HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 213

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

8.10
8.10.1
Port B is an 8-bit input-only port, configured as shown in figure 8.9.
8.10.2
Table 8.26 shows the port B register configuration.
Table 8.26 Port B Register
Name
Port data register B
Port Data Register B (PDRB)
Reading PDRB always gives the pin states. However, if a port B pin is selected as an analog input
channel for the A/D converter by AMR bits CH3 to CH0, that pin reads 0 regardless of the input
voltage.
Bit
Read/Write
Port B
Overview
Register Configuration and Description
PB
R
7
7
Figure 8.9 Port B Pin Configuration
PB
R
6
6
Port B
Abbrev.
PDRB
PB
R
5
5
R/W
R
PB
R
4
4
PB /AN
PB /AN
PB /AN
PB /AN
PB /AN
PB /AN
PB /AN
PB /AN
7
6
5
4
3
2
1
0
PB
R
Address
H'FFDD
3
3
7
6
5
4
3
2
1
0
PB
R
2
2
PB
R
1
1
PB
R
0
0
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