Rohm LAPIS SEMICONDUCTOR ML620Q503, User Manual

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ML620Q503/Q504 User’s Manual
Chapter 18 Port 1
FEUL620Q504 18–5
18.2.4 Port 1 Control Register (P1CON)
Address: 0F21AH
Access: R/W
Access size: 8/16 bits
Initial value: 0000H
7 6 5 4 3 2 1 0
P1CON0 – – – – – – P11C0 P10C0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value 0 0 0 0 0 0 0 0
15 14 13 12 11 10 9 8
P1CON1 – – – – – – P11C1 P10C1
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value 0 0 0 0 0 0 0 0
P1CON0 and P1CON1 are special function registers (SFRs) to select input/output state of the Port 1 pin. The
input/output state is different between input mode and output mode. Input or output is selected by using the P1DIR
register.
Description of Bits
•
P11-10C0 (bits 1 to 0) , P11-00C1 (bits 9 to 8)
The P11-10C1 pins and the P11-10C0 pins are used to select high-impedance output, P-channel open drain output,
N-channel open drain output, or CMOS output in output mode and to select high-impedance input, input with a
pull-down resistor, or input with a pull-up resistor in input mode.
Setting of P10 pin Description
P10C1 P10C0
When output mode selected
(P10DIR = 0)
When input mode selected
(P10DIR = 1)
0 0
P10 pin: High-impedance output (initial
value) P10 pin: high-impedance input
mode (initial value)
0 1 P10 pin: P-channel open drain output
P10 pin: input mode with a
pull-down resistor
1 0 P10 pin: N-channel open drain output
P10 pin: input mode with a pull-up
resistor
1 1 P10 pin: CMOS output
P10 pin: high-impedance input
mode
Setting of P11 pin Description
P11C1 P11C0
When output mode selected
(P11DIR = 0)
When input mode selected
(P11DIR = 1)
0 0
P11 pin: High-impedance output (initial
value) P11 pin: high-impedance input
mode (initial value)
0 1 P11 pin: P-channel open drain output
P11 pin: input mode with a
pull-down resistor
1 0 P11 pin: N-channel open drain output
P11 pin: input mode with a pull-up
resistor
1 1 P11 pin: CMOS output
P11 pin: high-impedance input
mode