Port B Registers - Fujitsu F2MC-8FX Hardware Manual

CHAPTER 9 I/O PORT
9.9.1

Port B Registers

This section describes the port B registers.
Port B Register Function
Table 9.9-2 lists the port B register functions.
Table 9.9-2 Port B Register Function
Register
Data
name
0
PDRB
1
0
DDRB
1
0
ILSR3
1
Table 9.9-3 lists the correspondence between port B pins and each register bit.
Table 9.9-3 Correspondence Between Registers and Pins for Port B
Pin name PB7
PDRB
bit7
DDRB
ILSR3
bit0
142
Read
Pin state is "L" level.
Pin state is "H" level.
Correspondence between related register bits and pins
PB6 PB5
bit6 bit5
bit0 bit0
Read read-modify-write
PDR value is "0".
PDR value is "1".
Port input enabled
Port output enabled
Hysteresis input level
Automotive input level
PB4 PB3 PB2
bit4 bit3 bit2
bit0 bit0 bit0
Write
As output port, outputs
"L" level.
As output port, outputs
"H" level.
PB1 PB0
bit1 bit0
bit0 bit0