LM8322 datasheet(28/42 Pages) NSC

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17.0 Host Commands

Function

Cmd

Dir

Data Bytes

Description

READ_ID

0x80

nnnn nnnn

Read the manufacturer code (nnnn nnnn) and the device

revision number (pppp pppp).

pppp pppp

WRITE_CFG

0x81

nnnn nnnn

Write the hardware configuration register.

READ_INT

0x82

nnnn nnnn

Read the interrupt code, deassert the IRQ output, and clear

the code. (If the NOINIT bit is set, it remains set and IRQ

remains asserted until a WRITE_CFG command is received.

RESET

0x83

nnnn nnnn

Reset the LM8322. Error if nnnn nnnn is not 0xAA.

WRITE_PULL_DO

0x84

nnnn nnnn

Select pullup (0) or pulldown (1) direction for the

corresponding general-purpose I/O (GPIO) port pins.

pppp pppp

WRITE_PORT_SE

0x85

nnnn nnnn

Select input (0) or output (1) for the corresponding general-

purpose I/O (GPIO) port pins.

pppp pppp

WRITE_PORT_ST

ATE

0x86

nnnn nnnn

For pins configured as inputs, 0 selects high-impedance

mode and 1 enables a weak pullup. For pins configured as

outputs, each bit specifies the logic level driven on the pin.

pppp pppp

READ_PORT_SEL

0x87

nnnn nnnn

Read the direction of the corresponding GPIO port pins.

pppp pppp

READ_PORT_STA

0x88

nnnn nnnn

Read the state on the corresponding GPIO port pins.

pppp pppp

READ_FIFO

0x89

Up to 15 event

codes

Read an event from the FIFO.

Maximum of 14 event codes stored in the FIFO.

RPT_READ_FIFO

0x8A

Up to 15 event

codes

Repeats a FIFO read without advancing the FIFO pointer,

for example to retry a read after an error.

SET_ACTIVE

0x8B

nnnn nnnn

Set the time during which the LM8322 stays active before

entering Halt mode. The active time must be greater than the

debounce time. The default time is 500 milliseconds. The

valid range is 1255. Active time = n × 4 milliseconds.

READ_ERROR

0x8C

nnnn nnnn

Read and clear the error code.

SET_DEBOUNCE

0x8F

nnnn nnnn

Set the time for rescanning the keypad after detecting a key-

press or key-release event to verify the event. The default

time is 12 milliseconds. The valid range is 1255. Debounce

time = n × 4 milliseconds and must not exceed active time.

SET_KEY_SIZE

0x90

nnnn pppp

Set keypad size. nnnn = KP-Xx pins, pppp = KP-Yx pins

READ_KEY_SIZE

0x91

nnnn pppp

Read keypad size. nnnn = KP-Xx pins, pppp = KP-Yx pins

READ_CFG

0x92

nnnn nnnn

Read the hardware configuration register.

WRITE_CLOCK

0x93

nnnn nnnn

Write the clock configuration register.

READ_CLOCK

0x94

nnnn nnnn

Read the clock configuration register.

PWM_WRITE

0x95

aaaa aann

Write a command to the PWM script command file.

pppp pppp

nn = PWM channel number (01, 10, or 11)

qqqq qqqq

aaaaaa = address in script command file (059)

pppp pppp = high byte of script command

qqqq qqqq = low byte of script command

PWM_START

0x96

aaaa aann

Start script on channel nn (01, 10, or 11) at address aaaaaa.

PWM_STOP

0x97

0000 00nn

Stop script on channel nn (01, 10, or 11).

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