Pin
Pin Functions and Selection Method
P84/IRQ3/
IOW*/TxD1
Bit TE in SCR of SCI1, bit STAC in STCR, bit P84DDR, and the operating mode
select the pin function as follows
Operating mode
STAC
Slave mode
Not slave mode
0
1
—
TE
—
—
0
1
0
1
P84DDR
Pin function
0
1
—
0
1
—
IOW
input*
P84
P84
TxD1
P84
P84
TxD1
input output output
input output output
IRQ3 input
IRQ3 input is usable when bit IRQ3E is set to 1 in IER
Note: * H8/3337 Series only. H8/3397 Series ICs have no IOW pin function.
P83/IOR*
P82/CS1*
P81/GA20*
Bit P83DDR and the operating mode select the pin function as follows
Operating mode
P83DDR
Slave mode
—
Not slave mode
0
1
Pin function
IOR input*
P83 input
P83 output
Note: * H8/3337 Series only. H8/3397 Series ICs have no IOR pin function.
Bit P82DDR and the operating mode select the pin function as follows
Operating mode
P82DDR
Slave mode
—
Not slave mode
0
1
Pin function
CS1 input*
P82 input
P82 output
Note: * H8/3337 Series only. H8/3397 Series ICs have no CS1 pin function.
Bit P81DDR and the operating mode select the pin function as follows
P81DDR
0
1
FGA20E
—
—
0
1
Operating mode
—
Not slave
mode
Slave mode
Pin function
P81 input
P81 output
GA20 output*
Note: * H8/3337 Series only. H8/3397 Series ICs have no GA20 pin function.
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RENESAS [ RENESAS TECHNOLOGY CORP ]
