HD64F3670 Datasheet, PDF (132/305 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

9.6.1 Port Data Register B(PDRB)
PDRB is a general input-only port data register of port B.
Bit Bit Name Initial Value R/W
7−
−
−
6−
−
−
5−
−
−
4−
−
−
3 PB3
−
R
2 PB2
−
R
1 PB1
−
R
0 PB0
−
R
Description
Reserved
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.
Rev. 1.0, 03/01, page 108 of 280