HD64F2149 Datasheet, PDF (287/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Pin
PB1/D1/WUE1/
HIRQ4/LSCI
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 PB1DDR.
Note: * When bit LSCIE is set to 1 in HICR0, bits HI12E and PB1DDR should
be cleared to 0.
Operating
mode
Modes 1, 2, 3
(EXPE = 1)
Modes 2, 3
(EXPE = 0)
LSCIE
—
0
1
HI12E
—
Either cleared to 0 1
—*
CS4E
—
1
—
ABW
0
1
—
—
—
PB1DDR
—
0
1
0
1
1
—*
Pin function D1
I/O pin
PB1
input
pin
PB1
output
pin
PB1
input
pin
PB1 HIRQ4 LSCI
output output output
pin
pin
pin
LSCI input pin
WUE1 input pin
Except when used as a data bus pin, this pin can always be used as the
WUE1 input pin.
The HIRQ4 output pin and LSCI I/O pin can only be used in mode 2 or 3
(EXPE = 0).
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