Samsung C8278X ユーザーズマニュアル

 

 

 

Port 6 is a 4-bit I/O port with individually configurable pins. Port 6 pins are accessed directly by writing or reading 
the port 6 data register, P6 at location F6H in set 1, bank 0. P6.0-P6.3 can serve as inputs (with or without pull-
up), as push-pull output or you can be configured the following functions. 

•  Low-nibble pins (P6.0-P6.3): COM0−COM3 

Port 6 has an 8-bit control register: P6CON for P6.0-P6.3. A reset clears the P6CON register to "00H", configuring 
all pins to input mode. You use control register setting to select input (with or without pull-up) or push-pull output 
mode and enable the alternative functions. 

When programming this port, please remember that any alternative peripheral I/O function you configure using the 
port 6 control register must also be enabled in the associated peripheral module. 

Port 6 Control Register (P6CON)

EDH, Set 1, Bank 1, R/W

.7

.6

.5

.4

.3

.2

.1

.0

MSB

LSB

P6.1/COM1

P6.0/COM0

P6CON bit-pair pin configuration settings:

00

01

10

11

Push-pull output mode

Alternative function (COM3-COM0)

Input with pull-up resistor

Input mode

P6.2/COM2

P6.3/COM3