LAPIS Semiconductor ML610472, Руководство пользователя

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ML610471/472/473/Q471/Q472/Q473 User's Manual
Chapter 15 Port 4
15-6
15.2.4 Port 4 Control Registers 0, 1 (P4CON0, P4CON1)
Address: 0F222H
Access: R/W
Access size: 8/16 bit
Initial value: 00H
7 6 5 4 3 2 1 0
P4CON0
P47C0 P46C0 P45C0 P44C0 P43C0 P42C0
⎯ ⎯
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: 0F223H
Access: R/W
Access size: 8-bit
Initial value: 00H
7 6 5 4 3 2 1 0
P4CON1
P47C1 P46C1 P45C1 P44C1 P43C1 P42C1
⎯ ⎯
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
P4CON0 and P4CON1 are special function registers (SFRs) to select input/output state of the Port 4 pin. The
input/output state is different between input mode and output mode. Input or output is selected by using the P4DIR
register.
[Description of Bits]
•
P47C1 to P42C1, P47C0 to P42C0 (bits 7 to 2)
P47C1 to P42C1 and P47C0 to P42C0 are the bits for selecting the high-impedance output, P-channel open drain
output, N-channel open drain output, or CMOS output in output mode and for selecting the high-impedance input,
input with a pull-down resistor, or input with a pull-up resistor in input mode.
Setting of P47 pin
When output mode is selected (P47DIR
bit = “0”) When input mode is selected (P47DIR bit =
“1”)
P47C1 P47C0 Description
0 0 High-impedance output (initial value) High-impedance input
0 1 P-channel open drain output Input with a pull-down resistor
1 0 N-channel open drain output Input with a pull-up resistor
1 1 CMOS output High-impedance input
Setting of P46 pin
When output mode is selected (P46DIR
bit = “0”) When input mode is selected (P46DIR bit =
“1”)
P46C1 P46C0 Description
0 0 High-impedance output (initial value) High-impedance input
0 1 P-channel open drain output Input with a pull-down resistor
1 0 N-channel open drain output Input with a pull-up resistor
1 1 CMOS output High-impedance input