB14DR PB13DR PB12DR PB11DR PB10DR PB9DR PB8DR
PB7DR
R/W
R/W
15
0
7
0
Abbreviation
PBDR
PB6DR PB5DR
R/W
R/W
14
0
6
0
Read
Pin state
Pin state
PBDR value
PBDR value
R/W
R/W
R/W
R/W
13
0
5
0
PB4DR PB3DR
Initial Value
H'0000
R/W
R/W
12
0
4
0
Write
Value is written to PBDR, but does not
affect pin state
Value is written to PBDR, but does not
affect pin state
Write value is output from pin
Value is written to PBDR, but does not
affect pin state
R/W
R/W
11
0
3
0
Address
H'FFFFFC8C
PB2DR
R/W
R/W
10
0
2
0
PB1DR PB0DR
R/W
R/W
9
0
1
0
Access Size
8, 16
R/W
R/W
8
0
0
0