LAPIS Semiconductor ML610471, Руководство пользователя, Страница: 177 / 281

ML610471/472/473/Q471/Q472/Q473 User's Manual
Chapter 13 Port 2
13-4
13.2.3 Port 2 Control Registers 0, 1 (P2CON0, P2CON1)
Address: 0F212H
Access: R/W
Access size: 8/16 bit
Initial value: 00H
7 6 5 4 3 2 1 0
P2CON0
⎯ ⎯ ⎯ ⎯ ⎯ ⎯
P21C0 P20C0
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
Address: 0F213H
Access: R/W
Access size: 8-bit
Initial value: 00H
7 6 5 4 3 2 1 0
P2CON1
⎯ ⎯ ⎯ ⎯ ⎯ ⎯
P21C1 P20C1
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
P2CON0 and P2CON1 are special function registers (SFRs) to select the output state of the output pin Port 2.
[Description of Bits]
•
P20C0, P21C0, P20C1, P21C1 (bits 0, 1)
The P20C0, P21C0, P20C1, P21C1 bits are used to select high-impedance output mode, P-channel open drain
output mode, N-channel open drain output mode, or CMOS output mode.
To directly drive LEDs, select N-channel open drain output mode.
P21C1 P21C0
Description
0 0 P21 pin: In high-impedance output mode (initial value)
0 1 P21 pin: In P-channel open drain output mode
1 0 P21 pin: In N-channel open drain output mode
1 1 P21 pin: In CMOS output mode
P20C1 P20C0 Description
0 0 P20 pin: In high-impedance output mode (initial value)
0 1 P20 pin: In P-channel open drain output mode
1 0 P20 pin: In N-channel open drain output mode
1 1 P20 pin: In CMOS output mode
Note:
In 48-pin plastic TQFP, P21 pin is not available.