Fujitsu F2MC-8L MB89620 Series Hardware Manual page 135

4.7 Port 6
4.7.1 Port 6 Register (PDR6)
This section describes the port-6 register.
n Port 6 Register Functions
Port 6 data register
The PDR6 register is a read-only data register. Reading the PDR6 register always returns the
signals input to the pins (the pin values).
Check: The external interrupt pin values are continuously input to the external interrupt circuit. When using
Table 4.7.1 lists the functions of the port 6 register.
Table 4.7.1 Port 6 Register Function
Register
Port 6 data register
(PDR6)
R : Read-only
X : Indeterminate
114
CHAPTER 4 I/O PORTS
as a standard input port, always set the interrupt request enable bit for the external interrupt circuit
to "0" to disable interrupt request output.
Data
Pin state is the "L"
0
level.
Pin state is the "H"
1
level.
Read Write
Writing is not permitted
(read-only).
Read/
Address Initial value
Write
R 0011 XXXXXXXX
H
MB89620 series
B