Datasheet

Section 9 I/O Ports
Rev. 2.00 Sep. 23, 2005 Page 128 of 444
REJ09B0068-0200
9.8.1 Port Data Register B (PDRB)
PDRB is a general input-only port data register of port B.
Bit Bit Name
Initial
Value R/W Description
7
6
5
4
3
2
1
0
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0








R
R
R
R
R
R
R
R
The input value of each pin is read by reading this
register.
However, if a port B pin is designated as an analog
input channel by ADCSR in A/D converter, 0 is read.