Analog Devices ADSP-SC58 Series Hardware Reference Manual page 573

14 General-Purpose Ports (PORT)
This section describes general-purpose ports, pin multiplexing, general-purpose input/output (GPIO) functionality,
and pin interrupts. The general-purpose ports provide the following three functions:
• Pin multiplexing scheme
• GPIO functionality
• Pin interrupt requests
In this chapter, the naming convention for registers and bits omits the alphabetic group enumeration
NOTE:
to refer to any and all of the ports. For example,
PORTB_FER, and so on. Likewise PORT_FER.PX1 represents bits PA1, PB1, and so on.
TO/FROM
PERIPHERALS
PINT_LATCH (W1C)
Figure 14-1: Simplified GPIO and Pin Interrupt Signal Flow
ADSP-SC58x/ADSP-2158x SHARC+ Processor Hardware Reference
SIGNAL OUTPUT
PORTX (WRITE)
PORT_POL
PORTX (READ)
OUTPUT ENABLE
PORT_DIR
INPUT ENABLE
PORT_INEN
SIGNAL INPUT
PINT_PINSTATE
PINT_EDGE
PINT_REQ (W1C)
represents registers PORTA_FER,
PORT_FER
PORT_FER /
PORT_MUX
TEST_IE
PINT_POL_SET
PINT_LATCH (READ)
PINT_ASSIGN
PINT_REQ (READ)
PINT_MSK
General-Purpose Ports (PORT)
PAD
14–1