LM8322 datasheet(30/42 Pages) NSC

30 / 42 page

17.3 READ_INT COMMAND

The READ_INT command consists of a command byte (0x82)

from the host and a data byte from the LM8322. The data byte

is the interrupt code. Reading the interrupt code acknowl-

edges the interrupt (which deasserts IRQ) and clears the

interrupt code. An exception to this behavior occurs if the

NOINIT bit is set, in which case IRQ will not be deasserted

and the interrupt code will not be cleared until a WRITE_CFG

command is received.

PWM2END PWM1END PWM0END NOINIT ERROR

KEYPAD

Bit

Value

Description

PWM2END

No interrupt from PWM channel 2.

An END script command was executed by PWM channel 2.

PWM1END

No interrupt from PWM channel 1.

An END script command was executed by PWM channel 1.

PWM0END

No interrupt from PWM channel 0.

An END script command was executed by PWM channel 0.

NOINIT

Normal operation.

LM8322 is waiting for the initialization sequence.

ERROR

No error condition is indicated.

An error condition occurred.

KEYPAD

No key-press or key-release event is indicated.

A key-press or key-release event occurred.

17.4 RESET COMMAND

The RESET command consists of a command byte (0x83)

and one data byte from the host. The command causes a re-

set, identical to an external reset. The data byte must be

0xAA, otherwise no reset will occur and an error condition will

be signalled.

LM8322 Datasheet(PDF) 30 Page - National Semiconductor (TI)