HD64F3437TF16 Datasheet, PDF (174/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

Pin
P9₃/RD
Pin Functions and Selection Method
Bit P9₃DDR and the operating mode select the pin function as follows
Operating mode Modes 1 and 2
Mode 3
P9₃DDR
Pin function
—
RD output
0
P9₃ input
1
P9₃ output
P9₂/IRQ₀
P9₁/IRQ₁/
EIOW
P9₀/IRQ₂/
ADTRG/ECS₂
P9₂DDR
0
1
Pin function
P9₂ input
P9₂ output
IRQ₀ input*
Note: * IRQ₀ input can be used when bit IRQ0E is set to 1 in IER
Bit STAC in STCR, bit P9₁DDR, and the operating mode select the pin function
as follows
Operating mode
Slave mode
Not slave mode
STAC
0
1
—
P9₁DDR
Pin function
0
1
P9₁ input P9₁ output
—
EIOW
input
0
1
P9₁ input P9₁ output
IRQ₁ input*
Note: * IRQ₁ input can be used when bit IRQ1E is set to 1 in IER
Bit STAC in STCR, bit P9₀DDR, and the operating mode select the pin function
as follows
Operating mode
Slave mode
Not slave mode
STAC
0
1
—
P9₀DDR
0
1
—
0
1
Pin function
P9₀ input P9₀ output ECS₂ input P9₀ input P9₀ output
IRQ₂ input^*1 and
ADTRG input^*2
IRQ₂
input^*1
IRQ₂ input^*1 and
ADTRG input^*2
Notes: *1 IRQ₂ input can be used when bit IRQ2E is set to 1 in IER
*2 ADTRG input can be used when bit TRGE is set to 1 in ADCR
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