HD64F2149 Datasheet, PDF (286/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Pin
PB3/D3/WUE3/
CS4
Selection Method and Pin Functions
The pin function is switched as shown below according to the combination of
the operating mode, bits HI12E and CS4E in SYSCR2, bit ABW in WSCR, and
bit PB3DDR.
Operating
mode
Modes 1, 2, 3
(EXPE = 1)
Modes 2, 3
(EXPE = 0)
HI12E
—
Either cleared to 0
1
CS4E
—
1
ABW
0
1
—
—
PB3DDR
—
0
1
0
1
—
Pin function D3
PB3
PB3
PB3
PB3
CS4
I/O pin input pin output pin input pin output pin input pin
WUE3 input pin
Except when used as a data bus pin, this pin can always be used as the
WUE3 input pin.
The CS4 input pin can only be used in mode 2 or 3 (EXPE = 0).
PB2/D2/WUE2/
CS3
The pin function is switched as shown below according to the combination of
the operating mode, bits HI12E and CS3E in SYSCR2, bit ABW in WSCR, and
bit PB2DDR.
Operating
mode
Modes 1, 2, 3
(EXPE = 1)
Modes 2, 3
(EXPE = 0)
HI12E
—
Either cleared to 0
1
CS3E
—
1
ABW
0
1
—
—
PB2DDR
—
0
1
0
1
—
Pin function D2
PB2
PB2
PB2
PB2
CS3
I/O pin input pin output pin input pin output pin input pin
WUE2 input pin
Except when used as a data bus pin, this pin can always be used as the
WUE2 input pin.
The CS3 input pin can only be used in mode 2 or 3 (EXPE = 0).
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