HD64F2149 Datasheet, PDF (272/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Pin
P94/HWR/IOW
Selection Method and Pin Functions
The pin function is switched as shown below according to the combination of
operating mode, bit HI12E in SYSCR2, and bit P94DDR.
Operating Modes 1, 2, 3
mode
(EXPE = 1)
Modes 2, 3 (EXPE = 0)
HI12E
—
0
1
P94DDR
—
0
1
—
Pin function
HWR
output pin
P94
input pin
P94
output pin
IOW
input pin
P93/RD/IOR
The pin function is switched as shown below according to the combination of
operating mode, bit HI12E in SYSCR2, and bit P93DDR.
Operating Modes 1, 2, 3
mode
(EXPE = 1)
Modes 2, 3 (EXPE = 0)
HI12E
—
0
1
P93DDR
—
0
1
—
Pin function RD output pin P93 input pin P93 output pin IOR input pin
P92/IRQ0
P92DDR
0
1
Pin function
P92 input pin
P92 output pin
IRQ0 input pin
When bit IRQ0E in IER is set to 1, this pin is used as the IRQ0 input pin.
P91/IRQ1
P91DDR
0
1
Pin function
P91 input pin
P91 output pin
IRQ1 input pin
When bit IRQ1E in IER is set to 1, this pin is used as the IRQ1 input pin.
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