HD64F3664FPV Datasheet, PDF (168/446 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

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. Each pin of the port
B is shown in figure 9.6.
Port B
PB7/AN7
PB6/AN6
PB5/AN5
PB4/AN4
PB3/AN3
PB2/AN2
PB1/AN1
PB0/AN0
Figure 9.6 Port B Pin Configuration
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.
Initial
Bit Bit Name Value R/W Description
7
PB7
6
PB6
5
PB5
4
PB4

R
The input value of each pin is read by reading this

R
register.

R
However, if a port B pin is designated as an analog
input channel by ADCSR in A/D converter, 0 is read.

R
3
PB3

R
2
PB2

R
1
PB1

R
0
PB0

R
Rev. 6.00 Mar. 24, 2006 Page 138 of 412
REJ09B0142-0600