Pin Functions; Pin States - Renesas H8 Series Hardware Manual

Section 8 I/O Ports
Port Data Register B (PDRB)
Bit
PB
Read/Write R
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.
8.10.3

Pin Functions

Table 8.27 shows the port B pin functions.
Table 8.27 Port B Pin Functions
Pin Pin Functions and Selection Method
PB /AN Always as below.
n n
Pin function
8.10.4

Pin States

Table 8.28 shows the port B pin states in each operating mode.
Table 8.28 Port B Pin States
Pins Reset
PB /AN High-
n n
impedance
Rev. 6.00 Sep 12, 2006 page 202 of 526
REJ09B0326-0600
7 6 5
PB PB
7 6
R R
Sleep Subsleep
High- High-
impedance impedance
4 3
PB PB
5 4 3
R R
PB input pin or AN
n
Standby Watch
High- High-
impedance impedance
2 1
PB PB PB
2 1
R R
(n = 7 to 0)
input pin
n
Subactive Active
High- High-
impedance impedance
(n = 7 to 0)
0
0
R