Pin Functions; Pin States - Renesas Hitachi H8S/2194 Series Hardware Manual

(2) Port Data Register 0 (PDR0)
7
Bit :
PDR07
Initial value :
—
R/W :
R
Port data register 0 (PDR0) reads the port states. When the corresponding bit of PMR0 is 0
(general input port), the pin state is read if PDR0 is read. When the corresponding bit of PMR0
is 1 (analog input channel), 1 is read if PDR0 is read.
PDR0 is an 8-bit read-only register. When PDR0 is reset, its values become undefined.
11.2.3

Pin Functions

This section describes the pin functions of port 0 and their selection methods.
(1) P07/AN7 to P00/AN0
P07/AN7 to P00/AN0 are switched according to the PMR0n bit of PMR0 as shown below.
PMR0n
0
1
11.2.4

Pin States

Table 11.4 shows the pin 0 states in each operation mode.
Table 11.4 Port 0 Pin States
Pins Reset
PN7/AN7 to High-
P00/AN0 impedance
Rev. 2.0, 11/00, page 240 of 1037
6 5
PDR06 PDR05
— —
R R
Pin Function
P0n input pin
ANn input pin
Active Sleep
High- High-
impedance impedance
4 3
PDR04 PDR03 PDR02
— —
R R
Standby Watch
High- High-
impedance impedance
2 1 0
PDR01 PDR00
— — —
R R R
(n = 7 to 0)
Subactive Subsleep
High- High-
impedance impedance