Port B; Port Data Register B (Pdrb); Figure 9.6 Port B Pin Configuration - Renesas H8 Series Hardware Manual

Section 9 I/O Ports
9.6

Port B

Port B is an input port also functioning as an A/D converter analog input pin and LVD external
comparison voltage input pin. Each pin of the port B is shown in figure 9.6.
Port B has the following register.

• Port data register B (PDRB)

9.6.1 Port Data Register B (PDRB)
PDRB is a general input-only port data register of port B.
Bit Bit Name

7 to 4
3 PB3
2 PB2
1 PB1
0 PB0
Rev. 3.00 Sep. 14, 2006 Page 134 of 408
REJ09B0105-0300
Port B

Figure 9.6 Port B Pin Configuration

Initial
Value R/W Description
 
Reserved

R The input value of each pin is read by reading this
register.

R
However, if a port B pin is designated as an analog input

R
channel by ADCSR in A/D converter or external

R
comparison voltage input pin by LVDCR in low-voltage
detection circuit, 0 is read.
PB3/AN3/ExtU
PB2/AN2/ExtD
PB1/AN1
PB0/AN0