LAPIS Semiconductor ML610421, Руководство пользователя, Страница: 287 / 437

ML610Q421/ML610Q422/ML610421User’s Manual
Chapter 22 Port A
22 – 5
22.2.4 Port A Control Registers 0, 1 (PACON0, PACON1)
Address: 0F252H
Access: R/W
Access size: 8/16 bits
Initial value: 00H
7 6 5 4 3 2 1 0
PACON0 PA7C0 PA6C0 PA5C0 PA4C0 PA3C0 PA2C0 PA1C0 PA0C0
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: 0F253H
Access: R/W
Access size: 8 bits
Initial value: 00H
7 6 5 4 3 2 1 0
PACON1 PA7C1 PA6C1 PA5C1 PA4C1 PA3C1 PA2C1 PA1C1 PA0C1
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
PACON0 and PACON1 are special function registers (SFRs) to select input/output state of the Port A pin. The
input/output state is different between input mode and output mode. Input or output is selected by using the PADIR
register.
[Description of Bits]
•
PA7C1-PA0C1, PA7C0-PA0C0 (bits 7-0)
The PA7C1 to PA0C1 pins and the PA7C0 to PA0C0 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 PA7 pin
When output mode is selected
(PA7DIR bit = “0”)
When input mode is selected
(PA7DIR bit = “1”)
PA7C1 PA7C0 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 PA6 pin
When output mode is selected
(PA6DIR bit = “0”)
When input mode is selected
(PA6DIR bit = “1”)
PA6C1 PA6C0 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 PA5 pin
When output mode is selected
(PA5DIR bit = “0”)
When input mode is selected
(PA5DIR bit = “1”)
PA5C1 PA5C0 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