HD64F3337YCP16V Datasheet, PDF (180/749 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

7.9.3 Pin Functions
Pins P8₆ to P8₀ are multiplexed with HIF input/output, SCI1 input/output, I²C clock input/output,
and IRQ₅ to IRQ₃ input. Table 7.17 indicates the functions of pins P8₆ to P8_0.
Table 7.17 Port 8 Pin Functions
Pin
P8₆/IRQ₅/
SCK₁/SCL*
P8₅/IRQ₄/
CS₂*/RxD₁
Pin Functions and Selection Method
Bit C/A in SMR of SCI1, bits CKE0 and CKE1 in SCR of SCI1, bit ICE in ICCR,
and bit P8₆DDR select the pin function as follows
ICE
0
1
CKE1
0
1
—
C/A
0
1
—
—
CKE0
0
1
—
—
—
P8₆DDR
Pin function
0
P8₆
input
1
P8₆
output
—
SCK₁
output
—
SCK₁
output
—
SCK₁
intput
—
SCL
input/
output*
IRQ₅ input
IRQ₅ input is usable when bit IRQ5E is set to 1 in IER
Note: * H8/3337 Series only. H8/3397 Series ICs have no SCL pin function.
Bit RE in SCR of SCI1, bit STAC in STCR, bit P8₅DDR, and the operating mode
select the pin function as follows
Operating mode
Slave mode
Not slave mode
STAC
0
1
—
RE
—
0
1
0
1
P8₅DDR
Pin function
—
CS₂
input*
0
P8₅
input
1
P8₅
output
—
RxD₁
input
0
P8₅
input
1
P8₅
output
—
RxD₁
input
IRQ₄ input
IRQ₄ input is usable when bit IRQ4E is set to 1 in IER
Note: * H8/3337 Series only. H8/3397 Series ICs have no CS₂ pin function.
148