HD64F2145 Datasheet, PDF (223/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

8.9.2 Port 8 Data Register (P8DR)
P8DR stores output data for the port 8 pins (P86 to P80).
Bit Bit Name Initial Value R/W
7
—
1
—
6
P86DR
0
R/W
5
P85DR
0
R/W
4
P84DR
0
R/W
3
P83DR
0
R/W
2
P82DR
0
R/W
1
P81DR
0
R/W
0
P80DR
0
R/W
Description
Reserved
The initial value must not be changed.
If a port 8 read is performed while P8DDR bits are
set to 1, the P8DR values are read directly,
regardless of the actual pin states. If a port 8 read
is performed while P8DDR bits are cleared to 0, the
pin states are read.
8.9.3 Pin Functions
• P86/,548/ SCK1/SCL1
The pin function is switched as shown below according to the combination of the CKE1 and
CKE0 bits in SCR of SCI_1, the C/$ bit in SMR of SCI_1, the ICE bit in ICCR of IIC_1, and
the P86DDR bit.
ICE
0
1
CKE1
0
1
0
C/$
0
1
—
0
CKE0
0
1
—
—
0
P86DDR
0
1
—
—
—
—
Pin Function
P86
input pin
P86
SCK1
SCK1
output pin output pin output pin
SCK1
input pin
SCL1
I/O pin
,548 input pin*
Note:* When the IRQ5E bit in IER is set to 1, this pin is used as the ,548 input pin. When this pin
is used as the SCL1 I/O pin, bits CKE1 and CKE0 in SCR of SCI_1 and bit C/$ in SMR of
SCI_1 must all be cleared to 0. When the P86 output pin and SCK1 output pin are set, the
output type is NMOS push-pull output. SCL1 is an NMOS-only output, and has direct bus
drive capability.
Rev. 2.0, 08/02, page 183 of 788