Port 0 - Samsung S3F84B8 User Manual

S3F84B8_UM_REV 1.00

9.1.1.1 Port 0

Port 0 is a 6-bit I/O port that you can use in two ways:

General-purpose I/O

Alternative function
Port 0 is accessed directly by writing or reading the port 0 data register, P0, at location E0H, Set1 Bank0.
9.1.1.1.1 Port 0 Control Register (P0CONH, P0CONL)
Port 0 pins are configured individually by setting bit-pair in two control registers located at
P0CONH (high byte, E4H, Set1 Bank0) and P0CONL (low byte, E3H, Set1 Bank0).
When you select the output mode, a push-pull or an open-drain circuit is configured. Different selections are
available such as:

Input mode

Output mode (Push-pull or Open-drain)

Alternative function: External Interrupt – INT0, INT1, INT2, INT3, INT4, INT5

Alternative function: BUZ output - BUZ

Alternative function: PWM output - PWM

Alternative function: Timer A output - TAOUT

Alternative function: RESETB (by Smart option)
9-2
9 I/O PORTS