Renesas Hitachi H8S/2191, Hardware Manual

Page: 267 / 1065

Rev. 2.0, 11/00, page 240 of 1037
(2) Port Data Register 0 (PDR0)
0 1
R
2
R
3 4
R R
5 7
PDR04 PDR03 PDR02 PDR01 PDR00
R
PDR07
R R R
PDR06 PDR05
6
— — — — — — — —
Initial value :
R/W :
Bit :
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 Pin Function
0 P0n input pin
1 ANn input pin
(n = 7 to 0)
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 Active Sleep Standby Watch Subactive Subsleep
PN7/AN7 to
P00/AN0
High-
impedance
High-
impedance
High-
impedance
High-
impedance
High-
impedance
High-
impedance
High-
impedance