Oki Dr.63514, User Manual, Page: 78 / 101

Chapter 4. Additional Usage Notes
4-3
2. Input-output port (P0,P1,P2,P3,P4,P5,P6,P9,PA)
Ports 0 through 6, 9, and A in the ML63512/514 are I/O ports whose direction (input or output) can be
selected in bit units. When input mode is selected, either a pull-up resistor input or a high-impedance
input can be selected. When output mode is selected, either CMOS output or n-channel open-drain
output can be selected.
port0 to 6, 9, A
port (LCA)
150k
Ω
100 Ω
HC4066
HC4066
HC4066
HC4066
port6, 9, A
VDD
MAX901
operational
amplifier
10k Ω
30k
Ω
10k Ω
MAX901
AD826
D
CLK
Q
+
-
+
-
+
-
+
-
+
-
VDD
C
I/O
I/O
C
I/O
I/O
C
I/O I/O
C
I/O
I/O
VDD
+5V
48/64
ON
OFF
Port hysteresis circuit
Figure 4-2 Input-output port
3. Input port (P7)
Port 7 in the ML63512/514 is an input port for which either pull-up resistor input or high-impedance input
can be selected in bit units. Comparator and level detector input pin functions are also allocated to this
port as secondary functions.